1 files changed, 87 insertions, 0 deletions
diff --git a/test/addons-napi/test_instanceof/test.js b/test/addons-napi/test_instanceof/test.js
new file mode 100644
index 0000000000..38d17031e9
--- /dev/null
+++ b/test/addons-napi/test_instanceof/test.js
@@ -0,0 +1,87 @@
+'use strict';
+const fs = require('fs');
+
+const common = require('../../common');
+const assert = require('assert');
+
+// addon is referenced through the eval expression in testFile
+// eslint-disable-next-line no-unused-vars
+const addon = require(`./build/${common.buildType}/test_instanceof`);
+const path = require('path');
+
+// The following assert functions are referenced by v8's unit tests
+// See for instance deps/v8/test/mjsunit/instanceof.js
+// eslint-disable-next-line no-unused-vars
+function assertTrue(assertion) {
+  return assert.strictEqual(true, assertion);
+}
+
+// eslint-disable-next-line no-unused-vars
+function assertFalse(assertion) {
+  assert.strictEqual(false, assertion);
+}
+
+// eslint-disable-next-line no-unused-vars
+function assertEquals(leftHandSide, rightHandSide) {
+  assert.strictEqual(leftHandSide, rightHandSide);
+}
+
+// eslint-disable-next-line no-unused-vars
+function assertThrows(statement) {
+  assert.throws(function() {
+    eval(statement);
+  }, Error);
+}
+
+function testFile(fileName) {
+  const contents = fs.readFileSync(fileName, { encoding: 'utf8' });
+  eval(contents.replace(/[(]([^\s(]+)\s+instanceof\s+([^)]+)[)]/g,
+                        '(addon.doInstanceOf($1, $2))'));
+}
+
+testFile(
+    path.join(path.resolve(__dirname, '..', '..', '..',
+                           'deps', 'v8', 'test', 'mjsunit'),
+              'instanceof.js'));
+testFile(
+    path.join(path.resolve(__dirname, '..', '..', '..',
+                           'deps', 'v8', 'test', 'mjsunit'),
+              'instanceof-2.js'));
+
+// We can only perform this test if we have a working Symbol.hasInstance
+if (typeof Symbol !== 'undefined' && 'hasInstance' in Symbol &&
+    typeof Symbol.hasInstance === 'symbol') {
+
+  function compareToNative(theObject, theConstructor) {
+    assert.strictEqual(addon.doInstanceOf(theObject, theConstructor),
+      (theObject instanceof theConstructor));
+  }
+
+  const MyClass = function MyClass() {};
+  Object.defineProperty(MyClass, Symbol.hasInstance, {
+    value: function(candidate) {
+      return 'mark' in candidate;
+    }
+  });
+
+  const MySubClass = function MySubClass() {};
+  MySubClass.prototype = new MyClass();
+
+  let x = new MySubClass();
+  let y = new MySubClass();
+  x.mark = true;
+
+  compareToNative(x, MySubClass);
+  compareToNative(y, MySubClass);
+  compareToNative(x, MyClass);
+  compareToNative(y, MyClass);
+
+  x = new MyClass();
+  y = new MyClass();
+  x.mark = true;
+
+  compareToNative(x, MySubClass);
+  compareToNative(y, MySubClass);
+  compareToNative(x, MyClass);
+  compareToNative(y, MyClass);
+}