[FYI] {master} tests: avoid spurious failures with parallel make

[Stefano Lattarini]

Some tests are unprepared to be run with a make command that runs
in parallel mode by default.  This can happen e.g., if the user
explicitly run the tests with something like:

  AM_TESTSUITE_MAKE="gmake -j3" in the

in the environment, but also if the make used in the testsuite is
Sun Distributed Make, and the 'DMAKE_MODE' environment variable is
set to "parallel".

Fix some instances of this issue.

* tests/tap-doc.test (Makefile.am): Declare explicit dependencies
among the test cases, to ensure they are run in the correct order.
* tests/tap-doc2.test: Set the 'DMAKE_MODE' environment variable
to "serial", to prevent Sun dmake from trying to run in parallel.
Remove other now-superfluous workarounds for dmake.
---
 tests/tap-doc.test  |    6 +++++-
 tests/tap-doc2.test |   14 ++++----------
 2 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/tests/tap-doc.test b/tests/tap-doc.test
index de39b42..94ced61 100755
--- a/tests/tap-doc.test
+++ b/tests/tap-doc.test
@@ -1,5 +1,5 @@
 #! /bin/sh
-# Copyright (C) 2011 Free Software Foundation, Inc.
+# Copyright (C) 2011, 2012 Free Software Foundation, Inc.
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -31,6 +31,10 @@ cat > Makefile.am << 'END'
 TESTS = foo.sh zardoz.tap bar.sh mu.tap
 TEST_EXTENSIONS = .sh .tap
 TAP_LOG_DRIVER = $(srcdir)/tap-driver
+## Ensure the test scripts are run in the correct order.
+mu.log: bar.log
+bar.log: zardoz.log
+zardoz.log: foo.log
 END
 
 cat > foo.sh <<'END'
diff --git a/tests/tap-doc2.test b/tests/tap-doc2.test
index c5fe2b6..c844f79 100755
--- a/tests/tap-doc2.test
+++ b/tests/tap-doc2.test
@@ -1,5 +1,5 @@
 #! /bin/sh
-# Copyright (C) 2011 Free Software Foundation, Inc.
+# Copyright (C) 2011, 2012 Free Software Foundation, Inc.
 #
 # This program is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -71,13 +71,6 @@ chmod a+x *.test
 
 # Strip extra "informative" lines that could be printed by Solaris
 # Distributed Make.
-strip_dmake_junk ()
-{
-  cat $1
-  LC_ALL=C $EGREP -v ' --> ([0-9][0-9]* job|[Jj]ob output)' "$@" >t
-  mv -f t $1
-}
-
 mkdir build-aux
 cp "$am_scriptdir"/tap-driver.pl build-aux \
   || framework_failure_ "fetching the perl TAP driver"
@@ -89,6 +82,9 @@ cp "$am_scriptdir"/tap-driver.pl build-aux \
 
 case $MAKE in *\ -j*) skip_ "can't work easily with concurrent make";; esac
 
+# Prevent Sun Distributed Make from trying to run in parallel.
+DMAKE_MODE=serial; export DMAKE_MODE
+
 $MAKE check >stdout && { cat stdout; Exit 1; }
 cat stdout
 
@@ -105,7 +101,6 @@ ERROR: baz.test - exited with status 7
 END
 
 sed -n '/^PASS: foo\.test/,/^ERROR: baz\.test/p' stdout > got
-strip_dmake_junk got
 
 cat exp
 cat got
@@ -128,7 +123,6 @@ PASS: baz.test 1
 END
 
 sed -n '/^PASS: foo\.test/,/^PASS: baz\.test/p' stdout > got
-strip_dmake_junk got
 
 cat exp
 cat got
-- 
1.7.7.3