[js-api] Add basic.tentative.any.js from wpt (#255)

This adds
https://github.com/web-platform-tests/wpt/blob/master/wasm/jsapi/exception/basic.tentative.any.js,
which was somehow added only wpt repo, to this repo as well.

Author: aheejin

test/js-api/exception/basic.tentative.any.js

@@ -0,0 +1,121 @@
+// META: global=window,worker,jsshell
+// META: script=/wasm/jsapi/wasm-module-builder.js
+
+function assert_throws_wasm(fn, message) {
+  try {
+    fn();
+    assert_not_reached(`expected to throw with ${message}`);
+  } catch (e) {
+    assert_true(e instanceof WebAssembly.Exception, `Error should be a WebAssembly.Exception with ${message}`);
+  }
+}
+
+promise_test(async () => {
+  const kWasmAnyRef = 0x6f;
+  const kSig_v_r = makeSig([kWasmAnyRef], []);
+  const builder = new WasmModuleBuilder();
+  const tagIndex = builder.addTag(kSig_v_r);
+  builder.addFunction("throw_param", kSig_v_r)
+    .addBody([
+      kExprLocalGet, 0,
+      kExprThrow, tagIndex,
+    ])
+    .exportFunc();
+  const buffer = builder.toBuffer();
+  const {instance} = await WebAssembly.instantiate(buffer, {});
+  const values = [
+    undefined,
+    null,
+    true,
+    false,
+    "test",
+    Symbol(),
+    0,
+    1,
+    4.2,
+    NaN,
+    Infinity,
+    {},
+    () => {},
+  ];
+  for (const v of values) {
+    assert_throws_wasm(() => instance.exports.throw_param(v), String(v));
+  }
+}, "Wasm function throws argument");
+
+promise_test(async () => {
+  const builder = new WasmModuleBuilder();
+  const tagIndex = builder.addTag(kSig_v_a);
+  builder.addFunction("throw_null", kSig_v_v)
+    .addBody([
+      kExprRefNull, kWasmAnyFunc,
+      kExprThrow, tagIndex,
+    ])
+    .exportFunc();
+  const buffer = builder.toBuffer();
+  const {instance} = await WebAssembly.instantiate(buffer, {});
+  assert_throws_wasm(() => instance.exports.throw_null());
+}, "Wasm function throws null");
+
+promise_test(async () => {
+  const builder = new WasmModuleBuilder();
+  const tagIndex = builder.addTag(kSig_v_i);
+  builder.addFunction("throw_int", kSig_v_v)
+    .addBody([
+      ...wasmI32Const(7),
+      kExprThrow, tagIndex,
+    ])
+    .exportFunc();
+  const buffer = builder.toBuffer();
+  const {instance} = await WebAssembly.instantiate(buffer, {});
+  assert_throws_wasm(() => instance.exports.throw_int());
+}, "Wasm function throws integer");
+
+promise_test(async () => {
+  const builder = new WasmModuleBuilder();
+  const fnIndex = builder.addImport("module", "fn", kSig_v_v);
+  const tagIndex= builder.addTag(kSig_v_r);
+  builder.addFunction("catch_exception", kSig_r_v)
+    .addBody([
+      kExprTry, kWasmStmt,
+        kExprCallFunction, fnIndex,
+      kExprCatch, tagIndex,
+        kExprReturn,
+      kExprEnd,
+      kExprRefNull, kWasmAnyRef,
+    ])
+    .exportFunc();
+
+  const buffer = builder.toBuffer();
+
+  const error = new Error();
+  const fn = () => { throw error };
+  const {instance} = await WebAssembly.instantiate(buffer, {
+    module: { fn }
+  });
+  assert_throws_exactly(error, () => instance.exports.catch_exception());
+}, "Imported JS function throws");
+
+promise_test(async () => {
+  const builder = new WasmModuleBuilder();
+  const fnIndex = builder.addImport("module", "fn", kSig_v_v);
+  builder.addFunction("catch_and_rethrow", kSig_r_v)
+    .addBody([
+      kExprTry, kWasmStmt,
+        kExprCallFunction, fnIndex,
+      kExprCatchAll,
+        kExprRethrow, 0x00,
+      kExprEnd,
+      kExprRefNull, kWasmAnyRef,
+    ])
+    .exportFunc();
+
+  const buffer = builder.toBuffer();
+
+  const error = new Error();
+  const fn = () => { throw error };
+  const {instance} = await WebAssembly.instantiate(buffer, {
+    module: { fn }
+  });
+  assert_throws_exactly(error, () => instance.exports.catch_and_rethrow());
+}, "Imported JS function throws, Wasm catches and rethrows");