1 files changed, 140 insertions, 0 deletions
diff --git a/testing/web-platform/tests/wasm/jsapi/module/customSections.any.js b/testing/web-platform/tests/wasm/jsapi/module/customSections.any.js
new file mode 100644
index 0000000000..96958316e0
--- /dev/null
+++ b/testing/web-platform/tests/wasm/jsapi/module/customSections.any.js
@@ -0,0 +1,140 @@
+// META: global=window,dedicatedworker,jsshell,shadowrealm
+// META: script=/wasm/jsapi/wasm-module-builder.js
+
+function assert_ArrayBuffer(buffer, expected) {
+  assert_equals(Object.getPrototypeOf(buffer), ArrayBuffer.prototype, "Prototype");
+  assert_true(Object.isExtensible(buffer), "isExtensible");
+  assert_array_equals(new Uint8Array(buffer), expected);
+}
+
+function assert_sections(sections, expected) {
+  assert_true(Array.isArray(sections), "Should be array");
+  assert_equals(Object.getPrototypeOf(sections), Array.prototype, "Prototype");
+  assert_true(Object.isExtensible(sections), "isExtensible");
+
+  assert_equals(sections.length, expected.length);
+  for (let i = 0; i < expected.length; ++i) {
+    assert_ArrayBuffer(sections[i], expected[i]);
+  }
+}
+
+let emptyModuleBinary;
+setup(() => {
+  emptyModuleBinary = new WasmModuleBuilder().toBuffer();
+});
+
+test(() => {
+  assert_throws_js(TypeError, () => WebAssembly.Module.customSections());
+  const module = new WebAssembly.Module(emptyModuleBinary);
+  assert_throws_js(TypeError, () => WebAssembly.Module.customSections(module));
+}, "Missing arguments");
+
+test(() => {
+  const invalidArguments = [
+    undefined,
+    null,
+    true,
+    "",
+    Symbol(),
+    1,
+    {},
+    WebAssembly.Module,
+    WebAssembly.Module.prototype,
+  ];
+  for (const argument of invalidArguments) {
+    assert_throws_js(TypeError, () => WebAssembly.Module.customSections(argument, ""),
+                     `customSections(${format_value(argument)})`);
+  }
+}, "Non-Module arguments");
+
+test(() => {
+  const module = new WebAssembly.Module(emptyModuleBinary);
+  const fn = WebAssembly.Module.customSections;
+  const thisValues = [
+    undefined,
+    null,
+    true,
+    "",
+    Symbol(),
+    1,
+    {},
+    WebAssembly.Module,
+    WebAssembly.Module.prototype,
+  ];
+  for (const thisValue of thisValues) {
+    assert_sections(fn.call(thisValue, module, ""), []);
+  }
+}, "Branding");
+
+test(() => {
+  const module = new WebAssembly.Module(emptyModuleBinary);
+  assert_sections(WebAssembly.Module.customSections(module, ""), []);
+}, "Empty module");
+
+test(() => {
+  const module = new WebAssembly.Module(emptyModuleBinary);
+  assert_not_equals(WebAssembly.Module.customSections(module, ""),
+                    WebAssembly.Module.customSections(module, ""));
+}, "Empty module: array caching");
+
+test(() => {
+  const bytes1 = [87, 101, 98, 65, 115, 115, 101, 109, 98, 108, 121];
+  const bytes2 = [74, 83, 65, 80, 73];
+
+  const builder = new WasmModuleBuilder();
+  builder.addCustomSection("name", bytes1);
+  builder.addCustomSection("name", bytes2);
+  builder.addCustomSection("foo", bytes1);
+  const buffer = builder.toBuffer()
+  const module = new WebAssembly.Module(buffer);
+
+  assert_sections(WebAssembly.Module.customSections(module, "name"), [
+    bytes1,
+    bytes2,
+  ])
+
+  assert_sections(WebAssembly.Module.customSections(module, "foo"), [
+    bytes1,
+  ])
+
+  assert_sections(WebAssembly.Module.customSections(module, ""), [])
+  assert_sections(WebAssembly.Module.customSections(module, "\0"), [])
+  assert_sections(WebAssembly.Module.customSections(module, "name\0"), [])
+  assert_sections(WebAssembly.Module.customSections(module, "foo\0"), [])
+}, "Custom sections");
+
+test(() => {
+  const bytes = [87, 101, 98, 65, 115, 115, 101, 109, 98, 108, 121];
+  const name = "yee\uD801\uDC37eey"
+
+  const builder = new WasmModuleBuilder();
+  builder.addCustomSection(name, bytes);
+  const buffer = builder.toBuffer();
+  const module = new WebAssembly.Module(buffer);
+
+  assert_sections(WebAssembly.Module.customSections(module, name), [
+    bytes,
+  ]);
+  assert_sections(WebAssembly.Module.customSections(module, "yee\uFFFDeey"), []);
+  assert_sections(WebAssembly.Module.customSections(module, "yee\uFFFD\uFFFDeey"), []);
+}, "Custom sections with surrogate pairs");
+
+test(() => {
+  const bytes = [87, 101, 98, 65, 115, 115, 101, 109, 98, 108, 121];
+
+  const builder = new WasmModuleBuilder();
+  builder.addCustomSection("na\uFFFDme", bytes);
+  const buffer = builder.toBuffer();
+  const module = new WebAssembly.Module(buffer);
+
+  assert_sections(WebAssembly.Module.customSections(module, "name"), []);
+  assert_sections(WebAssembly.Module.customSections(module, "na\uFFFDme"), [
+    bytes,
+  ]);
+  assert_sections(WebAssembly.Module.customSections(module, "na\uDC01me"), []);
+}, "Custom sections with U+FFFD");
+
+test(() => {
+  const module = new WebAssembly.Module(emptyModuleBinary);
+  assert_sections(WebAssembly.Module.customSections(module, "", {}), []);
+}, "Stray argument");