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// META: global=jsshell
// META: script=/wasm/jsapi/wasm-constants.js
// META: script=/wasm/jsapi/wasm-module-builder.js
let emptyModuleBinary;
setup(() => {
emptyModuleBinary = new WasmModuleBuilder().toBuffer();
});
function assert_ModuleExportDescriptor(export_, expected) {
assert_equals(Object.getPrototypeOf(export_), Object.prototype, "Prototype");
assert_true(Object.isExtensible(export_), "isExtensible");
const name = Object.getOwnPropertyDescriptor(export_, "name");
assert_true(name.writable, "name: writable");
assert_true(name.enumerable, "name: enumerable");
assert_true(name.configurable, "name: configurable");
assert_equals(name.value, expected.name);
const kind = Object.getOwnPropertyDescriptor(export_, "kind");
assert_true(kind.writable, "kind: writable");
assert_true(kind.enumerable, "kind: enumerable");
assert_true(kind.configurable, "kind: configurable");
assert_equals(kind.value, expected.kind);
}
function assert_exports(exports, expected) {
assert_true(Array.isArray(exports), "Should be array");
assert_equals(Object.getPrototypeOf(exports), Array.prototype, "Prototype");
assert_true(Object.isExtensible(exports), "isExtensible");
assert_equals(exports.length, expected.length);
for (let i = 0; i < expected.length; ++i) {
assert_ModuleExportDescriptor(exports[i], expected[i]);
}
}
test(() => {
assert_throws(new TypeError(), () => WebAssembly.Module.exports());
}, "Missing arguments");
test(() => {
const invalidArguments = [
undefined,
null,
true,
"",
Symbol(),
1,
{},
WebAssembly.Module,
WebAssembly.Module.prototype,
];
for (const argument of invalidArguments) {
assert_throws(new TypeError(), () => WebAssembly.Module.exports(argument),
`exports(${format_value(argument)})`);
}
}, "Non-Module arguments");
test(() => {
const module = new WebAssembly.Module(emptyModuleBinary);
const fn = WebAssembly.Module.exports;
const thisValues = [
undefined,
null,
true,
"",
Symbol(),
1,
{},
WebAssembly.Module,
WebAssembly.Module.prototype,
];
for (const thisValue of thisValues) {
assert_array_equals(fn.call(thisValue, module), []);
}
}, "Branding");
test(() => {
const module = new WebAssembly.Module(emptyModuleBinary);
const exports = WebAssembly.Module.exports(module);
assert_exports(exports, []);
}, "Empty module");
test(() => {
const module = new WebAssembly.Module(emptyModuleBinary);
assert_not_equals(WebAssembly.Module.exports(module), WebAssembly.Module.exports(module));
}, "Empty module: array caching");
test(() => {
const builder = new WasmModuleBuilder();
builder
.addFunction("fn", kSig_v_v)
.addBody([])
.exportFunc();
builder
.addFunction("fn2", kSig_v_v)
.addBody([])
.exportFunc();
builder.setTableLength(1);
builder.addExportOfKind("table", kExternalTable, 0);
builder.addGlobal(kWasmI32, true)
.exportAs("global")
.init = 7;
builder.addGlobal(kWasmF64, true)
.exportAs("global2")
.init = 1.2;
builder.addMemory(0, 256, true);
const buffer = builder.toBuffer()
const module = new WebAssembly.Module(buffer);
const exports = WebAssembly.Module.exports(module);
const expected = [
{ "kind": "function", "name": "fn" },
{ "kind": "function", "name": "fn2" },
{ "kind": "table", "name": "table" },
{ "kind": "global", "name": "global" },
{ "kind": "global", "name": "global2" },
{ "kind": "memory", "name": "memory" },
];
assert_exports(exports, expected);
}, "exports");
test(() => {
const module = new WebAssembly.Module(emptyModuleBinary);
const exports = WebAssembly.Module.exports(module, {});
assert_exports(exports, []);
}, "Stray argument");
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