Commit a test script.

diff --git a/tests/compare b/tests/compare
new file mode 100755 (executable)
index 0000000..32f60be
--- /dev/null
+++ b/tests/compare
@@ -0,0 +1,4 @@
+#! /bin/sh
+# Display diff for an individual test
+test=$1
+../advent <${test}.log | ./tapdiffer "${test}" "${test}.chk"