Make sure binaryen.js tests validate (#2269)

Without `assert`, even if a test does not validate, the errors will only
show up in its corresponding `.txt` file while the test will succeed.
This makes sure it errors out when a test fails to validate. This also
adds validation checks if there is none.

1 files changed, 5 insertions, 1 deletions

diff --git a/test/binaryen.js/atomics.js b/test/binaryen.js/atomics.js
index 7eb9cb8ec..a1f8fc842 100644
--- a/test/binaryen.js/atomics.js
+++ b/test/binaryen.js/atomics.js
@@ -1,3 +1,7 @@
+function assert(x) {
+  if (!x) throw 'error!';
+}
+
 var module = Binaryen.parseText(`
 (module
   (memory $0 (shared 1 1))
@@ -60,5 +64,5 @@ module.addFunction("main", signature, [], module.block("", [
 ]));
 
 module.setFeatures(Binaryen.Features.Atomics);
-module.validate();
+assert(module.validate());
 console.log(module.emitText());