view tests/test-run-tests.t @ 47802:de2e04fe4897

hgwebdir: avoid systematic full garbage collection

Forcing a systematic full garbage collection upon each request
can serioulsy harm performance. This is reported as
https://bz.mercurial-scm.org/show_bug.cgi?id=6075

With this change we're performing the full collection according
to a new setting, `experimental.web.full-garbage-collection-rate`.
The default value is 1, which doesn't change the behavior and will
allow us to test on real use cases. If the value is 0, no full garbage
collection occurs.

Regardless of the value of the setting, a partial garbage collection
still occurs upon each request (not attempting to collect objects from
the oldest generation). This should be enough to take care of
reference cycles that have been created by the last request
(assessment of this requires changing the setting, not to be 1).

In my experience chasing memory leaks in Mercurial servers,
the full collection never reclaimed any memory, but this is with
Python 3 and biased towards small repositories.

On the other hand, as explained in the Python developer docs [1],
frequent full collections are very harmful in terms of performance if
lots of objects survive the collection, and hence stay in the
oldest generation. Note that `gc.collect()` is indeed trying to
collect the oldest generation [2]. This happens usually in two cases:

- unwanted lingering objects (i.e., an actual memory leak that
  the GC cannot do anything about). Sadly, we have lots of those
  these days.
- desireable long-term objects, typically in caches (not inner caches
  carried by repositories, which should be collected with them). This
  is a subject of interest for the Heptapod project.

In short, the flat rate that this change still permits is
probably a bad idea in most cases, and the default value can
be tweaked later on (or even be set to 0) according to experiments
in the wild.

The test is inspired from test-hgwebdir-paths.py

[1] https://devguide.python.org/garbage_collector/#collecting-the-oldest-generation
[2] https://docs.python.org/3/library/gc.html#gc.collect

Differential Revision: https://phab.mercurial-scm.org/D11204

This file tests the behavior of run-tests.py itself.

Avoid interference from actual test env:

  $ . "$TESTDIR/helper-runtests.sh"

Smoke test with install
============
  $ "$PYTHON" $TESTDIR/run-tests.py $HGTEST_RUN_TESTS_PURE -l
  running 0 tests using 0 parallel processes 
  
  # Ran 0 tests, 0 skipped, 0 failed.

Define a helper to avoid the install step
=============
  $ rt()
  > {
  >     "$PYTHON" $TESTDIR/run-tests.py --with-hg=$HGTEST_REAL_HG -j1 "$@"
  > }

error paths

#if symlink
  $ ln -s `which true` hg
  $ "$PYTHON" $TESTDIR/run-tests.py --with-hg=./hg
  warning: --with-hg should specify an hg script, not: true
  running 0 tests using 0 parallel processes 
  
  # Ran 0 tests, 0 skipped, 0 failed.
  $ rm hg
#endif

#if execbit
  $ touch hg
  $ "$PYTHON" $TESTDIR/run-tests.py --with-hg=./hg
  usage: run-tests.py [options] [tests]
  run-tests.py: error: --with-hg must specify an executable hg script
  [2]
  $ rm hg
#endif

Features for testing optional lines
===================================

  $ cat > hghaveaddon.py <<EOF
  > import hghave
  > @hghave.check("custom", "custom hghave feature")
  > def has_custom():
  >     return True
  > @hghave.check("missing", "missing hghave feature")
  > def has_missing():
  >     return False
  > EOF

an empty test
=======================

  $ touch test-empty.t
  $ rt
  running 1 tests using 1 parallel processes 
  .
  # Ran 1 tests, 0 skipped, 0 failed.
  $ rm test-empty.t

a succesful test
=======================

  $ cat > test-success.t << EOF
  >   $ echo babar
  >   babar
  >   $ echo xyzzy
  >   dont_print (?)
  >   nothing[42]line (re) (?)
  >   never*happens (glob) (?)
  >   more_nothing (?)
  >   xyzzy
  >   nor this (?)
  >   $ printf 'abc\ndef\nxyz\n'
  >   123 (?)
  >   abc
  >   def (?)
  >   456 (?)
  >   xyz
  >   $ printf 'zyx\nwvu\ntsr\n'
  >   abc (?)
  >   zyx (custom !)
  >   wvu
  >   no_print (no-custom !)
  >   tsr (no-missing !)
  >   missing (missing !)
  > EOF

  $ rt
  running 1 tests using 1 parallel processes 
  .
  # Ran 1 tests, 0 skipped, 0 failed.

failing test
==================

test churn with globs
  $ cat > test-failure.t <<EOF
  >   $ echo "bar-baz"; echo "bar-bad"; echo foo
  >   bar*bad (glob)
  >   bar*baz (glob)
  >   | fo (re)
  > EOF
  $ rt test-failure.t
  running 1 tests using 1 parallel processes 
  
  --- $TESTTMP/test-failure.t
  +++ $TESTTMP/test-failure.t.err
  @@ -1,4 +1,4 @@
     $ echo "bar-baz"; echo "bar-bad"; echo foo
  +  bar*baz (glob)
     bar*bad (glob)
  -  bar*baz (glob)
  -  | fo (re)
  +  foo
  
  ERROR: test-failure.t output changed
  !
  Failed test-failure.t: output changed
  # Ran 1 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

test how multiple globs gets matched with lines in output
  $ cat > test-failure-globs.t <<EOF
  >   $ echo "context"; echo "context"; \
  >     echo "key: 1"; echo "value: not a"; \
  >     echo "key: 2"; echo "value: not b"; \
  >     echo "key: 3"; echo "value: c"; \
  >     echo "key: 4"; echo "value: d"
  >   context
  >   context
  >   key: 1
  >   value: a
  >   key: 2
  >   value: b
  >   key: 3
  >   value: * (glob)
  >   key: 4
  >   value: * (glob)
  > EOF
  $ rt test-failure-globs.t
  running 1 tests using 1 parallel processes 
  
  --- $TESTTMP/test-failure-globs.t
  +++ $TESTTMP/test-failure-globs.t.err
  @@ -2,9 +2,9 @@
     context
     context
     key: 1
  -  value: a
  +  value: not a
     key: 2
  -  value: b
  +  value: not b
     key: 3
     value: * (glob)
     key: 4
  
  ERROR: test-failure-globs.t output changed
  !
  Failed test-failure-globs.t: output changed
  # Ran 1 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]
  $ rm test-failure-globs.t

test diff colorisation

#if no-windows pygments
  $ rt test-failure.t --color always
  running 1 tests using 1 parallel processes 
  
  \x1b[38;5;124m--- $TESTTMP/test-failure.t\x1b[39m (esc)
  \x1b[38;5;34m+++ $TESTTMP/test-failure.t.err\x1b[39m (esc)
  \x1b[38;5;90;01m@@ -1,4 +1,4 @@\x1b[39;00m (esc)
     $ echo "bar-baz"; echo "bar-bad"; echo foo
  \x1b[38;5;34m+  bar*baz (glob)\x1b[39m (esc)
     bar*bad (glob)
  \x1b[38;5;124m-  bar*baz (glob)\x1b[39m (esc)
  \x1b[38;5;124m-  | fo (re)\x1b[39m (esc)
  \x1b[38;5;34m+  foo\x1b[39m (esc)
  
  \x1b[38;5;88mERROR: \x1b[39m\x1b[38;5;9mtest-failure.t\x1b[39m\x1b[38;5;88m output changed\x1b[39m (esc)
  !
  \x1b[38;5;88mFailed \x1b[39m\x1b[38;5;9mtest-failure.t\x1b[39m\x1b[38;5;88m: output changed\x1b[39m (esc)
  # Ran 1 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

  $ rt test-failure.t 2> tmp.log
  running 1 tests using 1 parallel processes 
  [1]
  $ cat tmp.log
  
  --- $TESTTMP/test-failure.t
  +++ $TESTTMP/test-failure.t.err
  @@ -1,4 +1,4 @@
     $ echo "bar-baz"; echo "bar-bad"; echo foo
  +  bar*baz (glob)
     bar*bad (glob)
  -  bar*baz (glob)
  -  | fo (re)
  +  foo
  
  ERROR: test-failure.t output changed
  !
  Failed test-failure.t: output changed
  # Ran 1 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
#endif

  $ cat > test-failure.t << EOF
  >   $ true
  >   should go away (true !)
  >   $ true
  >   should stay (false !)
  > 
  > Should remove first line, not second or third
  >   $ echo 'testing'
  >   baz*foo (glob) (true !)
  >   foobar*foo (glob) (false !)
  >   te*ting (glob) (true !)
  > 
  > Should keep first two lines, remove third and last
  >   $ echo 'testing'
  >   test.ng (re) (true !)
  >   foo.ar (re) (false !)
  >   b.r (re) (true !)
  >   missing (?)
  >   awol (true !)
  > 
  > The "missing" line should stay, even though awol is dropped
  >   $ echo 'testing'
  >   test.ng (re) (true !)
  >   foo.ar (?)
  >   awol
  >   missing (?)
  > EOF
  $ rt test-failure.t
  running 1 tests using 1 parallel processes 
  
  --- $TESTTMP/test-failure.t
  +++ $TESTTMP/test-failure.t.err
  @@ -1,11 +1,9 @@
     $ true
  -  should go away (true !)
     $ true
     should stay (false !)
   
   Should remove first line, not second or third
     $ echo 'testing'
  -  baz*foo (glob) (true !)
     foobar*foo (glob) (false !)
     te*ting (glob) (true !)
   
     foo.ar (re) (false !)
     missing (?)
  @@ -13,13 +11,10 @@
     $ echo 'testing'
     test.ng (re) (true !)
     foo.ar (re) (false !)
  -  b.r (re) (true !)
     missing (?)
  -  awol (true !)
   
   The "missing" line should stay, even though awol is dropped
     $ echo 'testing'
     test.ng (re) (true !)
     foo.ar (?)
  -  awol
     missing (?)
  
  ERROR: test-failure.t output changed
  !
  Failed test-failure.t: output changed
  # Ran 1 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

basic failing test
  $ cat > test-failure.t << EOF
  >   $ echo babar
  >   rataxes
  > This is a noop statement so that
  > this test is still more bytes than success.
  > pad pad pad pad............................................................
  > pad pad pad pad............................................................
  > pad pad pad pad............................................................
  > pad pad pad pad............................................................
  > pad pad pad pad............................................................
  > pad pad pad pad............................................................
  > EOF

  >>> fh = open('test-failure-unicode.t', 'wb')
  >>> fh.write(u'  $ echo babar\u03b1\n'.encode('utf-8')) and None
  >>> fh.write(u'  l\u03b5\u03b5t\n'.encode('utf-8')) and None

  $ rt
  running 3 tests using 1 parallel processes 
  
  --- $TESTTMP/test-failure.t
  +++ $TESTTMP/test-failure.t.err
  @@ -1,5 +1,5 @@
     $ echo babar
  -  rataxes
  +  babar
   This is a noop statement so that
   this test is still more bytes than success.
   pad pad pad pad............................................................
  
  ERROR: test-failure.t output changed
  !.
  --- $TESTTMP/test-failure-unicode.t
  +++ $TESTTMP/test-failure-unicode.t.err
  @@ -1,2 +1,2 @@
     $ echo babar\xce\xb1 (esc)
  -  l\xce\xb5\xce\xb5t (esc)
  +  babar\xce\xb1 (esc)
  
  ERROR: test-failure-unicode.t output changed
  !
  Failed test-failure-unicode.t: output changed
  Failed test-failure.t: output changed
  # Ran 3 tests, 0 skipped, 2 failed.
  python hash seed: * (glob)
  [1]

test --outputdir
  $ mkdir output
  $ rt --outputdir output
  running 3 tests using 1 parallel processes 
  
  --- $TESTTMP/test-failure.t
  +++ $TESTTMP/output/test-failure.t.err
  @@ -1,5 +1,5 @@
     $ echo babar
  -  rataxes
  +  babar
   This is a noop statement so that
   this test is still more bytes than success.
   pad pad pad pad............................................................
  
  ERROR: test-failure.t output changed
  !.
  --- $TESTTMP/test-failure-unicode.t
  +++ $TESTTMP/output/test-failure-unicode.t.err
  @@ -1,2 +1,2 @@
     $ echo babar\xce\xb1 (esc)
  -  l\xce\xb5\xce\xb5t (esc)
  +  babar\xce\xb1 (esc)
  
  ERROR: test-failure-unicode.t output changed
  !
  Failed test-failure-unicode.t: output changed
  Failed test-failure.t: output changed
  # Ran 3 tests, 0 skipped, 2 failed.
  python hash seed: * (glob)
  [1]
  $ ls -a output
  .
  ..
  .testtimes
  test-failure-unicode.t.err
  test-failure.t.err

test --xunit support
  $ rt --xunit=xunit.xml
  running 3 tests using 1 parallel processes 
  
  --- $TESTTMP/test-failure.t
  +++ $TESTTMP/test-failure.t.err
  @@ -1,5 +1,5 @@
     $ echo babar
  -  rataxes
  +  babar
   This is a noop statement so that
   this test is still more bytes than success.
   pad pad pad pad............................................................
  
  ERROR: test-failure.t output changed
  !.
  --- $TESTTMP/test-failure-unicode.t
  +++ $TESTTMP/test-failure-unicode.t.err
  @@ -1,2 +1,2 @@
     $ echo babar\xce\xb1 (esc)
  -  l\xce\xb5\xce\xb5t (esc)
  +  babar\xce\xb1 (esc)
  
  ERROR: test-failure-unicode.t output changed
  !
  Failed test-failure-unicode.t: output changed
  Failed test-failure.t: output changed
  # Ran 3 tests, 0 skipped, 2 failed.
  python hash seed: * (glob)
  [1]
  $ cat xunit.xml
  <?xml version="1.0" encoding="utf-8"?>
  <testsuite errors="0" failures="2" name="run-tests" skipped="0" tests="3">
    <testcase name="test-success.t" time="*"/> (glob)
    <testcase name="test-failure-unicode.t" time="*"> (glob)
      <failure message="output changed" type="output-mismatch"><![CDATA[--- $TESTTMP/test-failure-unicode.t (py38 !)
      <failure message="output changed" type="output-mismatch"> (no-py38 !)
  <![CDATA[--- $TESTTMP/test-failure-unicode.t (no-py38 !)
  +++ $TESTTMP/test-failure-unicode.t.err
  @@ -1,2 +1,2 @@
     $ echo babar\xce\xb1 (esc)
  -  l\xce\xb5\xce\xb5t (esc)
  +  babar\xce\xb1 (esc)
  ]]></failure> (py38 !)
  ]]>    </failure> (no-py38 !)
    </testcase>
    <testcase name="test-failure.t" time="*"> (glob)
      <failure message="output changed" type="output-mismatch"><![CDATA[--- $TESTTMP/test-failure.t (py38 !)
      <failure message="output changed" type="output-mismatch"> (no-py38 !)
  <![CDATA[--- $TESTTMP/test-failure.t (no-py38 !)
  +++ $TESTTMP/test-failure.t.err
  @@ -1,5 +1,5 @@
     $ echo babar
  -  rataxes
  +  babar
   This is a noop statement so that
   this test is still more bytes than success.
   pad pad pad pad............................................................
  ]]></failure> (py38 !)
  ]]>    </failure> (no-py38 !)
    </testcase>
  </testsuite>

  $ cat .testtimes
  test-empty.t * (glob)
  test-failure-globs.t * (glob)
  test-failure-unicode.t * (glob)
  test-failure.t * (glob)
  test-success.t * (glob)

  $ rt --list-tests
  test-failure-unicode.t
  test-failure.t
  test-success.t

  $ rt --list-tests --json
  test-failure-unicode.t
  test-failure.t
  test-success.t
  $ cat report.json
  testreport ={
      "test-failure-unicode.t": {
          "result": "success"
      },
      "test-failure.t": {
          "result": "success"
      },
      "test-success.t": {
          "result": "success"
      }
  } (no-eol)

  $ rt --list-tests --xunit=xunit.xml
  test-failure-unicode.t
  test-failure.t
  test-success.t
  $ cat xunit.xml
  <?xml version="1.0" encoding="utf-8"?>
  <testsuite errors="0" failures="0" name="run-tests" skipped="0" tests="0">
    <testcase name="test-failure-unicode.t"/>
    <testcase name="test-failure.t"/>
    <testcase name="test-success.t"/>
  </testsuite>

  $ rt --list-tests test-failure* --json --xunit=xunit.xml --outputdir output
  test-failure-unicode.t
  test-failure.t
  $ cat output/report.json
  testreport ={
      "test-failure-unicode.t": {
          "result": "success"
      },
      "test-failure.t": {
          "result": "success"
      }
  } (no-eol)
  $ cat xunit.xml
  <?xml version="1.0" encoding="utf-8"?>
  <testsuite errors="0" failures="0" name="run-tests" skipped="0" tests="0">
    <testcase name="test-failure-unicode.t"/>
    <testcase name="test-failure.t"/>
  </testsuite>

  $ rm test-failure-unicode.t

test for --retest
====================

  $ rt --retest
  running 1 tests using 1 parallel processes 
  
  --- $TESTTMP/test-failure.t
  +++ $TESTTMP/test-failure.t.err
  @@ -1,5 +1,5 @@
     $ echo babar
  -  rataxes
  +  babar
   This is a noop statement so that
   this test is still more bytes than success.
   pad pad pad pad............................................................
  
  ERROR: test-failure.t output changed
  !
  Failed test-failure.t: output changed
  # Ran 1 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

--retest works with --outputdir
  $ rm -r output
  $ mkdir output
  $ mv test-failure.t.err output
  $ rt --retest --outputdir output
  running 1 tests using 1 parallel processes 
  
  --- $TESTTMP/test-failure.t
  +++ $TESTTMP/output/test-failure.t.err
  @@ -1,5 +1,5 @@
     $ echo babar
  -  rataxes
  +  babar
   This is a noop statement so that
   this test is still more bytes than success.
   pad pad pad pad............................................................
  
  ERROR: test-failure.t output changed
  !
  Failed test-failure.t: output changed
  # Ran 1 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

Selecting Tests To Run
======================

successful

  $ rt test-success.t
  running 1 tests using 1 parallel processes 
  .
  # Ran 1 tests, 0 skipped, 0 failed.

success w/ keyword
  $ rt -k xyzzy
  running 2 tests using 1 parallel processes 
  .
  # Ran 2 tests, 1 skipped, 0 failed.

failed

  $ rt test-failure.t
  running 1 tests using 1 parallel processes 
  
  --- $TESTTMP/test-failure.t
  +++ $TESTTMP/test-failure.t.err
  @@ -1,5 +1,5 @@
     $ echo babar
  -  rataxes
  +  babar
   This is a noop statement so that
   this test is still more bytes than success.
   pad pad pad pad............................................................
  
  ERROR: test-failure.t output changed
  !
  Failed test-failure.t: output changed
  # Ran 1 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

failure w/ keyword
  $ rt -k rataxes
  running 2 tests using 1 parallel processes 
  
  --- $TESTTMP/test-failure.t
  +++ $TESTTMP/test-failure.t.err
  @@ -1,5 +1,5 @@
     $ echo babar
  -  rataxes
  +  babar
   This is a noop statement so that
   this test is still more bytes than success.
   pad pad pad pad............................................................
  
  ERROR: test-failure.t output changed
  !
  Failed test-failure.t: output changed
  # Ran 2 tests, 1 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

Verify that when a process fails to start we show a useful message
==================================================================

  $ cat > test-serve-fail.t <<EOF
  >   $ echo 'abort: child process failed to start blah'
  > EOF
  $ rt test-serve-fail.t
  running 1 tests using 1 parallel processes 
  
  --- $TESTTMP/test-serve-fail.t
  +++ $TESTTMP/test-serve-fail.t.err
  @@ -1* +1,2 @@ (glob)
     $ echo 'abort: child process failed to start blah'
  +  abort: child process failed to start blah
  
  ERROR: test-serve-fail.t output changed
  !
  Failed test-serve-fail.t: server failed to start (HGPORT=*) (glob)
  # Ran 1 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]
  $ rm test-serve-fail.t

Verify that we can try other ports
===================================

Extensions aren't inherited by the invoked run-tests.py. An extension
introducing a repository requirement could cause this to fail. So we force
HGRCPATH to get a clean environment.

  $ HGRCPATH= hg init inuse
  $ hg serve -R inuse -p $HGPORT -d --pid-file=blocks.pid
  $ cat blocks.pid >> $DAEMON_PIDS
  $ cat > test-serve-inuse.t <<EOF
  >   $ hg serve -R `pwd`/inuse -p \$HGPORT -d --pid-file=hg.pid
  >   $ cat hg.pid >> \$DAEMON_PIDS
  > EOF
  $ rt test-serve-inuse.t
  running 1 tests using 1 parallel processes 
  .
  # Ran 1 tests, 0 skipped, 0 failed.
  $ rm test-serve-inuse.t
  $ killdaemons.py $DAEMON_PIDS

Running In Debug Mode
======================

  $ rt --debug 2>&1 | grep -v pwd
  running 2 tests using 1 parallel processes 
  + echo *SALT* 0 0 (glob)
  *SALT* 0 0 (glob)
  + echo babar
  babar
  + echo *SALT* 10 0 (glob)
  *SALT* 10 0 (glob)
  *+ echo *SALT* 0 0 (glob)
  *SALT* 0 0 (glob)
  + echo babar
  babar
  + echo *SALT* 2 0 (glob)
  *SALT* 2 0 (glob)
  + echo xyzzy
  xyzzy
  + echo *SALT* 9 0 (glob)
  *SALT* 9 0 (glob)
  + printf *abc\ndef\nxyz\n* (glob)
  abc
  def
  xyz
  + echo *SALT* 15 0 (glob)
  *SALT* 15 0 (glob)
  + printf *zyx\nwvu\ntsr\n* (glob)
  zyx
  wvu
  tsr
  + echo *SALT* 22 0 (glob)
  *SALT* 22 0 (glob)
  .
  # Ran 2 tests, 0 skipped, 0 failed.

Parallel runs
==============

(duplicate the failing test to get predictable output)
  $ cp test-failure.t test-failure-copy.t

  $ rt --jobs 2 test-failure*.t -n
  running 2 tests using 2 parallel processes 
  !!
  Failed test-failure*.t: output changed (glob)
  Failed test-failure*.t: output changed (glob)
  # Ran 2 tests, 0 skipped, 2 failed.
  python hash seed: * (glob)
  [1]

failures in parallel with --first should only print one failure
  $ rt --jobs 2 --first test-failure*.t
  running 2 tests using 2 parallel processes 
  
  --- $TESTTMP/test-failure*.t (glob)
  +++ $TESTTMP/test-failure*.t.err (glob)
  @@ -1,5 +1,5 @@
     $ echo babar
  -  rataxes
  +  babar
   This is a noop statement so that
   this test is still more bytes than success.
   pad pad pad pad............................................................
  
  Failed test-failure*.t: output changed (glob)
  Failed test-failure*.t: output changed (glob)
  # Ran 2 tests, 0 skipped, 2 failed.
  python hash seed: * (glob)
  [1]


(delete the duplicated test file)
  $ rm test-failure-copy.t

multiple runs per test should be parallelized

  $ rt --jobs 2 --runs-per-test 2 test-success.t
  running 2 tests using 2 parallel processes 
  ..
  # Ran 2 tests, 0 skipped, 0 failed.

Interactive run
===============

(backup the failing test)
  $ cp test-failure.t backup

Refuse the fix

  $ echo 'n' | rt -i
  running 2 tests using 1 parallel processes 
  
  --- $TESTTMP/test-failure.t
  +++ $TESTTMP/test-failure.t.err
  @@ -1,5 +1,5 @@
     $ echo babar
  -  rataxes
  +  babar
   This is a noop statement so that
   this test is still more bytes than success.
   pad pad pad pad............................................................
  Accept this change? [y/N] 
  ERROR: test-failure.t output changed
  !.
  Failed test-failure.t: output changed
  # Ran 2 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

  $ cat test-failure.t
    $ echo babar
    rataxes
  This is a noop statement so that
  this test is still more bytes than success.
  pad pad pad pad............................................................
  pad pad pad pad............................................................
  pad pad pad pad............................................................
  pad pad pad pad............................................................
  pad pad pad pad............................................................
  pad pad pad pad............................................................

Interactive with custom view

  $ echo 'n' | rt -i --view echo
  running 2 tests using 1 parallel processes 
  $TESTTMP/test-failure.t $TESTTMP/test-failure.t.err
  Accept this change? [y/N]* (glob)
  ERROR: test-failure.t output changed
  !.
  Failed test-failure.t: output changed
  # Ran 2 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

View the fix

  $ echo 'y' | rt --view echo
  running 2 tests using 1 parallel processes 
  $TESTTMP/test-failure.t $TESTTMP/test-failure.t.err
  
  ERROR: test-failure.t output changed
  !.
  Failed test-failure.t: output changed
  # Ran 2 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

Accept the fix

  $ cat >> test-failure.t <<EOF
  >   $ echo 'saved backup bundle to \$TESTTMP/foo.hg'
  >   saved backup bundle to \$TESTTMP/foo.hg
  >   $ echo 'saved backup bundle to \$TESTTMP/foo.hg'
  >   saved backup bundle to $TESTTMP\\foo.hg
  >   $ echo 'saved backup bundle to \$TESTTMP/foo.hg'
  >   saved backup bundle to \$TESTTMP/*.hg (glob)
  > EOF
  $ echo 'y' | rt -i 2>&1
  running 2 tests using 1 parallel processes 
  
  --- $TESTTMP/test-failure.t
  +++ $TESTTMP/test-failure.t.err
  @@ -1,5 +1,5 @@
     $ echo babar
  -  rataxes
  +  babar
   This is a noop statement so that
   this test is still more bytes than success.
   pad pad pad pad............................................................
  @@ -11,6 +11,6 @@
     $ echo 'saved backup bundle to $TESTTMP/foo.hg'
     saved backup bundle to $TESTTMP/foo.hg
     $ echo 'saved backup bundle to $TESTTMP/foo.hg'
  -  saved backup bundle to $TESTTMP\foo.hg
  +  saved backup bundle to $TESTTMP/foo.hg
     $ echo 'saved backup bundle to $TESTTMP/foo.hg'
     saved backup bundle to $TESTTMP/*.hg (glob)
  Accept this change? [y/N] ..
  # Ran 2 tests, 0 skipped, 0 failed.

  $ sed -e 's,(glob)$,&<,g' test-failure.t
    $ echo babar
    babar
  This is a noop statement so that
  this test is still more bytes than success.
  pad pad pad pad............................................................
  pad pad pad pad............................................................
  pad pad pad pad............................................................
  pad pad pad pad............................................................
  pad pad pad pad............................................................
  pad pad pad pad............................................................
    $ echo 'saved backup bundle to $TESTTMP/foo.hg'
    saved backup bundle to $TESTTMP/foo.hg
    $ echo 'saved backup bundle to $TESTTMP/foo.hg'
    saved backup bundle to $TESTTMP/foo.hg
    $ echo 'saved backup bundle to $TESTTMP/foo.hg'
    saved backup bundle to $TESTTMP/*.hg (glob)<

  $ rm test-failure.t

Race condition - test file was modified when test is running

  $ TESTRACEDIR=`pwd`
  $ export TESTRACEDIR
  $ cat > test-race.t <<EOF
  >   $ echo 1
  >   $ echo "# a new line" >> $TESTRACEDIR/test-race.t
  > EOF

  $ rt -i test-race.t
  running 1 tests using 1 parallel processes 
  
  --- $TESTTMP/test-race.t
  +++ $TESTTMP/test-race.t.err
  @@ -1,2 +1,3 @@
     $ echo 1
  +  1
     $ echo "# a new line" >> $TESTTMP/test-race.t
  Reference output has changed (run again to prompt changes)
  ERROR: test-race.t output changed
  !
  Failed test-race.t: output changed
  # Ran 1 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

  $ rm test-race.t

When "#testcases" is used in .t files

  $ cat >> test-cases.t <<EOF
  > #testcases a b
  > #if a
  >   $ echo 1
  > #endif
  > #if b
  >   $ echo 2
  > #endif
  > EOF

  $ cat <<EOF | rt -i test-cases.t 2>&1
  > y
  > y
  > EOF
  running 2 tests using 1 parallel processes 
  
  --- $TESTTMP/test-cases.t
  +++ $TESTTMP/test-cases.t#a.err
  @@ -1,6 +1,7 @@
   #testcases a b
   #if a
     $ echo 1
  +  1
   #endif
   #if b
     $ echo 2
  Accept this change? [y/N] .
  --- $TESTTMP/test-cases.t
  +++ $TESTTMP/test-cases.t#b.err
  @@ -5,4 +5,5 @@
   #endif
   #if b
     $ echo 2
  +  2
   #endif
  Accept this change? [y/N] .
  # Ran 2 tests, 0 skipped, 0 failed.

  $ cat test-cases.t
  #testcases a b
  #if a
    $ echo 1
    1
  #endif
  #if b
    $ echo 2
    2
  #endif

  $ cat >> test-cases.t <<'EOF'
  > #if a
  >   $ NAME=A
  > #else
  >   $ NAME=B
  > #endif
  >   $ echo $NAME
  >   A (a !)
  >   B (b !)
  > EOF
  $ rt test-cases.t
  running 2 tests using 1 parallel processes 
  ..
  # Ran 2 tests, 0 skipped, 0 failed.

When using multiple dimensions of "#testcases" in .t files

  $ cat > test-cases.t <<'EOF'
  > #testcases a b
  > #testcases c d
  > #if a d
  >   $ echo $TESTCASE
  >   a#d
  > #endif
  > #if b c
  >   $ echo yes
  >   no
  > #endif
  > EOF
  $ rt test-cases.t
  running 4 tests using 1 parallel processes 
  ..
  --- $TESTTMP/test-cases.t
  +++ $TESTTMP/test-cases.t#b#c.err
  @@ -6,5 +6,5 @@
   #endif
   #if b c
     $ echo yes
  -  no
  +  yes
   #endif
  
  ERROR: test-cases.t#b#c output changed
  !.
  Failed test-cases.t#b#c: output changed
  # Ran 4 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

  $ rt --retest
  running 1 tests using 1 parallel processes 
  
  --- $TESTTMP/test-cases.t
  +++ $TESTTMP/test-cases.t#b#c.err
  @@ -6,5 +6,5 @@
   #endif
   #if b c
     $ echo yes
  -  no
  +  yes
   #endif
  
  ERROR: test-cases.t#b#c output changed
  !
  Failed test-cases.t#b#c: output changed
  # Ran 1 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]
  $ rm test-cases.t#b#c.err
  $ rm test-cases.t

(reinstall)
  $ mv backup test-failure.t

No Diff
===============

  $ rt --nodiff
  running 2 tests using 1 parallel processes 
  !.
  Failed test-failure.t: output changed
  # Ran 2 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

test --tmpdir support
  $ rt --tmpdir=$TESTTMP/keep test-success.t
  running 1 tests using 1 parallel processes 
  
  Keeping testtmp dir: $TESTTMP/keep/child1/test-success.t
  Keeping threadtmp dir: $TESTTMP/keep/child1 
  .
  # Ran 1 tests, 0 skipped, 0 failed.

timeouts
========
  $ cat > test-timeout.t <<EOF
  >   $ sleep 2
  >   $ echo pass
  >   pass
  > EOF
  > echo '#require slow' > test-slow-timeout.t
  > cat test-timeout.t >> test-slow-timeout.t
  $ rt --timeout=1 --slowtimeout=3 test-timeout.t test-slow-timeout.t
  running 2 tests using 1 parallel processes 
  st
  Skipped test-slow-timeout.t: missing feature: allow slow tests (use --allow-slow-tests)
  Failed test-timeout.t: timed out
  # Ran 1 tests, 1 skipped, 1 failed.
  python hash seed: * (glob)
  [1]
  $ rt --timeout=1 --slowtimeout=3 \
  > test-timeout.t test-slow-timeout.t --allow-slow-tests
  running 2 tests using 1 parallel processes 
  .t
  Failed test-timeout.t: timed out
  # Ran 2 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]
  $ rm test-timeout.t test-slow-timeout.t

test for --time
==================

  $ rt test-success.t --time
  running 1 tests using 1 parallel processes 
  .
  # Ran 1 tests, 0 skipped, 0 failed.
  # Producing time report
  start   end     cuser   csys    real      Test
  \s*[\d\.]{5,8} \s*[\d\.]{5,8} \s*[\d\.]{5,8} \s*[\d\.]{5,8} \s*[\d\.]{5,8}   test-success.t (re)

test for --time with --job enabled
====================================

  $ rt test-success.t --time --jobs 2
  running 1 tests using 1 parallel processes 
  .
  # Ran 1 tests, 0 skipped, 0 failed.
  # Producing time report
  start   end     cuser   csys    real      Test
  \s*[\d\.]{5,8} \s*[\d\.]{5,8} \s*[\d\.]{5,8} \s*[\d\.]{5,8} \s*[\d\.]{5,8}   test-success.t (re)

Skips
================
  $ cat > test-skip.t <<EOF
  >   $ echo xyzzy
  > #if true
  > #require false
  > #end
  > EOF
  $ cat > test-noskip.t <<EOF
  > #if false
  > #require false
  > #endif
  > EOF
  $ rt --nodiff
  running 4 tests using 1 parallel processes 
  !.s.
  Skipped test-skip.t: missing feature: nail clipper
  Failed test-failure.t: output changed
  # Ran 3 tests, 1 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

  $ rm test-noskip.t
  $ rt --keyword xyzzy
  running 3 tests using 1 parallel processes 
  .s
  Skipped test-skip.t: missing feature: nail clipper
  # Ran 2 tests, 2 skipped, 0 failed.

Skips with xml
  $ rt --keyword xyzzy \
  >  --xunit=xunit.xml
  running 3 tests using 1 parallel processes 
  .s
  Skipped test-skip.t: missing feature: nail clipper
  # Ran 2 tests, 2 skipped, 0 failed.
  $ cat xunit.xml
  <?xml version="1.0" encoding="utf-8"?>
  <testsuite errors="0" failures="0" name="run-tests" skipped="2" tests="2">
    <testcase name="test-success.t" time="*"/> (glob)
    <testcase name="test-skip.t">
      <skipped><![CDATA[missing feature: nail clipper]]></skipped> (py38 !)
      <skipped> (no-py38 !)
  <![CDATA[missing feature: nail clipper]]>    </skipped> (no-py38 !)
    </testcase>
  </testsuite>

Missing skips or blacklisted skips don't count as executed:
  $ mkdir tests
  $ echo tests/test-failure.t > blacklist
  $ cp test-failure.t tests
  $ rt --blacklist=blacklist --json\
  >   tests/test-failure.t tests/test-bogus.t
  running 2 tests using 1 parallel processes 
  ss
  Skipped test-bogus.t: Doesn't exist
  Skipped test-failure.t: blacklisted
  # Ran 0 tests, 2 skipped, 0 failed.
  $ cat tests/report.json
  testreport ={
      "test-bogus.t": {
          "result": "skip"
      },
      "test-failure.t": {
          "result": "skip"
      }
  } (no-eol)
  $ rm -r tests
  $ echo test-failure.t > blacklist

Whitelist trumps blacklist
  $ echo test-failure.t > whitelist
  $ rt --blacklist=blacklist --whitelist=whitelist --json\
  >   test-failure.t test-bogus.t
  running 2 tests using 1 parallel processes 
  s
  --- $TESTTMP/test-failure.t
  +++ $TESTTMP/test-failure.t.err
  @@ -1,5 +1,5 @@
     $ echo babar
  -  rataxes
  +  babar
   This is a noop statement so that
   this test is still more bytes than success.
   pad pad pad pad............................................................
  
  ERROR: test-failure.t output changed
  !
  Skipped test-bogus.t: Doesn't exist
  Failed test-failure.t: output changed
  # Ran 1 tests, 1 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

Ensure that --test-list causes only the tests listed in that file to
be executed.
  $ echo test-success.t >> onlytest
  $ rt --test-list=onlytest
  running 1 tests using 1 parallel processes 
  .
  # Ran 1 tests, 0 skipped, 0 failed.
  $ echo test-bogus.t >> anothertest
  $ rt --test-list=onlytest --test-list=anothertest
  running 2 tests using 1 parallel processes 
  s.
  Skipped test-bogus.t: Doesn't exist
  # Ran 1 tests, 1 skipped, 0 failed.
  $ rm onlytest anothertest

test for --json
==================

  $ rt --json
  running 3 tests using 1 parallel processes 
  
  --- $TESTTMP/test-failure.t
  +++ $TESTTMP/test-failure.t.err
  @@ -1,5 +1,5 @@
     $ echo babar
  -  rataxes
  +  babar
   This is a noop statement so that
   this test is still more bytes than success.
   pad pad pad pad............................................................
  
  ERROR: test-failure.t output changed
  !.s
  Skipped test-skip.t: missing feature: nail clipper
  Failed test-failure.t: output changed
  # Ran 2 tests, 1 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

  $ cat report.json
  testreport ={
      "test-failure.t": [\{] (re)
          "csys": "\s*\d+\.\d{3,4}", ? (re)
          "cuser": "\s*\d+\.\d{3,4}", ? (re)
          "diff": "---.+\+\+\+.+", ? (re)
          "end": "\s*\d+\.\d{3,4}", ? (re)
          "result": "failure", ? (re)
          "start": "\s*\d+\.\d{3,4}", ? (re)
          "time": "\s*\d+\.\d{3,4}" (re)
      }, ? (re)
      "test-skip.t": {
          "csys": "\s*\d+\.\d{3,4}", ? (re)
          "cuser": "\s*\d+\.\d{3,4}", ? (re)
          "diff": "", ? (re)
          "end": "\s*\d+\.\d{3,4}", ? (re)
          "result": "skip", ? (re)
          "start": "\s*\d+\.\d{3,4}", ? (re)
          "time": "\s*\d+\.\d{3,4}" (re)
      }, ? (re)
      "test-success.t": [\{] (re)
          "csys": "\s*\d+\.\d{3,4}", ? (re)
          "cuser": "\s*\d+\.\d{3,4}", ? (re)
          "diff": "", ? (re)
          "end": "\s*\d+\.\d{3,4}", ? (re)
          "result": "success", ? (re)
          "start": "\s*\d+\.\d{3,4}", ? (re)
          "time": "\s*\d+\.\d{3,4}" (re)
      }
  } (no-eol)
--json with --outputdir

  $ rm report.json
  $ rm -r output
  $ mkdir output
  $ rt --json --outputdir output
  running 3 tests using 1 parallel processes 
  
  --- $TESTTMP/test-failure.t
  +++ $TESTTMP/output/test-failure.t.err
  @@ -1,5 +1,5 @@
     $ echo babar
  -  rataxes
  +  babar
   This is a noop statement so that
   this test is still more bytes than success.
   pad pad pad pad............................................................
  
  ERROR: test-failure.t output changed
  !.s
  Skipped test-skip.t: missing feature: nail clipper
  Failed test-failure.t: output changed
  # Ran 2 tests, 1 skipped, 1 failed.
  python hash seed: * (glob)
  [1]
  $ f report.json
  report.json: file not found
  $ cat output/report.json
  testreport ={
      "test-failure.t": [\{] (re)
          "csys": "\s*\d+\.\d{3,4}", ? (re)
          "cuser": "\s*\d+\.\d{3,4}", ? (re)
          "diff": "---.+\+\+\+.+", ? (re)
          "end": "\s*\d+\.\d{3,4}", ? (re)
          "result": "failure", ? (re)
          "start": "\s*\d+\.\d{3,4}", ? (re)
          "time": "\s*\d+\.\d{3,4}" (re)
      }, ? (re)
      "test-skip.t": {
          "csys": "\s*\d+\.\d{3,4}", ? (re)
          "cuser": "\s*\d+\.\d{3,4}", ? (re)
          "diff": "", ? (re)
          "end": "\s*\d+\.\d{3,4}", ? (re)
          "result": "skip", ? (re)
          "start": "\s*\d+\.\d{3,4}", ? (re)
          "time": "\s*\d+\.\d{3,4}" (re)
      }, ? (re)
      "test-success.t": [\{] (re)
          "csys": "\s*\d+\.\d{3,4}", ? (re)
          "cuser": "\s*\d+\.\d{3,4}", ? (re)
          "diff": "", ? (re)
          "end": "\s*\d+\.\d{3,4}", ? (re)
          "result": "success", ? (re)
          "start": "\s*\d+\.\d{3,4}", ? (re)
          "time": "\s*\d+\.\d{3,4}" (re)
      }
  } (no-eol)
  $ ls -a output
  .
  ..
  .testtimes
  report.json
  test-failure.t.err

Test that failed test accepted through interactive are properly reported:

  $ cp test-failure.t backup
  $ echo y | rt --json -i
  running 3 tests using 1 parallel processes 
  
  --- $TESTTMP/test-failure.t
  +++ $TESTTMP/test-failure.t.err
  @@ -1,5 +1,5 @@
     $ echo babar
  -  rataxes
  +  babar
   This is a noop statement so that
   this test is still more bytes than success.
   pad pad pad pad............................................................
  Accept this change? [y/N] ..s
  Skipped test-skip.t: missing feature: nail clipper
  # Ran 2 tests, 1 skipped, 0 failed.

  $ cat report.json
  testreport ={
      "test-failure.t": [\{] (re)
          "csys": "\s*\d+\.\d{3,4}", ? (re)
          "cuser": "\s*\d+\.\d{3,4}", ? (re)
          "diff": "", ? (re)
          "end": "\s*\d+\.\d{3,4}", ? (re)
          "result": "success", ? (re)
          "start": "\s*\d+\.\d{3,4}", ? (re)
          "time": "\s*\d+\.\d{3,4}" (re)
      }, ? (re)
      "test-skip.t": {
          "csys": "\s*\d+\.\d{3,4}", ? (re)
          "cuser": "\s*\d+\.\d{3,4}", ? (re)
          "diff": "", ? (re)
          "end": "\s*\d+\.\d{3,4}", ? (re)
          "result": "skip", ? (re)
          "start": "\s*\d+\.\d{3,4}", ? (re)
          "time": "\s*\d+\.\d{3,4}" (re)
      }, ? (re)
      "test-success.t": [\{] (re)
          "csys": "\s*\d+\.\d{3,4}", ? (re)
          "cuser": "\s*\d+\.\d{3,4}", ? (re)
          "diff": "", ? (re)
          "end": "\s*\d+\.\d{3,4}", ? (re)
          "result": "success", ? (re)
          "start": "\s*\d+\.\d{3,4}", ? (re)
          "time": "\s*\d+\.\d{3,4}" (re)
      }
  } (no-eol)
  $ mv backup test-failure.t

backslash on end of line with glob matching is handled properly

  $ cat > test-glob-backslash.t << EOF
  >   $ echo 'foo bar \\'
  >   foo * \ (glob)
  > EOF

  $ rt test-glob-backslash.t
  running 1 tests using 1 parallel processes 
  .
  # Ran 1 tests, 0 skipped, 0 failed.

  $ rm -f test-glob-backslash.t

Test globbing of local IP addresses
  $ echo 172.16.18.1
  $LOCALIP (glob)
  $ echo dead:beef::1
  $LOCALIP (glob)

Add support for external test formatter
=======================================

  $ CUSTOM_TEST_RESULT=basic_test_result "$PYTHON" $TESTDIR/run-tests.py --with-hg=$HGTEST_REAL_HG -j1 "$@" test-success.t test-failure.t
  running 2 tests using 1 parallel processes 
  
  # Ran 2 tests, 0 skipped, 0 failed.
  ON_START! <__main__.TestSuite tests=[<__main__.TTest testMethod=test-failure.t>, <__main__.TTest testMethod=test-success.t>]>
  FAILURE! test-failure.t output changed
  SUCCESS! test-success.t
  ON_END!

Test reusability for third party tools
======================================

  $ THISTESTDIR="$TESTDIR"
  $ export THISTESTDIR
  $ THISTESTTMP="$TESTTMP"
  $ export THISTESTTMP

#if windows

  $ NEWTESTDIR="$THISTESTTMP"\\anothertests

#else

  $ NEWTESTDIR="$THISTESTTMP"/anothertests

#endif

  $ export NEWTESTDIR

  $ echo creating some new test in: $NEWTESTDIR
  creating some new test in: $TESTTMP\anothertests (windows !)
  creating some new test in: $TESTTMP/anothertests (no-windows !)
  $ mkdir "$NEWTESTDIR"
  $ cd "$NEWTESTDIR"

test that `run-tests.py` can execute hghave, even if it runs not in
Mercurial source tree.

  $ cat > test-hghave.t <<EOF
  > #require true
  >   $ echo foo
  >   foo
  > EOF
  $ rt test-hghave.t
  running 1 tests using 1 parallel processes 
  .
  # Ran 1 tests, 0 skipped, 0 failed.

test that RUNTESTDIR refers the directory, in which `run-tests.py` now
running is placed.


  $ cat > test-runtestdir.t <<EOF
  > # \$THISTESTDIR, in which test-run-tests.t (this test file) is placed
  > # \$THISTESTTMP, in which test-run-tests.t (this test file) is placed
  > # \$TESTDIR, in which test-runtestdir.t is placed (expanded at runtime)
  > # \$RUNTESTDIR, in which run-tests.py is placed (expanded at runtime)
  > 
  >   $ test "\$TESTDIR" = "\$NEWTESTDIR"
  > If this prints a path, that means RUNTESTDIR didn't equal
  > THISTESTDIR as it should have.
  >   $ test "\$RUNTESTDIR" = "\$THISTESTDIR" || echo "\$RUNTESTDIR"
  > This should print the start of check-code. If this passes but the
  > previous check failed, that means we found a copy of check-code at whatever
  > RUNTESTSDIR ended up containing, even though it doesn't match THISTESTDIR.
  >   $ head -n 3 "\$RUNTESTDIR"/../contrib/check-code.py | sed 's@.!.*python3@#!USRBINENVPY@'
  >   #!USRBINENVPY
  >   #
  >   # check-code - a style and portability checker for Mercurial
  > EOF
  $ rt test-runtestdir.t
  running 1 tests using 1 parallel processes 
  .
  # Ran 1 tests, 0 skipped, 0 failed.

#if execbit

test that TESTDIR is referred in PATH

  $ cat > custom-command.sh <<EOF
  > #!/bin/sh
  > echo "hello world"
  > EOF
  $ chmod +x custom-command.sh
  $ cat > test-testdir-path.t <<EOF
  >   $ custom-command.sh
  >   hello world
  > EOF
  $ rt test-testdir-path.t
  running 1 tests using 1 parallel processes 
  .
  # Ran 1 tests, 0 skipped, 0 failed.

#endif

test support for --allow-slow-tests
  $ cat > test-very-slow-test.t <<EOF
  > #require slow
  >   $ echo pass
  >   pass
  > EOF
  $ rt test-very-slow-test.t
  running 1 tests using 1 parallel processes 
  s
  Skipped test-very-slow-test.t: missing feature: allow slow tests (use --allow-slow-tests)
  # Ran 0 tests, 1 skipped, 0 failed.
  $ rt $HGTEST_RUN_TESTS_PURE --allow-slow-tests test-very-slow-test.t
  running 1 tests using 1 parallel processes 
  .
  # Ran 1 tests, 0 skipped, 0 failed.

support for running a test outside the current directory
  $ mkdir nonlocal
  $ cat > nonlocal/test-is-not-here.t << EOF
  >   $ echo pass
  >   pass
  > EOF
  $ rt nonlocal/test-is-not-here.t
  running 1 tests using 1 parallel processes 
  .
  # Ran 1 tests, 0 skipped, 0 failed.

support for automatically discovering test if arg is a folder
  $ mkdir tmp && cd tmp

  $ cat > test-uno.t << EOF
  >   $ echo line
  >   line
  > EOF

  $ cp test-uno.t test-dos.t
  $ cd ..
  $ cp -R tmp tmpp
  $ cp tmp/test-uno.t test-solo.t

  $ rt tmp/ test-solo.t tmpp
  running 5 tests using 1 parallel processes 
  .....
  # Ran 5 tests, 0 skipped, 0 failed.
  $ rm -rf tmp tmpp

support for running run-tests.py from another directory
  $ mkdir tmp && cd tmp

  $ cat > useful-file.sh << EOF
  > important command
  > EOF

  $ cat > test-folder.t << EOF
  >   $ cat \$TESTDIR/useful-file.sh
  >   important command
  > EOF

  $ cat > test-folder-fail.t << EOF
  >   $ cat \$TESTDIR/useful-file.sh
  >   important commando
  > EOF

  $ cd ..
  $ rt tmp/test-*.t
  running 2 tests using 1 parallel processes 
  
  --- $TESTTMP/anothertests/tmp/test-folder-fail.t
  +++ $TESTTMP/anothertests/tmp/test-folder-fail.t.err
  @@ -1,2 +1,2 @@
     $ cat $TESTDIR/useful-file.sh
  -  important commando
  +  important command
  
  ERROR: test-folder-fail.t output changed
  !.
  Failed test-folder-fail.t: output changed
  # Ran 2 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

support for bisecting failed tests automatically
  $ hg init bisect
  $ cd bisect
  $ cat >> test-bisect.t <<EOF
  >   $ echo pass
  >   pass
  > EOF
  $ hg add test-bisect.t
  $ hg ci -m 'good'
  $ cat >> test-bisect.t <<EOF
  >   $ echo pass
  >   fail
  > EOF
  $ hg ci -m 'bad'
  $ rt --known-good-rev=0 test-bisect.t
  running 1 tests using 1 parallel processes 
  
  --- $TESTTMP/anothertests/bisect/test-bisect.t
  +++ $TESTTMP/anothertests/bisect/test-bisect.t.err
  @@ -1,4 +1,4 @@
     $ echo pass
     pass
     $ echo pass
  -  fail
  +  pass
  
  ERROR: test-bisect.t output changed
  !
  Failed test-bisect.t: output changed
  test-bisect.t broken by 72cbf122d116 (bad)
  # Ran 1 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

  $ cd ..

support bisecting a separate repo

  $ hg init bisect-dependent
  $ cd bisect-dependent
  $ cat > test-bisect-dependent.t <<EOF
  >   $ tail -1 \$TESTDIR/../bisect/test-bisect.t
  >     pass
  > EOF
  $ hg commit -Am dependent test-bisect-dependent.t

  $ rt --known-good-rev=0 test-bisect-dependent.t
  running 1 tests using 1 parallel processes 
  
  --- $TESTTMP/anothertests/bisect-dependent/test-bisect-dependent.t
  +++ $TESTTMP/anothertests/bisect-dependent/test-bisect-dependent.t.err
  @@ -1,2 +1,2 @@
     $ tail -1 $TESTDIR/../bisect/test-bisect.t
  -    pass
  +    fail
  
  ERROR: test-bisect-dependent.t output changed
  !
  Failed test-bisect-dependent.t: output changed
  Failed to identify failure point for test-bisect-dependent.t
  # Ran 1 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

  $ rt --bisect-repo=../test-bisect test-bisect-dependent.t
  usage: run-tests.py [options] [tests]
  run-tests.py: error: --bisect-repo cannot be used without --known-good-rev
  [2]

  $ rt --known-good-rev=0 --bisect-repo=../bisect test-bisect-dependent.t
  running 1 tests using 1 parallel processes 
  
  --- $TESTTMP/anothertests/bisect-dependent/test-bisect-dependent.t
  +++ $TESTTMP/anothertests/bisect-dependent/test-bisect-dependent.t.err
  @@ -1,2 +1,2 @@
     $ tail -1 $TESTDIR/../bisect/test-bisect.t
  -    pass
  +    fail
  
  ERROR: test-bisect-dependent.t output changed
  !
  Failed test-bisect-dependent.t: output changed
  test-bisect-dependent.t broken by 72cbf122d116 (bad)
  # Ran 1 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

  $ cd ..

Test a broken #if statement doesn't break run-tests threading.
==============================================================
  $ mkdir broken
  $ cd broken
  $ cat > test-broken.t <<EOF
  > true
  > #if notarealhghavefeature
  >   $ false
  > #endif
  > EOF
  $ for f in 1 2 3 4 ; do
  > cat > test-works-$f.t <<EOF
  > This is test case $f
  >   $ sleep 1
  > EOF
  > done
  $ rt -j 2
  running 5 tests using 2 parallel processes 
  ....
  # Ran 5 tests, 0 skipped, 0 failed.
  skipped: unknown feature: notarealhghavefeature
  
  $ cd ..
  $ rm -rf broken

Test cases in .t files
======================
  $ mkdir cases
  $ cd cases
  $ cat > test-cases-abc.t <<'EOF'
  > #testcases A B C
  >   $ V=B
  > #if A
  >   $ V=A
  > #endif
  > #if C
  >   $ V=C
  > #endif
  >   $ echo $V | sed 's/A/C/'
  >   C
  > #if C
  >   $ [ $V = C ]
  > #endif
  > #if A
  >   $ [ $V = C ]
  >   [1]
  > #endif
  > #if no-C
  >   $ [ $V = C ]
  >   [1]
  > #endif
  >   $ [ $V = D ]
  >   [1]
  > EOF
  $ rt
  running 3 tests using 1 parallel processes 
  .
  --- $TESTTMP/anothertests/cases/test-cases-abc.t
  +++ $TESTTMP/anothertests/cases/test-cases-abc.t#B.err
  @@ -7,7 +7,7 @@
     $ V=C
   #endif
     $ echo $V | sed 's/A/C/'
  -  C
  +  B
   #if C
     $ [ $V = C ]
   #endif
  
  ERROR: test-cases-abc.t#B output changed
  !.
  Failed test-cases-abc.t#B: output changed
  # Ran 3 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

--restart works

  $ rt --restart
  running 2 tests using 1 parallel processes 
  
  --- $TESTTMP/anothertests/cases/test-cases-abc.t
  +++ $TESTTMP/anothertests/cases/test-cases-abc.t#B.err
  @@ -7,7 +7,7 @@
     $ V=C
   #endif
     $ echo $V | sed 's/A/C/'
  -  C
  +  B
   #if C
     $ [ $V = C ]
   #endif
  
  ERROR: test-cases-abc.t#B output changed
  !.
  Failed test-cases-abc.t#B: output changed
  # Ran 2 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

--restart works with outputdir

  $ mkdir output
  $ mv test-cases-abc.t#B.err output
  $ rt --restart --outputdir output
  running 2 tests using 1 parallel processes 
  
  --- $TESTTMP/anothertests/cases/test-cases-abc.t
  +++ $TESTTMP/anothertests/cases/output/test-cases-abc.t#B.err
  @@ -7,7 +7,7 @@
     $ V=C
   #endif
     $ echo $V | sed 's/A/C/'
  -  C
  +  B
   #if C
     $ [ $V = C ]
   #endif
  
  ERROR: test-cases-abc.t#B output changed
  !.
  Failed test-cases-abc.t#B: output changed
  # Ran 2 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

Test TESTCASE variable

  $ cat > test-cases-ab.t <<'EOF'
  >   $ dostuff() {
  >   >   echo "In case $TESTCASE"
  >   > }
  > #testcases A B
  > #if A
  >   $ dostuff
  >   In case A
  > #endif
  > #if B
  >   $ dostuff
  >   In case B
  > #endif
  > EOF
  $ rt test-cases-ab.t
  running 2 tests using 1 parallel processes 
  ..
  # Ran 2 tests, 0 skipped, 0 failed.

Support running a specific test case

  $ rt "test-cases-abc.t#B"
  running 1 tests using 1 parallel processes 
  
  --- $TESTTMP/anothertests/cases/test-cases-abc.t
  +++ $TESTTMP/anothertests/cases/test-cases-abc.t#B.err
  @@ -7,7 +7,7 @@
     $ V=C
   #endif
     $ echo $V | sed 's/A/C/'
  -  C
  +  B
   #if C
     $ [ $V = C ]
   #endif
  
  ERROR: test-cases-abc.t#B output changed
  !
  Failed test-cases-abc.t#B: output changed
  # Ran 1 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

Support running multiple test cases in the same file

  $ rt test-cases-abc.t#B test-cases-abc.t#C
  running 2 tests using 1 parallel processes 
  
  --- $TESTTMP/anothertests/cases/test-cases-abc.t
  +++ $TESTTMP/anothertests/cases/test-cases-abc.t#B.err
  @@ -7,7 +7,7 @@
     $ V=C
   #endif
     $ echo $V | sed 's/A/C/'
  -  C
  +  B
   #if C
     $ [ $V = C ]
   #endif
  
  ERROR: test-cases-abc.t#B output changed
  !.
  Failed test-cases-abc.t#B: output changed
  # Ran 2 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

Support ignoring invalid test cases

  $ rt test-cases-abc.t#B test-cases-abc.t#D
  running 1 tests using 1 parallel processes 
  
  --- $TESTTMP/anothertests/cases/test-cases-abc.t
  +++ $TESTTMP/anothertests/cases/test-cases-abc.t#B.err
  @@ -7,7 +7,7 @@
     $ V=C
   #endif
     $ echo $V | sed 's/A/C/'
  -  C
  +  B
   #if C
     $ [ $V = C ]
   #endif
  
  ERROR: test-cases-abc.t#B output changed
  !
  Failed test-cases-abc.t#B: output changed
  # Ran 1 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

Support running complex test cases names

  $ cat > test-cases-advanced-cases.t <<'EOF'
  > #testcases simple case-with-dashes casewith_-.chars
  >   $ echo $TESTCASE
  >   simple
  > EOF

  $ cat test-cases-advanced-cases.t
  #testcases simple case-with-dashes casewith_-.chars
    $ echo $TESTCASE
    simple

  $ rt test-cases-advanced-cases.t
  running 3 tests using 1 parallel processes 
  
  --- $TESTTMP/anothertests/cases/test-cases-advanced-cases.t
  +++ $TESTTMP/anothertests/cases/test-cases-advanced-cases.t#case-with-dashes.err
  @@ -1,3 +1,3 @@
   #testcases simple case-with-dashes casewith_-.chars
     $ echo $TESTCASE
  -  simple
  +  case-with-dashes
  
  ERROR: test-cases-advanced-cases.t#case-with-dashes output changed
  !
  --- $TESTTMP/anothertests/cases/test-cases-advanced-cases.t
  +++ $TESTTMP/anothertests/cases/test-cases-advanced-cases.t#casewith_-.chars.err
  @@ -1,3 +1,3 @@
   #testcases simple case-with-dashes casewith_-.chars
     $ echo $TESTCASE
  -  simple
  +  casewith_-.chars
  
  ERROR: test-cases-advanced-cases.t#casewith_-.chars output changed
  !.
  Failed test-cases-advanced-cases.t#case-with-dashes: output changed
  Failed test-cases-advanced-cases.t#casewith_-.chars: output changed
  # Ran 3 tests, 0 skipped, 2 failed.
  python hash seed: * (glob)
  [1]

  $ rt "test-cases-advanced-cases.t#case-with-dashes"
  running 1 tests using 1 parallel processes 
  
  --- $TESTTMP/anothertests/cases/test-cases-advanced-cases.t
  +++ $TESTTMP/anothertests/cases/test-cases-advanced-cases.t#case-with-dashes.err
  @@ -1,3 +1,3 @@
   #testcases simple case-with-dashes casewith_-.chars
     $ echo $TESTCASE
  -  simple
  +  case-with-dashes
  
  ERROR: test-cases-advanced-cases.t#case-with-dashes output changed
  !
  Failed test-cases-advanced-cases.t#case-with-dashes: output changed
  # Ran 1 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

  $ rt "test-cases-advanced-cases.t#casewith_-.chars"
  running 1 tests using 1 parallel processes 
  
  --- $TESTTMP/anothertests/cases/test-cases-advanced-cases.t
  +++ $TESTTMP/anothertests/cases/test-cases-advanced-cases.t#casewith_-.chars.err
  @@ -1,3 +1,3 @@
   #testcases simple case-with-dashes casewith_-.chars
     $ echo $TESTCASE
  -  simple
  +  casewith_-.chars
  
  ERROR: test-cases-advanced-cases.t#casewith_-.chars output changed
  !
  Failed test-cases-advanced-cases.t#casewith_-.chars: output changed
  # Ran 1 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

Test automatic pattern replacement
==================================

  $ cat << EOF >> common-pattern.py
  > substitutions = [
  >     (br'foo-(.*)\\b',
  >      br'\$XXX=\\1\$'),
  >     (br'bar\\n',
  >      br'\$YYY$\\n'),
  > ]
  > EOF

  $ cat << EOF >> test-substitution.t
  >   $ echo foo-12
  >   \$XXX=12$
  >   $ echo foo-42
  >   \$XXX=42$
  >   $ echo bar prior
  >   bar prior
  >   $ echo lastbar
  >   last\$YYY$
  >   $ echo foo-bar foo-baz
  > EOF

  $ rt test-substitution.t
  running 1 tests using 1 parallel processes 
  
  --- $TESTTMP/anothertests/cases/test-substitution.t
  +++ $TESTTMP/anothertests/cases/test-substitution.t.err
  @@ -7,3 +7,4 @@
     $ echo lastbar
     last$YYY$
     $ echo foo-bar foo-baz
  +  $XXX=bar foo-baz$
  
  ERROR: test-substitution.t output changed
  !
  Failed test-substitution.t: output changed
  # Ran 1 tests, 0 skipped, 1 failed.
  python hash seed: * (glob)
  [1]

--extra-config-opt works

  $ cat << EOF >> test-config-opt.t
  >   $ hg init test-config-opt
  >   $ hg -R test-config-opt purge
  >   $ echo "HGTESTEXTRAEXTENSIONS: \$HGTESTEXTRAEXTENSIONS"
  >   HGTESTEXTRAEXTENSIONS: purge
  > EOF

  $ rt --extra-config-opt extensions.purge= \
  >    --extra-config-opt not.an.extension=True test-config-opt.t
  running 1 tests using 1 parallel processes 
  .
  # Ran 1 tests, 0 skipped, 0 failed.

Test conditional output matching
================================

  $ cat << EOF >> test-conditional-matching.t
  > #testcases foo bar
  >   $ echo richtig
  >   richtig (true !)
  >   $ echo falsch
  >   falsch (false !)
  > #if foo
  >   $ echo arthur
  >   arthur (bar !)
  > #endif
  >   $ echo celeste
  >   celeste (foo !)
  >   $ echo zephir
  >   zephir (bar !)
  > EOF

  $ rt test-conditional-matching.t
  running 2 tests using 1 parallel processes 
  
  --- $TESTTMP/anothertests/cases/test-conditional-matching.t
  +++ $TESTTMP/anothertests/cases/test-conditional-matching.t#bar.err
  @@ -3,11 +3,13 @@
     richtig (true !)
     $ echo falsch
     falsch (false !)
  +  falsch
   #if foo
     $ echo arthur
     arthur \(bar !\) (re)
   #endif
     $ echo celeste
     celeste \(foo !\) (re)
  +  celeste
     $ echo zephir
     zephir \(bar !\) (re)
  
  ERROR: test-conditional-matching.t#bar output changed
  !
  --- $TESTTMP/anothertests/cases/test-conditional-matching.t
  +++ $TESTTMP/anothertests/cases/test-conditional-matching.t#foo.err
  @@ -3,11 +3,14 @@
     richtig (true !)
     $ echo falsch
     falsch (false !)
  +  falsch
   #if foo
     $ echo arthur
     arthur \(bar !\) (re)
  +  arthur
   #endif
     $ echo celeste
     celeste \(foo !\) (re)
     $ echo zephir
     zephir \(bar !\) (re)
  +  zephir
  
  ERROR: test-conditional-matching.t#foo output changed
  !
  Failed test-conditional-matching.t#bar: output changed
  Failed test-conditional-matching.t#foo: output changed
  # Ran 2 tests, 0 skipped, 2 failed.
  python hash seed: * (glob)
  [1]

Test that a proper "python" has been set up
===========================================

(with a small check-code work around)
  $ printf "#!/usr/bi" > test-py3.tmp
  $ printf "n/en" >> test-py3.tmp
  $ cat << EOF >> test-py3.tmp
  > v python3
  > import sys
  > print('.'.join(str(x) for x in sys.version_info))
  > EOF
  $ mv test-py3.tmp test-py3.py
  $ chmod +x test-py3.py

(with a small check-code work around)
  $ printf "#!/usr/bi" > test-py.tmp
  $ printf "n/en" >> test-py.tmp
  $ cat << EOF >> test-py.tmp
  > v python
  > import sys
  > print('.'.join(str(x) for x in sys.version_info))
  > EOF
  $ mv test-py.tmp test-py.py
  $ chmod +x test-py.py

  $ ./test-py3.py
  3.* (glob)
  $ ./test-py.py
  2.* (glob) (no-py3 !)
  3.* (glob) (py3 !)