[wasm] Implement the WebAssembly.Module.imports function.

test/mjsunit/wasm/js-api.js

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Flags: --expose-wasm --allow-natives-syntax
 
 if ((typeof drainJobQueue) != "function") {
   drainJobQueue = () => { %RunMicrotasks() };
 }
 
@@ skipping 135 matching lines @@
 assertEq(Object.getPrototypeOf(moduleProto), Object.prototype);
 
 // 'WebAssembly.Module' instance objects
 let emptyModule = new Module(emptyModuleBinary);
 let importingModule = new Module(importingModuleBinary);
 let exportingModule = new Module(exportingModuleBinary);
 assertEq(typeof emptyModule, "object");
 //TODO assertEq(String(emptyModule), "[object WebAssembly.Module]");
 assertEq(Object.getPrototypeOf(emptyModule), moduleProto);
 
-if (false) { // TODO: Module.imports support
 // 'WebAssembly.Module.imports' data property
 let moduleImportsDesc = Object.getOwnPropertyDescriptor(Module, 'imports');
 assertEq(typeof moduleImportsDesc.value, "function");
 assertEq(moduleImportsDesc.writable, true);
 assertEq(moduleImportsDesc.enumerable, false);
 assertEq(moduleImportsDesc.configurable, true);
 
 // 'WebAssembly.Module.imports' method
 let moduleImports = moduleImportsDesc.value;
 assertEq(moduleImports.length, 1);
 assertErrorMessage(() => moduleImports(), TypeError, /requires more than 0 arguments/);
 assertErrorMessage(() => moduleImports(undefined), TypeError, /first argument must be a WebAssembly.Module/);
 assertErrorMessage(() => moduleImports({}), TypeError, /first argument must be a WebAssembly.Module/);
-var arr = moduleImports(new Module(wasmTextToBinary('(module)')));
+var arr = moduleImports(new Module(emptyModuleBinary));
 assertEq(arr instanceof Array, true);
 assertEq(arr.length, 0);
-var arr = moduleImports(new Module(wasmTextToBinary('(module (func (import "a" "b")) (memory (import "c" "d") 1) (table (import "e" "f") 1 anyfunc) (global (import "g" "⚡") i32))')));
+let importingModuleBinary2 = (() => {
+  var text = '(module (func (import "a" "b")) (memory (import "c" "d") 1) (table (import "e" "f") 1 anyfunc) (global (import "g" "⚡") i32))'
+  let builder = new WasmModuleBuilder();
+  builder.addImport("a", "b", kSig_i_i);
+  builder.addImportedMemory("c", "d");
+  builder.addImportedTable("e", "f");
+  builder.addImportedGlobal("g", "x", kWasmI32);
+  return new Int8Array(builder.toBuffer());
+})();
+var arr = moduleImports(new Module(importingModuleBinary2));
 assertEq(arr instanceof Array, true);
 assertEq(arr.length, 4);
 assertEq(arr[0].kind, "function");
 assertEq(arr[0].module, "a");
 assertEq(arr[0].name, "b");
 assertEq(arr[1].kind, "memory");
 assertEq(arr[1].module, "c");
 assertEq(arr[1].name, "d");
 assertEq(arr[2].kind, "table");
 assertEq(arr[2].module, "e");
 assertEq(arr[2].name, "f");
 assertEq(arr[3].kind, "global");
 assertEq(arr[3].module, "g");
-assertEq(arr[3].name, "⚡");
-}
+assertEq(arr[3].name, "x");
 
 if (false) { // TODO: Module.exports property
 // 'WebAssembly.Module.exports' data property
 let moduleExportsDesc = Object.getOwnPropertyDescriptor(Module, 'exports');
 assertEq(typeof moduleExportsDesc.value, "function");
 assertEq(moduleExportsDesc.writable, true);
 assertEq(moduleExportsDesc.enumerable, false);
 assertEq(moduleExportsDesc.configurable, true);
 
 // 'WebAssembly.Module.exports' method
@@ skipping 378 matching lines @@
       assertEq(result.instance instanceof Instance, true);
     }
   }
   assertInstantiateSuccess(emptyModule);
   assertInstantiateSuccess(emptyModuleBinary);
   assertInstantiateSuccess(emptyModuleBinary.buffer);
   assertInstantiateSuccess(importingModule, {"":{f:()=>{}}});
   assertInstantiateSuccess(importingModuleBinary, {"":{f:()=>{}}});
   assertInstantiateSuccess(importingModuleBinary.buffer, {"":{f:()=>{}}});
 }