node/test/addons-napi/test_general/testInstanceOf.js
Rich Trott aa6fac68da test: adjust indentation for stricter linting
ESLint 4.x has stricter linting than previous versions. We are currently
using the legacy indentation rules in the test directory. This commit
changes the indentation of files to comply with the stricter 4.x linting
and enable stricter linting in the test directory.

PR-URL: https://github.com/nodejs/node/pull/14431
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>
2017-07-27 09:24:20 -07:00

98 lines
2.8 KiB
JavaScript

'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_general`);
const path = require('path');
// This test depends on a number of V8 tests.
const v8TestsDir = path.resolve(__dirname, '..', '..', '..', 'deps', 'v8',
'test', 'mjsunit');
const v8TestsDirExists = fs.existsSync(v8TestsDir);
// 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) {
try {
const contents = fs.readFileSync(fileName, { encoding: 'utf8' });
eval(contents.replace(/[(]([^\s(]+)\s+instanceof\s+([^)]+)[)]/g,
'(addon.doInstanceOf($1, $2))'));
} catch (err) {
// This test depends on V8 test files, which may not exist in downloaded
// archives. Emit a warning if the tests cannot be found instead of failing.
if (err.code === 'ENOENT' && !v8TestsDirExists)
process.emitWarning(`test file ${fileName} does not exist.`);
else
throw err;
}
}
testFile(path.join(v8TestsDir, 'instanceof.js'));
testFile(path.join(v8TestsDir, '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)
);
}
function MyClass() {}
Object.defineProperty(MyClass, Symbol.hasInstance, {
value: function(candidate) {
return 'mark' in candidate;
}
});
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);
}