[wasm] Add some API shape tests for WebAssembly.Function.

Author: Ms2ger

wasm/jsapi/function/call.tentative.any.js

@@ -9,3 +9,8 @@ test(() => {
     var fun = new WebAssembly.Function({parameters: ["i32", "i32"], results: ["i32"]}, addxy);
     assert_equals(fun(1, 2), 3)
 }, "test calling function")
+
+test(() => {
+    var fun = new WebAssembly.Function({parameters: ["i32", "i32"], results: ["i32"]}, addxy);
+    assert_throws_js(TypeError, () => new fun(1, 2));
+}, "test constructing function");

wasm/jsapi/function/constructor.tentative.any.js

@@ -5,6 +5,29 @@ function addxy(x, y) {
     return x + y
 }
 
+test(() => {
+    assert_implements(WebAssembly.Function, "WebAssembly.Function is not implemented");
+    assert_function_name(WebAssembly.Function, "Function", "WebAssembly.Function");
+}, "name");
+
+test(() => {
+    assert_implements(WebAssembly.Function, "WebAssembly.Function is not implemented");
+    assert_function_length(WebAssembly.Function, 2, "WebAssembly.Function");
+}, "length");
+
+test(() => {
+    assert_implements(WebAssembly.Function, "WebAssembly.Function is not implemented");
+    assert_throws_js(TypeError, () => new WebAssembly.Function());
+    const argument = {parameters: [], results: []};
+    assert_throws_js(TypeError, () => new WebAssembly.Function(argument));
+}, "Too few arguments");
+
+test(() => {
+    assert_implements(WebAssembly.Function, "WebAssembly.Function is not implemented");
+    const arguments = [{parameters: ["i32", "i32"], results: ["i32"]}, addxy];
+    assert_throws_js(TypeError, () => WebAssembly.Function(...arguments));
+}, "Calling");
+
 test(() => {
     assert_implements(WebAssembly.Function, "WebAssembly.Function is not implemented");
     var fun = new WebAssembly.Function({parameters: ["i32", "i32"], results: ["i32"]}, addxy);