Add Makefile and script for unit tests

Change-Id: Ib12d9c22c507dff58fabfc6cf80092bc3fd60e3d

2 files changed, 120 insertions, 0 deletions

diff --git a/tests/Makefile b/tests/Makefile
new file mode 100644
index 0000000..d1a1f40
--- /dev/null
+++ b/tests/Makefile
@@ -0,0 +1,47 @@
+#
+# This makefile executes all tests found in the current directory. The
+# tests are divided in categories, typically connected to a particular
+# script, and the actual testcases are defined in the directory
+# <category>/<testcase>.
+#
+# Each testcase directory can contain the following special files:
+#
+#    command     A shell script (doesn't have to be executable) that
+#                will be invoked by sh to run the testcase.
+#    input       Will be fed to the stdin stream of the command script.
+#    output      The expected stdout output of the command script.
+#                If present, the actual output will be compared to the
+#                contents of this file.
+#    status      The expected exit status of the command script,
+#                expressed as an integer.
+#
+# In addition to this, users are encouraged to include a file README that
+# explains the purpose of the testcase in question.
+#
+# Command scripts will be run with the parent directory of the
+# makefile as current directory (should be the top directory of the
+# git). To access files stored in the testcase directory the $TESTDIR
+# variable is available.
+#
+# In addition to the `all' default goal, each test category gets its
+# own make goal, i.e. if you have a category (and subdirectory) named
+# `mytests', you can run just these tests with `make mytests'.
+#
+
+# Only testcases with a `command' file are considered.
+ALL_CATEGORIES := \
+    $(sort $(foreach t,$(wildcard */*/command),$(firstword $(subst /, ,$(t)))))
+
+.PHONY: all
+all: $(ALL_CATEGORIES)
+	@echo All tests successful
+
+define create-category
+$(eval .PHONY: $(1)
+$(1):
+	@./test_category.sh $(1) ..
+)
+endef
+
+$(foreach category,$(ALL_CATEGORIES),\
+    $(call create-category,$(category)))
diff --git a/tests/test_category.sh b/tests/test_category.sh
new file mode 100755
index 0000000..8f8b982
--- /dev/null
+++ b/tests/test_category.sh
@@ -0,0 +1,73 @@
+#!/bin/sh
+
+ERROUTPUT=`mktemp`
+TESTOUTPUT=`mktemp`
+
+cleanup()
+{
+    rm -f $ERROUTPUT 2> /dev/null
+    rm -f $TESTOUTPUT 2> /dev/null
+    return 0
+}
+
+fatal()
+{
+    echo '***' "$@" >&2
+    cleanup
+    exit 1
+}
+
+CATEGORY=$1
+ROOTDIR=$2
+TESTS=`ls $CATEGORY/*/command 2> /dev/null | sed 's|/command||; s|.*/||' | sort`
+
+if [ -z "$CATEGORY" ] ; then
+    fatal No test directory specified.
+fi
+if [ -z "$ROOTDIR" -o ! -d "$ROOTDIR" ] ; then
+    fatal No valid test root directory specified.
+fi
+
+echo Running tests for $CATEGORY
+for TEST in $TESTS ; do
+    echo "    $TEST"
+    export TESTDIR=`pwd`/$CATEGORY/$TEST
+
+    if [ -f $TESTDIR/input -a -f $TESTDIR/output ] ; then
+        ( cd $ROOTDIR && sh $TESTDIR/command ) \
+            < $TESTDIR/input 2> $ERROUTPUT > $TESTOUTPUT
+        EXITSTATUS=$?
+    elif [ -f $TESTDIR/input ] ; then
+        ( cd $ROOTDIR && sh $TESTDIR/command ) \
+            < $TESTDIR/input 2> $ERROUTPUT > /dev/null
+        EXITSTATUS=$?
+    elif [ -f $TESTDIR/output ] ; then
+        ( cd $ROOTDIR && sh $TESTDIR/command ) 2> $ERROUTPUT > $TESTOUTPUT
+        EXITSTATUS=$?
+    elif [ -f $TESTDIR/status ] ; then
+        ( cd $ROOTDIR && sh $TESTDIR/command ) 2> $ERROUTPUT > /dev/null
+        EXITSTATUS=$?
+    fi
+
+    if [ ! -f $TESTDIR/status -a ! -f $TESTDIR/output ] ; then
+        fatal "Bad test case; no expected output or exit status provided."
+    fi
+
+    if [ -f $TESTDIR/status ] ; then
+        EXPECTED_STATUS=`cat $TESTDIR/status`
+        if [ "$EXITSTATUS" != "$EXPECTED_STATUS" ] ; then
+            cat $ERROUTPUT >&2
+            fatal "Bad exit status; expected $EXPECTED_STATUS, got $EXITSTATUS."
+        fi
+    fi
+
+    if [ -f $TESTDIR/output ] ; then
+        if ! cmp -s $TESTDIR/output $TESTOUTPUT ; then
+            diff -u $TESTDIR/output $TESTOUTPUT | \
+                sed -e '1s/--- [^ ][^ ]*/--- expected-output/' \
+                    -e '2s/+++ [^ ][^ ]*/+++ actual-output/'
+            fatal "Unexpected command output (see diff above)."
+        fi
+    fi
+done
+cleanup