test-mutated-package.sh

#!/bin/bash

# This exec script implements
# - the replacement of the original file with the mutation,
# - the execution of all tests originating from the package of the mutated file,
# - and the reporting if the mutation was killed.

if [ -z ${MUTATE_CHANGED+x} ]; then echo "MUTATE_CHANGED is not set"; exit 1; fi
if [ -z ${MUTATE_ORIGINAL+x} ]; then echo "MUTATE_ORIGINAL is not set"; exit 1; fi
if [ -z ${MUTATE_PACKAGE+x} ]; then echo "MUTATE_PACKAGE is not set"; exit 1; fi

function clean_up {
	if [ -f "$MUTATE_ORIGINAL".tmp ];
	then
		mv "$MUTATE_ORIGINAL".tmp "$MUTATE_ORIGINAL"
	fi
}

function sig_handler {
	clean_up

	exit "$GOMUTESTING_RESULT"
}
trap sig_handler SIGHUP SIGINT SIGTERM

export GOMUTESTING_DIFF=$(diff -u "$MUTATE_ORIGINAL" "$MUTATE_CHANGED")

mv "$MUTATE_ORIGINAL" "$MUTATE_ORIGINAL".tmp
cp "$MUTATE_CHANGED" "$MUTATE_ORIGINAL"

export MUTATE_TIMEOUT=${MUTATE_TIMEOUT:-10}
export MUTATE_BUILD_TAGS=${MUTATE_BUILD_TAGS}

if [ -n "$TEST_RECURSIVE" ]; then
	TEST_RECURSIVE="/..."
fi

GOMUTESTING_TEST=$(go test -timeout "$(printf '%ds' "$MUTATE_TIMEOUT")" -tags="$MUTATE_BUILD_TAGS" "$MUTATE_PACKAGE""$TEST_RECURSIVE" 2>&1)
export GOMUTESTING_RESULT=$?

if [ "$MUTATE_DEBUG" = true ] ; then
	echo "$GOMUTESTING_TEST"
fi

clean_up

case $GOMUTESTING_RESULT in
0) # tests passed -> FAIL
	echo "$GOMUTESTING_DIFF"

	exit 1
	;;
1) # tests failed -> PASS
	if [ "$MUTATE_DEBUG" = true ] ; then
		echo "$GOMUTESTING_DIFF"
	fi

	exit 0
	;;
2) # did not compile -> SKIP
	if [ "$MUTATE_VERBOSE" = true ] ; then
		echo "Mutation did not compile"
	fi

	if [ "$MUTATE_DEBUG" = true ] ; then
		echo "$GOMUTESTING_DIFF"
	fi

	exit 2
	;;
*) # Unkown exit code -> SKIP
	echo "Unknown exit code"
	echo "$GOMUTESTING_DIFF"

	exit "$GOMUTESTING_RESULT"
	;;
esac