changeset 20821:3d1d16b19e7d

tests: add run-tests --changed option for running tests changed in revisions

Convenient when polishing patches and changing details of how they change test
output.

This will probably break in weird ways for revsets with special quoting ... but
it is good enough for run-tests.

Usage example:
  yes | ./run-tests.py -li --changed qparent

--- a/tests/run-tests.py	Wed Mar 19 00:18:30 2014 +0100
+++ b/tests/run-tests.py	Fri Feb 28 02:09:00 2014 +0100
@@ -141,6 +141,8 @@
         help="skip tests listed in the specified blacklist file")
     parser.add_option("--whitelist", action="append",
         help="always run tests listed in the specified whitelist file")
+    parser.add_option("--changed", type="string",
+        help="run tests that are changed in parent rev or working directory")
     parser.add_option("-C", "--annotate", action="store_true",
         help="output files annotated with coverage")
     parser.add_option("-c", "--cover", action="store_true",
@@ -1181,7 +1183,13 @@
     checktools()
 
     if not args:
-        args = os.listdir(".")
+        if options.changed:
+            proc = Popen4('hg st --rev "%s" -man0 .' % options.changed,
+                          None, 0)
+            stdout, stderr = proc.communicate()
+            args = stdout.strip('\0').split('\0')
+        else:
+            args = os.listdir(".")
 
     tests = [t for t in args
              if t.startswith("test-")