Add some tests for instantiateStreaming().

wasm/webapi/instantiateStreaming-bad-imports.any.js

@@ -0,0 +1,14 @@
+// META: global=window,worker
+// META: script=/wasm/jsapi/wasm-constants.js
+// META: script=/wasm/jsapi/wasm-module-builder.js
+// META: script=/wasm/jsapi/bad-imports.js
+
+test_bad_imports((name, error, build, ...args) => {
+  promise_test(t => {
+    const builder = new WasmModuleBuilder();
+    build(builder);
+    const buffer = builder.toBuffer();
+    const response = new Response(buffer, { "headers": { "Content-Type": "application/wasm" } });
+    return promise_rejects(t, error, WebAssembly.instantiateStreaming(response, ...args));
+  }, name);
+});

wasm/webapi/instantiateStreaming.any.js

@@ -0,0 +1,20 @@
+// META: global=window,worker
+// META: script=/wasm/jsapi/wasm-constants.js
+// META: script=/wasm/jsapi/wasm-module-builder.js
+// META: script=/wasm/jsapi/assertions.js
+// META: script=/wasm/jsapi/instanceTestFactory.js
+
+let emptyModuleBinary;
+setup(() => {
+  emptyModuleBinary = new WasmModuleBuilder().toBuffer();
+});
+
+for (const [name, fn] of instanceTestFactory) {
+  promise_test(async () => {
+    const { buffer, args, exports, verify } = fn();
+    const response = new Response(buffer, { "headers": { "Content-Type": "application/wasm" } });
+    const result = await WebAssembly.instantiateStreaming(response, ...args);
+    assert_WebAssemblyInstantiatedSource(result, exports);
+    verify(result.instance);
+  }, name);
+}