tests: avoid echo with backslash escapes

Some shells' echo (e.g. Bash's) do not interpret backslash escapes by
default, while others shells' do (e.g. Dash's). This led to a failure
in test-run-tests.t. We could switch to the more compatible printf,
but using a heredoc seems simpler, so that's what this patch does.

For anyone who wants to test this for themselves, remove the "unset
HGTEST_SHELL" line in helper-runtests.sh and pass
e.g. "--shell=/bin/dash" to the test runner.

Differential Revision: https://phab.mercurial-scm.org/D1699

tests/test-run-tests.t

@@ -1,1583 +1,1585
 This file tests the behavior of run-tests.py itself.
 
 Avoid interference from actual test env:
 
   $ . "$TESTDIR/helper-runtests.sh"
 
 Smoke test with install
 ============
 
   $ run-tests.py $HGTEST_RUN_TESTS_PURE -l
   
   # Ran 0 tests, 0 skipped, 0 failed.
 
 Define a helper to avoid the install step
 =============
   $ rt()
   > {
   >     run-tests.py --with-hg=`which hg` "$@"
   > }
 
 error paths
 
 #if symlink
   $ ln -s `which true` hg
   $ run-tests.py --with-hg=./hg
   warning: --with-hg should specify an hg script
   
   # Ran 0 tests, 0 skipped, 0 failed.
   $ rm hg
 #endif
 
 #if execbit
   $ touch hg
   $ 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
   .
   # 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
   .
   # 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
   
   --- $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 diff colorisation
 
 #if no-windows pygments
   $ rt test-failure.t --color always
   
   \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
   [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
   
   --- $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
   
   --- $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.t: output changed
   Failed test-failure-unicode.t: output changed
   # Ran 3 tests, 0 skipped, 2 failed.
   python hash seed: * (glob)
   [1]
 
 test --outputdir
   $ mkdir output
   $ rt --outputdir output
   
   --- $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.t: output changed
   Failed test-failure-unicode.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
   
   --- $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.t: output changed
   Failed test-failure-unicode.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
   +++ $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>
     </testcase>
     <testcase name="test-failure.t" time="*"> (glob)
       <failure message="output changed" type="output-mismatch">
   <![CDATA[--- $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............................................................
   ]]>    </failure>
     </testcase>
   </testsuite>
 
   $ cat .testtimes
   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
   
   --- $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]
 
 --retest works with --outputdir
   $ rm -r output
   $ mkdir output
   $ mv test-failure.t.err output
   $ rt --retest --outputdir output
   
   --- $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 2 tests, 1 skipped, 1 failed.
   python hash seed: * (glob)
   [1]
 
 Selecting Tests To Run
 ======================
 
 successful
 
   $ rt test-success.t
   .
   # Ran 1 tests, 0 skipped, 0 failed.
 
 success w/ keyword
   $ rt -k xyzzy
   .
   # Ran 2 tests, 1 skipped, 0 failed.
 
 failed
 
   $ rt test-failure.t
   
   --- $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
   
   --- $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
   
   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
 ===================================
   $ 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
   .
   # Ran 1 tests, 0 skipped, 0 failed.
   $ rm test-serve-inuse.t
   $ killdaemons.py $DAEMON_PIDS
   $ rm $DAEMON_PIDS
 
 Running In Debug Mode
 ======================
 
   $ rt --debug 2>&1 | grep -v pwd
   + 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
   !!
   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
   
   --- $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
 
 
 Interactive run
 ===============
 
 (backup the failing test)
   $ cp test-failure.t backup
 
 Refuse the fix
 
   $ echo 'n' | rt -i
   
   --- $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? [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
   $TESTTMP/test-failure.t $TESTTMP/test-failure.t.err
   Accept this change? [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
   $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
 
-  $ echo "  $ echo 'saved backup bundle to \$TESTTMP/foo.hg'" >> test-failure.t
-  $ echo "  saved backup bundle to \$TESTTMP/foo.hg" >> test-failure.t
-  $ echo "  $ echo 'saved backup bundle to \$TESTTMP/foo.hg'" >> test-failure.t
-  $ echo "  saved backup bundle to \$TESTTMP\\foo.hg" >> test-failure.t
-  $ echo "  $ echo 'saved backup bundle to \$TESTTMP/foo.hg'" >> test-failure.t
-  $ echo "  saved backup bundle to \$TESTTMP/*.hg (glob)" >> test-failure.t
+  $ 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
   
   --- $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? [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)<
 
 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
   
   --- $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
   
   --- $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? [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? [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
   ..
   # Ran 2 tests, 0 skipped, 0 failed.
 
   $ rm test-cases.t
 
 (reinstall)
   $ mv backup test-failure.t
 
 No Diff
 ===============
 
   $ rt --nodiff
   !.
   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
   
   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
   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
   .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
   .
   # Ran 1 tests, 0 skipped, 0 failed.
   # Producing time report
   start   end     cuser   csys    real      Test
   \s*[\d\.]{5}   \s*[\d\.]{5}   \s*[\d\.]{5}   \s*[\d\.]{5}   \s*[\d\.]{5}   test-success.t (re)
 
 test for --time with --job enabled
 ====================================
 
   $ rt test-success.t --time --jobs 2
   .
   # Ran 1 tests, 0 skipped, 0 failed.
   # Producing time report
   start   end     cuser   csys    real      Test
   \s*[\d\.]{5}   \s*[\d\.]{5}   \s*[\d\.]{5}   \s*[\d\.]{5}   \s*[\d\.]{5}   test-success.t (re)
 
 Skips
 ================
   $ cat > test-skip.t <<EOF
   >   $ echo xyzzy
   > #require false
   > EOF
   $ rt --nodiff
   !.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]
 
   $ rt --keyword xyzzy
   .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
   .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>
     </testcase>
   </testsuite>
 
 Missing skips or blacklisted skips don't count as executed:
   $ echo test-failure.t > blacklist
   $ rt --blacklist=blacklist --json\
   >   test-failure.t test-bogus.t
   ss
   Skipped test-bogus.t: Doesn't exist
   Skipped test-failure.t: blacklisted
   # Ran 0 tests, 2 skipped, 0 failed.
   $ cat report.json
   testreport ={
       "test-bogus.t": {
           "result": "skip"
       },
       "test-failure.t": {
           "result": "skip"
       }
   } (no-eol)
 
 Whitelist trumps blacklist
   $ echo test-failure.t > whitelist
   $ rt --blacklist=blacklist --whitelist=whitelist --json\
   >   test-failure.t test-bogus.t
   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
   .
   # Ran 1 tests, 0 skipped, 0 failed.
   $ echo test-bogus.t >> anothertest
   $ rt --test-list=onlytest --test-list=anothertest
   s.
   Skipped test-bogus.t: Doesn't exist
   # Ran 1 tests, 1 skipped, 0 failed.
   $ rm onlytest anothertest
 
 test for --json
 ==================
 
   $ rt --json
   
   --- $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\.]{4,5}", ? (re)
           "cuser": "\s*[\d\.]{4,5}", ? (re)
           "diff": "---.+\+\+\+.+", ? (re)
           "end": "\s*[\d\.]{4,5}", ? (re)
           "result": "failure", ? (re)
           "start": "\s*[\d\.]{4,5}", ? (re)
           "time": "\s*[\d\.]{4,5}" (re)
       }, ? (re)
       "test-skip.t": {
           "csys": "\s*[\d\.]{4,5}", ? (re)
           "cuser": "\s*[\d\.]{4,5}", ? (re)
           "diff": "", ? (re)
           "end": "\s*[\d\.]{4,5}", ? (re)
           "result": "skip", ? (re)
           "start": "\s*[\d\.]{4,5}", ? (re)
           "time": "\s*[\d\.]{4,5}" (re)
       }, ? (re)
       "test-success.t": [\{] (re)
           "csys": "\s*[\d\.]{4,5}", ? (re)
           "cuser": "\s*[\d\.]{4,5}", ? (re)
           "diff": "", ? (re)
           "end": "\s*[\d\.]{4,5}", ? (re)
           "result": "success", ? (re)
           "start": "\s*[\d\.]{4,5}", ? (re)
           "time": "\s*[\d\.]{4,5}" (re)
       }
   } (no-eol)
 --json with --outputdir
 
   $ rm report.json
   $ rm -r output
   $ mkdir output
   $ rt --json --outputdir output
   
   --- $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\.]{4,5}", ? (re)
           "cuser": "\s*[\d\.]{4,5}", ? (re)
           "diff": "---.+\+\+\+.+", ? (re)
           "end": "\s*[\d\.]{4,5}", ? (re)
           "result": "failure", ? (re)
           "start": "\s*[\d\.]{4,5}", ? (re)
           "time": "\s*[\d\.]{4,5}" (re)
       }, ? (re)
       "test-skip.t": {
           "csys": "\s*[\d\.]{4,5}", ? (re)
           "cuser": "\s*[\d\.]{4,5}", ? (re)
           "diff": "", ? (re)
           "end": "\s*[\d\.]{4,5}", ? (re)
           "result": "skip", ? (re)
           "start": "\s*[\d\.]{4,5}", ? (re)
           "time": "\s*[\d\.]{4,5}" (re)
       }, ? (re)
       "test-success.t": [\{] (re)
           "csys": "\s*[\d\.]{4,5}", ? (re)
           "cuser": "\s*[\d\.]{4,5}", ? (re)
           "diff": "", ? (re)
           "end": "\s*[\d\.]{4,5}", ? (re)
           "result": "success", ? (re)
           "start": "\s*[\d\.]{4,5}", ? (re)
           "time": "\s*[\d\.]{4,5}" (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
   
   --- $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? [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\.]{4,5}", ? (re)
           "cuser": "\s*[\d\.]{4,5}", ? (re)
           "diff": "", ? (re)
           "end": "\s*[\d\.]{4,5}", ? (re)
           "result": "success", ? (re)
           "start": "\s*[\d\.]{4,5}", ? (re)
           "time": "\s*[\d\.]{4,5}" (re)
       }, ? (re)
       "test-skip.t": {
           "csys": "\s*[\d\.]{4,5}", ? (re)
           "cuser": "\s*[\d\.]{4,5}", ? (re)
           "diff": "", ? (re)
           "end": "\s*[\d\.]{4,5}", ? (re)
           "result": "skip", ? (re)
           "start": "\s*[\d\.]{4,5}", ? (re)
           "time": "\s*[\d\.]{4,5}" (re)
       }, ? (re)
       "test-success.t": [\{] (re)
           "csys": "\s*[\d\.]{4,5}", ? (re)
           "cuser": "\s*[\d\.]{4,5}", ? (re)
           "diff": "", ? (re)
           "end": "\s*[\d\.]{4,5}", ? (re)
           "result": "success", ? (re)
           "start": "\s*[\d\.]{4,5}", ? (re)
           "time": "\s*[\d\.]{4,5}" (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
   .
   # 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)
 
 Test reusability for third party tools
 ======================================
 
   $ mkdir "$TESTTMP"/anothertests
   $ cd "$TESTTMP"/anothertests
 
 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
   .
   # 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
   > - $TESTDIR, in which test-run-tests.t is placed
   > - \$TESTDIR, in which test-runtestdir.t is placed (expanded at runtime)
   > - \$RUNTESTDIR, in which run-tests.py is placed (expanded at runtime)
   > 
   > #if windows
   >   $ test "\$TESTDIR" = "$TESTTMP\anothertests"
   > #else
   >   $ test "\$TESTDIR" = "$TESTTMP"/anothertests
   > #endif
   > If this prints a path, that means RUNTESTDIR didn't equal
   > TESTDIR as it should have.
   >   $ test "\$RUNTESTDIR" = "$TESTDIR" || 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 TESTDIR.
   >   $ head -n 3 "\$RUNTESTDIR"/../contrib/check-code.py | sed 's@.!.*python@#!USRBINENVPY@'
   >   #!USRBINENVPY
   >   #
   >   # check-code - a style and portability checker for Mercurial
   > EOF
   $ rt test-runtestdir.t
   .
   # 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
   .
   # 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
   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
   .
   # 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
   .
   # 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
   .....
   # 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
   
   --- $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
   
   --- $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
   
   --- $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
   
   --- $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
   ....
   # 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
   .
   --- $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 (case B) output changed
   !.
   Failed test-cases-abc.t (case B): output changed
   # Ran 3 tests, 0 skipped, 1 failed.
   python hash seed: * (glob)
   [1]
 
 --restart works
 
   $ rt --restart
   
   --- $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 (case B) output changed
   !.
   Failed test-cases-abc.t (case 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
   
   --- $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 (case B) output changed
   !.
   Failed test-cases-abc.t (case B): output changed
   # Ran 2 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
   
   --- $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
   > EOF
 
   $ rt --extra-config-opt extensions.purge= test-config-opt.t
   .
   # Ran 1 tests, 0 skipped, 0 failed.