test_stdout accepts an expection and a command to execute. It will execute
the command and then compare the stdout from that command to an expectation.
If the expectation is not met, a mock diff output is written to stderr.
Based-on-a-patch-by: Jeff King <p...@peff.net>
Signed-off-by: Michael Rappazzo <rappa...@gmail.com>
---
t/test-lib-functions.sh | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)
diff --git a/t/test-lib-functions.sh b/t/test-lib-functions.sh
index 8d99eb3..95e54b2 100644
--- a/t/test-lib-functions.sh
+++ b/t/test-lib-functions.sh
@@ -941,3 +941,37 @@ mingw_read_file_strip_cr_ () {
eval "$1=\$$1\$line"
done
}
+
+# test_stdout is a helper function to compare expected output with
+# the standard output of a command execution
+#
+# Args:
+# 1: The expected output
+# 2: The command to run
+#
+# You can use it like:
+#
+# test_expect_success 'foo works' '
+# test_cmp "This is expected" cmd_to_run arg1 arg2 ... argN
+# '
+#
+# The output when there is a mismatch mimics diff output, but this
+# can break down for a multi-line result
+test_stdout () {
+ expect=$1
+ shift
+ if ! actual=$("$@")
+ then
+ echo "test_stdout: command failed: '$*'" >&2
+ return 1
+ fi
+ if test "$expect" != "$actual"
+ then
+ echo "test_stdout: unexpected output for '$*'" >&2
+ echo "@@ -N +N @@" >&2
+ echo "-$expect" >&2
+ echo "+$actual" >&2
+ return 1
+ fi
+ return 0
+}
--
2.8.0
--
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