Polyfill memory leak prevention.

addon-test-support/ember-qunit/index.js

@@ -243,6 +243,21 @@ export function setupTestIsolationValidation() {
   QUnit.done(reportIfTestNotIsolated);
 }
 
+// This polyfills the changes from https://github.com/qunitjs/qunit/pull/1279
+// and should be removed when that change is released and included in a release
+// version of QUnit
+function polyfillMemoryLeakPrevention() {
+  QUnit.testDone(function() {
+    // release the test callback
+    QUnit.config.current.callback = undefined;
+  });
+
+  QUnit.moduleDone(function() {
+    // release the module hooks
+    QUnit.config.current.module.hooks = {};
+  });
+}
+
 /**
    @method start
    @param {Object} [options] Options to be used for enabling/disabling behaviors
@@ -260,6 +275,7 @@ export function setupTestIsolationValidation() {
    of `Ember.onerror` will be disabled.
    @param {Boolean} [options.setupTestIsolationValidation] If `false` test isolation validation
    will be disabled.
+   @param {Boolean} [options._polyfillMemoryLeakPrevention] If `false` the polyfilled memory leak prevention will not be enabled.
  */
 export function start(options = {}) {
   if (options.loadTests !== false) {
@@ -289,6 +305,10 @@ export function start(options = {}) {
     setupTestIsolationValidation();
   }
 
+  if (options._polyfillMemoryLeakPrevention !== false) {
+    polyfillMemoryLeakPrevention();
+  }
+
   if (options.startTests !== false) {
     startTests();
   }