[wasm] Source Phase Imports for ESM Integration (web-platform-tests#4…

…2467) Co-authored-by: Nicolò Ribaudo <[email protected]>
Tobias710219 · Nov 17, 2023 · 8b18dd1 · 8b18dd1
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Showing 4 changed files with 81 additions and 1 deletion.
diff --git a/wasm/jsapi/module/moduleSource.tentative.any.js b/wasm/jsapi/module/moduleSource.tentative.any.js
@@ -0,0 +1,41 @@
+// META: global=window,dedicatedworker,jsshell,shadowrealm
+// META: script=/wasm/jsapi/wasm-module-builder.js
+// META: script=/wasm/jsapi/assertions.js
+
+let emptyModuleBinary;
+setup(() => {
+  emptyModuleBinary = new WasmModuleBuilder().toBuffer();
+});
+
+test(() => {
+  assert_equals(typeof AbstractModuleSource, "undefined");
+  const AbstractModuleSource = Object.getPrototypeOf(WebAssembly.Module);
+  assert_equals(AbstractModuleSource.name, "AbstractModuleSource");
+  assert_not_equals(AbstractModuleSource, Function);
+}, "AbstractModuleSource intrinsic");
+
+test(() => {
+  const AbstractModuleSourceProto = Object.getPrototypeOf(WebAssembly.Module.prototype);
+  assert_not_equals(AbstractModuleSourceProto, Object);
+  const AbstractModuleSource = Object.getPrototypeOf(WebAssembly.Module);
+  assert_equals(AbstractModuleSource.prototype, AbstractModuleSourceProto);
+}, "AbstractModuleSourceProto intrinsic");
+
+test(() => {
+  const builder = new WasmModuleBuilder();
+
+  builder
+    .addFunction("fn", kSig_v_v)
+    .addBody([])
+    .exportFunc();
+  builder.addMemory(0, 256, true);
+
+  const buffer = builder.toBuffer()
+  const module = new WebAssembly.Module(buffer);
+
+  const AbstractModuleSource = Object.getPrototypeOf(WebAssembly.Module);
+  const toStringTag = Object.getOwnPropertyDescriptor(AbstractModuleSource.prototype, Symbol.toStringTag).get;
+
+  assert_equals(toStringTag.call(module), "WebAssembly.Module");
+  assert_throws_js(TypeError, () => toStringTag.call({}));
+}, "AbstractModuleSourceProto toStringTag brand check");
diff --git a/wasm/webapi/esm-integration/resources/worker-source-phase.js b/wasm/webapi/esm-integration/resources/worker-source-phase.js
@@ -0,0 +1,3 @@
+import source modSource from "./worker.wasm";
+assert_true(modSource instanceof WebAssembly.Module);
+assert_true(await import.source("./worker.wasm") === modSource);
diff --git a/wasm/webapi/esm-integration/resources/worker.js b/wasm/webapi/esm-integration/resources/worker.js
@@ -1 +1,2 @@
-import * as mod from "./worker.wasm"
+import * as mod from "./worker.wasm";
+assert_true(await import("./worker.wasm") === mod);
diff --git a/wasm/webapi/esm-integration/source-phase.tentative.html b/wasm/webapi/esm-integration/source-phase.tentative.html
@@ -0,0 +1,35 @@
+<!doctype html>
+<title>Source phase imports</title>
+
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script type=module>
+setup({ single_test: true });
+
+import source exportedNamesSource from "./resources/exported-names.wasm";
+
+assert_true(exportedNamesSource instanceof WebAssembly.Module);
+const AbstractModuleSource = Object.getPrototypeOf(WebAssembly.Module);
+assert_equals(AbstractModuleSource.name, "AbstractModuleSource");
+assert_true(exportedNamesSource instanceof AbstractModuleSource);
+
+assert_array_equals(WebAssembly.Module.exports(exportedNamesSource).sort(),
+                    ["func", "glob", "mem", "tab"]);
+
+const wasmImportFromWasmSource = await import.source("./resources/wasm-import-from-wasm.wasm");
+
+assert_true(wasmImportFromWasmSource instanceof WebAssembly.Module);
+
+let logged = false;
+const instance = await WebAssembly.instantiate(wasmImportFromWasmSource, {
+  "./wasm-export-to-wasm.wasm": {
+    log () {
+      logged = true;
+    }
+  }
+});
+instance.exports.logExec();
+assert_true(logged);
+
+done();
+</script>