Add simple test suite.

tests/lib.sh

@@ -0,0 +1,91 @@
+# Library for the test suite.
+
+# Copyright (C) 2013  Simon Ruderich
+#
+# 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
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+# Allow running the script directly without running `make check`.
+test "x$builddir" = x && builddir=.
+test "x$EGREP" = x && EGREP='grep -E'
+
+# In case we are called with LD_PRELOAD already set.
+unset LD_PRELOAD
+# Clean locale for reproducible tests.
+LC_ALL=C
+unset LANGUAGE
+
+
+die() {
+    echo "$@" >&2
+    exit 1
+}
+
+get_library_path() {
+    # Get name of the real library file from libtool's .la file.
+    dlname=`$EGREP "^dlname='" "$builddir/../src/libcoloredstderr.la"` \
+        || die 'dlname not found'
+    dlname=`echo "$dlname" | sed "s/^dlname='//; s/'$//"`
+
+    library="$builddir/../src/.libs/$dlname"
+    test -e "$library" || die "'$library' not found"
+
+    echo "`pwd`/$library"
+}
+
+library=`get_library_path`
+force_write=1
+
+
+run_test() {
+    printf '%s' "Running test '$*' .. "
+
+    testcase="$1"
+    expected="$2"
+    shift
+    shift
+
+    (
+        # Standard setup.
+        LD_PRELOAD="$library"
+        COLORED_STDERR_FDS=2,
+        export LD_PRELOAD
+        export COLORED_STDERR_FDS
+
+        # Change pre/post strings for simpler testing.
+        COLORED_STDERR_PRE='>stderr>'
+        COLORED_STDERR_POST='<stderr<'
+        export COLORED_STDERR_PRE
+        export COLORED_STDERR_POST
+        # And force writes to a file (unless we are testing the force).
+        if test "x$force_write" != x; then
+            COLORED_STDERR_FORCE_WRITE=1
+            export COLORED_STDERR_FORCE_WRITE
+        fi
+
+        "$testcase" > output 2>&1
+    )
+
+    diff -u "$expected" output \
+        || die 'failed!'
+    rm output
+    echo 'passed.'
+}
+
+test_script() {
+    run_test "$srcdir/$1" "$srcdir/$1.expected"
+}
+test_program() {
+    run_test "$builddir/$1" "$srcdir/$1.expected"
+}