From 954fd015e0aacc5b30bf02db7ecf929e6f4fc1c6 Mon Sep 17 00:00:00 2001
From: Jakob Stoklund Olesen <jolesen@mozilla.com>
Date: Tue, 5 Jul 2016 11:40:42 -0700
Subject: [PATCH] Add very basic test framework for parser tests.

Start with a shell script that runs .cton files through 'cton-util cat' and
compares the output to a reference. This can get fancy later.
---
 tests/parser/README.rst    |  9 +++++++++
 tests/parser/run.sh        | 40 ++++++++++++++++++++++++++++++++++++++
 tests/parser/tiny.cton     |  5 +++++
 tests/parser/tiny.cton.ref |  4 ++++
 4 files changed, 58 insertions(+)
 create mode 100644 tests/parser/README.rst
 create mode 100755 tests/parser/run.sh
 create mode 100644 tests/parser/tiny.cton
 create mode 100644 tests/parser/tiny.cton.ref

diff --git a/tests/parser/README.rst b/tests/parser/README.rst
new file mode 100644
index 0000000000..9ac4658d13
--- /dev/null
+++ b/tests/parser/README.rst
@@ -0,0 +1,9 @@
+Parser tests
+============
+
+This directory contains test cases for the Cretonne IL parser.
+
+Each test case consists of a `foo.cton` input file and a `foo.ref` reference
+output file. Each input file is run through the `cton-util cat` command, and the
+output is compared against the reference file. If the two are identical, the
+test passes.
diff --git a/tests/parser/run.sh b/tests/parser/run.sh
new file mode 100755
index 0000000000..e5795df1da
--- /dev/null
+++ b/tests/parser/run.sh
@@ -0,0 +1,40 @@
+#!/bin/bash
+
+# Go to tests directory.
+cd $(dirname "$0")/..
+
+# The path to cton-util should be in $CTONUTIL.
+if [ -z "$CTONUTIL" ]; then
+    CTONUTIL=../src/tools/target/debug/cton-util
+fi
+
+if [ ! -x "$CTONUTIL" ]; then
+    echo "Can't fund executable cton-util: $CTONUTIL" 1>&2
+    exit 1
+fi
+
+declare -a fails
+
+for testcase in $(find parser -name '*.cton'); do
+    ref="${testcase}.ref"
+    if [ ! -r "$ref" ]; then
+        fails=(${fails[@]} "$testcase")
+        echo MISSING: $ref
+    elif diff -u "$ref" <("$CTONUTIL" cat "$testcase"); then
+        echo OK $testcase
+    else
+        fails=(${fails[@]} "$testcase")
+        echo FAIL $testcase
+    fi
+done
+
+if [ ${#fails[@]} -ne 0 ]; then
+    echo
+    echo Failures:
+    for f in "${fails[@]}"; do
+        echo "  $f"
+    done
+    exit 1
+else
+    echo "All passed"
+fi
diff --git a/tests/parser/tiny.cton b/tests/parser/tiny.cton
new file mode 100644
index 0000000000..acc8ea7384
--- /dev/null
+++ b/tests/parser/tiny.cton
@@ -0,0 +1,5 @@
+; The smallest possible function.
+function minimal() {
+ebb0:
+    trap
+}
diff --git a/tests/parser/tiny.cton.ref b/tests/parser/tiny.cton.ref
new file mode 100644
index 0000000000..474c30527e
--- /dev/null
+++ b/tests/parser/tiny.cton.ref
@@ -0,0 +1,4 @@
+function minimal() {
+ebb0:
+    trap
+}