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, 6 insertions, 2 deletions

diff --git a/test/binaryen.js/event.js b/test/binaryen.js/event.js
index ec7a0f3b1..01ef43165 100644
--- a/test/binaryen.js/event.js
+++ b/test/binaryen.js/event.js
@@ -1,3 +1,7 @@
+function assert(x) {
+  if (!x) throw 'error!';
+}
+
 function cleanInfo(info) {
   var ret = {};
   for (var x in info) {
@@ -22,11 +26,11 @@ console.log("getEventInfo=" + JSON.stringify(cleanInfo(eventInfo)));
 module.addEventExport("a-event", "a-event-exp");
 module.addEventImport("a-event-imp", "module", "base", 0, vif);
 
-module.validate();
+assert(module.validate());
 console.log(module.emitText());
 
 module.removeExport("a-event-exp");
 module.removeEvent("a-event");
 
-module.validate();
+assert(module.validate());
 console.log(module.emitText());