Add wabt compatibility test (#42)

* Add wabt compatibility test

wabt-compatibility.spec.ts

@@ -0,0 +1,50 @@
+/* Copyright 2016 Mozilla Foundation
+ * Copyright 2019 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { readdirSync, readFileSync }  from 'fs';
+import { extname, join } from 'path';
+const { parseWat } = require("wabt")();
+
+const TEST_FOLDER = "./test";
+
+const INCOMPATIBLE_FILES = [
+  "atomic.0.wasm.out",
+  "atomic.1.wasm.out",
+  "conversion_sat.wasm.out",
+  "memory_bulk.0.wasm.out",
+  "ref_types.0.wasm.out",
+  "return_call_indirect.wast.0.wasm.out",
+  "return_call_indirect.wast.1.wasm.out",
+  "return_call_indirect.wast.2.wasm.out",
+  "return_call.wast.0.wasm.out",
+  "return_call.wast.1.wasm.out",
+  "simd.wasm.out",
+  "spec.wasm.out",
+  "threads.0.wasm.out",
+];
+
+// Run wabt over .out files.
+readdirSync(TEST_FOLDER)
+  .filter(fileName => extname(fileName) === ".out" && INCOMPATIBLE_FILES.indexOf(fileName) === -1)
+  .forEach(fileName => {
+    test(`wabt ${fileName}`, () => {
+      const filePath = join(TEST_FOLDER, fileName);
+      let data = new Uint8Array(readFileSync(filePath));
+      expect(parseWat(fileName, data)).toBeDefined();
+    });
+  });
+
+