add testcase

tests/scriptlets/trusted-set-attr.test.js

@@ -175,3 +175,36 @@ test('selector + attr + False', (assert) => {
         done();
     }, 30);
 });
+
+test('selector + attr + stringified object', (assert) => {
+    createHit();
+    const attr = 'test-attr-False';
+    const value = '{ playback: false }';
+    const matchClassName = 'testClassFalse';
+    const mismatchClassName = 'none';
+
+    const matchElem = createElem(matchClassName);
+    const mismatchElem = createElem(mismatchClassName);
+
+    const scriptletArgs = [`.${matchClassName}`, attr, value];
+    runScriptlet(name, scriptletArgs);
+
+    assert.ok(matchElem.getAttribute(attr), `Attr ${attr} added to selector-matched element`);
+    assert.ok(matchElem.getAttribute(attr) === value, `New attr value ${value} is correct`);
+    assert.notOk(mismatchElem.getAttribute(attr), `Attr ${attr} is not added to mismatch element`);
+
+    assert.strictEqual(window.hit, 'FIRED');
+    clearGlobalProps('hit');
+
+    const done = assert.async();
+
+    changeAttr(matchElem, attr);
+    setTimeout(() => {
+        assert.ok(matchElem.getAttribute(attr) === value, `New attr val ${value} is still correct`);
+        assert.strictEqual(window.hit, 'FIRED');
+        // Clean up test elements
+        matchElem.remove();
+        mismatchElem.remove();
+        done();
+    }, 30);
+});