tests/test-cat.t

color: set _colormode to None when mode is unset (issue3895)

Previously, colorui assumed that it would only be called when mode wasn't
None. 7ae12ce87594 changed that, so now colorui needs to care about whether it
should colorize output.

  $ hg init
  $ echo 0 > a
  $ echo 0 > b
  $ hg ci -A -m m
  adding a
  adding b
  $ hg rm a
  $ hg cat a
  0
  $ hg cat --decode a # more tests in test-encode
  0
  $ echo 1 > b
  $ hg ci -m m
  $ echo 2 > b
  $ hg cat -r 0 a
  0
  $ hg cat -r 0 b
  0
  $ hg cat -r 1 a
  a: no such file in rev 7040230c159c
  [1]
  $ hg cat -r 1 b
  1

Test fileset

  $ echo 3 > c
  $ hg ci -Am addmore c
  $ hg cat 'set:not(b) or a'
  3
  $ hg cat 'set:c or b'
  1
  3