Implement Table#length and Table#get

test/mjsunit/wasm/table.js

Index: test/mjsunit/wasm/table.js
diff --git a/test/mjsunit/wasm/table.js b/test/mjsunit/wasm/table.js
index 0275bc05225c70e5be65032b6e0f0053b5c27cfb..1b56b615850b41a9966ec1ea8c342fad1d590072 100644
--- a/test/mjsunit/wasm/table.js
+++ b/test/mjsunit/wasm/table.js
@@ -45,25 +45,46 @@ function assertTableIsValid(table) {
 
   assertThrows(() => new WebAssembly.Table({element: "anyfunc", initial: 0, maximum: int32ButOob}));
 
-  let table = new WebAssembly.Table({element: "anyfunc", initial: 1});
+  let table;
+  table = new WebAssembly.Table({element: "anyfunc", initial: 1});
   assertTableIsValid(table);
-})();
+  assertEquals(1, table.length);
+  assertEquals(null, table.get(0));
 
-(function TestConstructorWithMaximum() {
-  let table = new WebAssembly.Table({element: "anyfunc", maximum: 10});
+  table = new WebAssembly.Table({element: "anyfunc", initial: "2"});
   assertTableIsValid(table);
-})();
+  assertEquals(2, table.length);
+  assertEquals(null, table.get(0));
+  assertEquals(null, table.get(1));
 
-(function TestInitialIsUndefined() {
-  // New memory with initial = undefined, which means initial = 0.
-  let table = new WebAssembly.Table({element: "anyfunc", initial: undefined});
+  table = new WebAssembly.Table({element: "anyfunc", initial: {valueOf() { return "1" }}});
   assertTableIsValid(table);
-})();
+  assertEquals(1, table.length);
+  assertEquals(null, table.get(0));
+
+  table = new WebAssembly.Table({element: "anyfunc", initial: undefined});
+  assertTableIsValid(table);
+  assertEquals(0, table.length);
+
+  table = new WebAssembly.Table({element: "anyfunc"});
+  assertTableIsValid(table);
+  assertEquals(0, table.length);
+
+  table = new WebAssembly.Table({element: "anyfunc", maximum: 10});
+  assertTableIsValid(table);
+  assertEquals(0, table.length);
+
+  table = new WebAssembly.Table({element: "anyfunc", maximum: "10"});
+  assertTableIsValid(table);
+  assertEquals(0, table.length);
 
-(function TestMaximumIsUndefined() {
-  // New memory with maximum = undefined, which means maximum = 0.
-  let table = new WebAssembly.Table({element: "anyfunc", initial: 0, maximum: undefined});
+  table = new WebAssembly.Table({element: "anyfunc", maximum: {valueOf() { return "10" }}});
   assertTableIsValid(table);
+  assertEquals(0, table.length);
+
+  table = new WebAssembly.Table({element: "anyfunc", initial: 0, maximum: undefined});
+  assertTableIsValid(table);
+  assertEquals(0, table.length);
 })();
 
 (function TestMaximumIsReadOnce() {
@@ -93,3 +114,32 @@ function assertTableIsValid(table) {
   let table = new WebAssembly.Table(desc);
   assertTableIsValid(table);
 })();
+
+(function TestLength() {
+  for (let i = 0; i < 10; ++i) {
+    let table = new WebAssembly.Table({element: "anyfunc", initial: i});
+    assertEquals(i, table.length);
+  }
+
+  assertThrows(() => WebAssembly.Table.prototype.length.call([]), TypeError);
+})();
+
+(function TestGet() {
+  let table = new WebAssembly.Table({element: "anyfunc", initial: 10});
+
+  for (let i = 0; i < 10; ++i) {
+    assertEquals(null, table.get(i));
+    assertEquals(null, table.get(String(i)));
+  }
+  assertEquals(null, table.get(""));
+  assertEquals(null, table.get(NaN));
+  assertEquals(null, table.get({}));
+  assertEquals(null, table.get([]));
+  assertEquals(null, table.get(() => {}));
+
+  assertEquals(undefined, table.get(10));
+  assertEquals(undefined, table.get(-1));
+
+  assertThrows(() => table.get(Symbol()), TypeError);
+  assertThrows(() => WebAssembly.Table.prototype.get.call([], 0), TypeError);
+})();