[ESNext] Implement DynamicImportCall

test/mjsunit/harmony/modules-import-8.js

+// Copyright 2017 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: --allow-natives-syntax --harmony-dynamic-import
+
+var ran = false;
+
+var x = {
+  get toString() { return undefined; }
+};
+import(x);
+
+var x = {
+  toString() {
+    throw new Error('42 is the answer');
+  }
+};
+import(x);
+
+var x = {
+  get toString() {
+    throw new Error('42 is the answer');
+  }
+};
+import(x);
+
+async function test1() {
+  try {
+    let x = {
+      toString() {
+        throw new Error('42 is the answer');
+      }
+    };
+
+    let namespace = await import(x);
+    %AbortJS('failure: this should throw');
+  } catch(e) {
+    assertEquals(e.message, '42 is the answer');
+    ran = true;
+  }
+}
+
+test1();
+
+%RunMicrotasks();
+
+assertTrue(ran);
+
+ran = false;
+async function test2() {
+  try {
+    let x = {
+      get toString() {
+        throw new Error('42 is the answer');
+      }
+    };
+
+    let namespace = await import(x);
+    %AbortJS('failure: this should throw');
+  } catch(e) {
+    assertEquals(e.message, '42 is the answer');
+    ran = true;
+  }
+}
+
+test2();
+
+%RunMicrotasks();
+
+assertTrue(ran);
+
+ran = false;
+async function test3() {
+  try {
+    let x = {
+      get toString() { return undefined; }
+    };
+    let namespace = await import(x);
+    %AbortJS('failure: this should throw');
+  } catch(e) {
+    assertEquals(e.message, 'Cannot convert object to primitive value');
+    ran = true;
+  }
+}
+
+test3();
+
+%RunMicrotasks();
+
+assertTrue(ran);