Add functional tests through "cmdtests"

These tests run a list of commands on both the system gentoolkit and the
source from the active work directory, and then compares the results.

It's a great way to verify that a refactoring didn't introduce an
unwanted change in behavior.

1 files changed, 21 insertions, 0 deletions

diff --git a/cmdtests/runtests.sh b/cmdtests/runtests.sh
new file mode 100755
index 0000000..ba0ff22
--- /dev/null
+++ b/cmdtests/runtests.sh
@@ -0,0 +1,21 @@
+#!/bin/bash
+
+TEST_AGAINST_PYTHON_PATH=$1
+
+while read -r line; do
+    echo "Running $line > before"
+    PYTHONPATH="${TEST_AGAINST_PYTHON_PATH}"
+    eval "$line" > before || exit 1
+    echo "Running $line > after"
+    PYTHONPATH="../pym"
+    eval "$line" > after || exit 1
+    DIFF=$(diff -u before after)
+    if [[ -n $DIFF ]]; then
+        echo "Different!"
+        echo "$DIFF"
+        exit 1
+    fi
+done < cmds.txt
+
+rm before after
+echo "All commands output the exact same thing!"