1 files changed, 152 insertions, 0 deletions
diff --git a/testing/web-platform/tests/wasm/jsapi/global/value-get-set.any.js b/testing/web-platform/tests/wasm/jsapi/global/value-get-set.any.js
new file mode 100644
index 0000000000..f95b7ca9e3
--- /dev/null
+++ b/testing/web-platform/tests/wasm/jsapi/global/value-get-set.any.js
@@ -0,0 +1,152 @@
+// META: global=window,dedicatedworker,jsshell
+
+test(() => {
+  const thisValues = [
+    undefined,
+    null,
+    true,
+    "",
+    Symbol(),
+    1,
+    {},
+    WebAssembly.Global,
+    WebAssembly.Global.prototype,
+  ];
+
+  const desc = Object.getOwnPropertyDescriptor(WebAssembly.Global.prototype, "value");
+  assert_equals(typeof desc, "object");
+
+  const getter = desc.get;
+  assert_equals(typeof getter, "function");
+
+  const setter = desc.set;
+  assert_equals(typeof setter, "function");
+
+  for (const thisValue of thisValues) {
+    assert_throws_js(TypeError, () => getter.call(thisValue), `getter with this=${format_value(thisValue)}`);
+    assert_throws_js(TypeError, () => setter.call(thisValue, 1), `setter with this=${format_value(thisValue)}`);
+  }
+}, "Branding");
+
+for (const type of ["i32", "i64", "f32", "f64"]) {
+  const [initial, value, invalid] = type === "i64" ? [0n, 1n, 2] : [0, 1, 2n];
+  const immutableOptions = [
+    [{}, "missing"],
+    [{ "mutable": undefined }, "undefined"],
+    [{ "mutable": null }, "null"],
+    [{ "mutable": false }, "false"],
+    [{ "mutable": "" }, "empty string"],
+    [{ "mutable": 0 }, "zero"],
+  ];
+  for (const [opts, name] of immutableOptions) {
+    test(() => {
+      opts.value = type;
+      const global = new WebAssembly.Global(opts);
+      assert_equals(global.value, initial, "initial value");
+      assert_equals(global.valueOf(), initial, "initial valueOf");
+
+      assert_throws_js(TypeError, () => global.value = value);
+
+      assert_equals(global.value, initial, "post-set value");
+      assert_equals(global.valueOf(), initial, "post-set valueOf");
+    }, `Immutable ${type} (${name})`);
+
+    test(t => {
+      opts.value = type;
+      const global = new WebAssembly.Global(opts);
+      assert_equals(global.value, initial, "initial value");
+      assert_equals(global.valueOf(), initial, "initial valueOf");
+
+      const value = {
+        valueOf: t.unreached_func("should not call valueOf"),
+        toString: t.unreached_func("should not call toString"),
+      };
+      assert_throws_js(TypeError, () => global.value = value);
+
+      assert_equals(global.value, initial, "post-set value");
+      assert_equals(global.valueOf(), initial, "post-set valueOf");
+    }, `Immutable ${type} with ToNumber side-effects (${name})`);
+  }
+
+  const mutableOptions = [
+    [{ "mutable": true }, "true"],
+    [{ "mutable": 1 }, "one"],
+    [{ "mutable": "x" }, "string"],
+    [Object.create({ "mutable": true }), "true on prototype"],
+  ];
+  for (const [opts, name] of mutableOptions) {
+    test(() => {
+      opts.value = type;
+      const global = new WebAssembly.Global(opts);
+      assert_equals(global.value, initial, "initial value");
+      assert_equals(global.valueOf(), initial, "initial valueOf");
+
+      global.value = value;
+
+      assert_throws_js(TypeError, () => global.value = invalid);
+
+      assert_equals(global.value, value, "post-set value");
+      assert_equals(global.valueOf(), value, "post-set valueOf");
+    }, `Mutable ${type} (${name})`);
+  }
+}
+
+test(() => {
+  const argument = { "value": "i64", "mutable": true };
+  const global = new WebAssembly.Global(argument);
+
+  assert_equals(global.value, 0n, "initial value using ToJSValue");
+
+  const valid = [
+    [123n, 123n],
+    [2n ** 63n, - (2n ** 63n)],
+    [true, 1n],
+    [false, 0n],
+    ["456", 456n],
+  ];
+  for (const [input, output] of valid) {
+    global.value = input;
+    assert_equals(global.valueOf(), output, "post-set valueOf");
+  }
+
+  const invalid = [
+    undefined,
+    null,
+    0,
+    1,
+    4.2,
+    Symbol(),
+  ];
+  for (const input of invalid) {
+    assert_throws_js(TypeError, () => global.value = input);
+  }
+}, "i64 mutability");
+
+test(() => {
+  const argument = { "value": "i32", "mutable": true };
+  const global = new WebAssembly.Global(argument);
+  const desc = Object.getOwnPropertyDescriptor(WebAssembly.Global.prototype, "value");
+  assert_equals(typeof desc, "object");
+
+  const setter = desc.set;
+  assert_equals(typeof setter, "function");
+
+  assert_throws_js(TypeError, () => setter.call(global));
+}, "Calling setter without argument");
+
+test(() => {
+  const argument = { "value": "i32", "mutable": true };
+  const global = new WebAssembly.Global(argument);
+  const desc = Object.getOwnPropertyDescriptor(WebAssembly.Global.prototype, "value");
+  assert_equals(typeof desc, "object");
+
+  const getter = desc.get;
+  assert_equals(typeof getter, "function");
+
+  const setter = desc.set;
+  assert_equals(typeof setter, "function");
+
+  assert_equals(getter.call(global, {}), 0);
+  assert_equals(setter.call(global, 1, {}), undefined);
+  assert_equals(global.value, 1);
+}, "Stray argument");