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assert.js
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function buildMockPromise (settledValue, shouldFulfill) {
// Support SpiderMonkey: setTimeout is not supported, but native Promise is.
var defer = typeof setTimeout !== 'undefined'
// eslint-disable-next-line no-undef
? setTimeout
: function (fn) {
// eslint-disable-next-line no-undef, compat/compat
Promise.resolve().then(fn);
};
var thenable = {
then: function (fulfilledCallback, rejectedCallback) {
defer(function () {
return shouldFulfill
? fulfilledCallback.call(thenable, settledValue)
: rejectedCallback.call(thenable, settledValue);
});
// returning another thenable for easy confirmation of return value
return buildMockPromise('final promise', true);
}
};
return thenable;
}
QUnit.module('assert');
QUnit.test('ok', function (assert) {
assert.ok(true);
assert.ok(1);
assert.ok('1');
assert.ok(Infinity);
assert.ok({});
assert.ok([]);
assert.ok(true, 'with message');
});
QUnit.test('notOk', function (assert) {
assert.notOk(false);
assert.notOk(0);
assert.notOk('');
assert.notOk(null);
assert.notOk(undefined);
assert.notOk(NaN);
assert.notOk(false, 'with message');
});
QUnit.test('true', function (assert) {
function functionThatReturnsTrue () {
return true;
}
assert.true(true);
assert.true(functionThatReturnsTrue());
});
QUnit.test('false', function (assert) {
function functionThatReturnsFalse () {
return false;
}
assert.false(false);
assert.false(functionThatReturnsFalse());
});
QUnit.test('equal', function (assert) {
assert.equal(1, 1);
assert.equal('foo', 'foo');
assert.equal('foo', ['foo']);
assert.equal('foo', { toString: function () { return 'foo'; } });
assert.equal(0, [0]);
});
QUnit.test('notEqual', function (assert) {
assert.notEqual(1, 2);
assert.notEqual('foo', 'bar');
assert.notEqual({}, {});
assert.notEqual([], []);
});
QUnit.test('strictEqual', function (assert) {
assert.strictEqual(1, 1);
assert.strictEqual('foo', 'foo');
});
QUnit.test('notStrictEqual', function (assert) {
assert.notStrictEqual(1, 2);
assert.notStrictEqual('foo', 'bar');
assert.notStrictEqual('foo', ['foo']);
assert.notStrictEqual('1', 1);
assert.notStrictEqual('foo', { toString: function () { return 'foo'; } });
});
QUnit.test('closeTo', function (assert) {
assert.closeTo(1, 1, 0);
assert.closeTo(1, 1, 0.1);
assert.closeTo(7, 7.1, 0.1);
assert.closeTo(7, 7.1, 0.2);
assert.closeTo(2011, 2013, 2);
assert.closeTo(0.1 + 0.2, 0.3, 0.001);
assert.closeTo(20.13, 20.10, 0.05);
assert.throws(function () {
assert.closeTo(1, 1);
}, TypeError, 'missing delta');
assert.throws(function () {
assert.closeTo(1, 1, false);
}, TypeError, 'invalid delta');
});
QUnit.test('propEqual', function (assert) {
function Foo (x, y, z) {
this.x = x;
this.y = y;
this.z = z;
}
Foo.prototype.doA = function () {};
Foo.prototype.bar = 'non-function';
function Bar () {
}
Bar.prototype = Object.create(Foo.prototype);
Bar.prototype.constructor = Bar;
assert.propEqual(
new Foo(1, '2', []),
{
x: 1,
y: '2',
z: []
}
);
assert.notPropEqual(
new Foo('1', 2, 3),
{
x: 1,
y: '2',
z: 3
},
'Primitive values are strictly compared'
);
assert.notPropEqual(
new Foo(1, '2', []),
{
x: 1,
y: '2',
z: {}
},
'Array type is preserved'
);
assert.notPropEqual(
new Foo(1, '2', {}),
{
x: 1,
y: '2',
z: []
},
'Empty array is not the same as empty object'
);
assert.propEqual(
new Foo(1, '2', new Foo([3], new Bar(), null)),
{
x: 1,
y: '2',
z: {
x: [3],
y: {},
z: null
}
},
'Complex nesting of different types, inheritance and constructors'
);
});
QUnit.test('propContains', function (assert) {
function Foo (x, y, z) {
this.x = x;
this.y = y;
this.z = z;
}
Foo.prototype.doA = function () {};
Foo.prototype.bar = 'non-function';
function Bar (x) {
this.x = x;
}
Bar.prototype = Object.create(Foo.prototype);
Bar.prototype.constructor = Bar;
assert.propContains(
{ a: 0, b: 'something', c: true },
{ a: 0, b: 'something', c: true }
);
assert.propContains(
{ a: 0, b: 'something', c: true },
{ a: 0, c: true },
'match object subset'
);
assert.propContains(
['a', 'b'],
{ 1: 'b' },
'match array subset via plain object'
);
assert.propContains(
[],
{},
'empty array contains empty object'
);
assert.propContains(
{},
[],
'empty object contains empty array'
);
assert.propContains(
new Foo(1, '2', []),
new Foo(1, '2', []),
'deeply equal class instances'
);
assert.propContains(
new Foo(1, '2', []),
{
x: 1,
y: '2',
z: []
},
'match different constructor via plain object'
);
assert.propContains(
new Foo(1, '2', []),
{
x: 1
},
'match different constructor subset via plain object'
);
assert.propContains(
new Foo(1, '2', ['x']),
new Foo(1, '2', { 0: 'x' }),
'match nested array via plain object'
);
assert.propContains(
new Foo(1, ['a', 'b'], new Foo(['c', 'd'], new Bar(), null)),
{
x: 1,
y: ['a', 'b'],
z: {
x: { 1: 'd' }
}
},
'match nested array subset via plain object'
);
assert.propContains(
new Foo(1, '2'),
new Bar(1),
'match subset via different constructor'
);
});
QUnit.test('notPropContains', function (assert) {
function Foo (x, y, z) {
this.x = x;
this.y = y;
this.z = z;
}
Foo.prototype.doA = function () {};
Foo.prototype.bar = 'non-function';
function Bar (x) {
this.x = x;
}
Bar.prototype = Object.create(Foo.prototype);
Bar.prototype.constructor = Bar;
assert.notPropContains(
{ a: 0, b: 'something', c: true },
{ a: 0, b: 'different', c: true }
);
assert.notPropContains(
{ a: 0, b: 'something', c: true },
{ a: 0, c: false }
);
assert.notPropContains(
{ a: 0, b: 'something', c: true },
{ e: 'missing' }
);
assert.notPropContains(
new Foo(1, '2', []),
{
x: 1,
y: '2',
z: [],
e: 'missing'
},
'matching and missing properties'
);
assert.notPropContains(
new Foo(1, '2', []),
{
e: 'missing'
},
'missing property'
);
assert.notPropContains(
new Foo(1, [], new Foo([], new Bar(), 'something')),
new Foo(1, [], new Foo([], new Bar(), 'different')),
'difference in nested value'
);
assert.notPropContains(
new Foo(1, '2', new Foo([3], new Bar(), null)),
{
x: 1,
y: '2',
z: {
e: 'missing'
}
},
'nested object with missing property'
);
assert.notPropContains(
new Foo(1, '2'),
new Bar(2),
'different property value via different constructor'
);
});
QUnit.test('throws', function (assert) {
function CustomError (message) {
this.message = message;
}
CustomError.prototype.toString = function () {
return this.message;
};
assert.throws(
function () {
throw 'my error';
}
);
assert.throws(
function () {
throw 'my error';
},
"simple string throw, no 'expected' value given"
);
assert.throws(function () {
// eslint-disable-next-line qunit/no-throws-string
assert.throws(
undefined, // irrelevant - errors before even verifying this
'expected is a string',
'message is non-null'
);
}, /^Error: assert\.throws does not accept a string value for the expected argument/);
assert.throws(
function () {
throw new Error('error message');
},
/error message/,
'use regexp against instance of Error'
);
assert.throws(
function () {
throw new TypeError();
},
Error,
'thrown TypeError without a message is an instance of Error'
);
assert.throws(
function () {
throw new TypeError();
},
TypeError,
'thrown TypeError without a message is an instance of TypeError'
);
assert.throws(
function () {
throw new TypeError('error message');
},
Error,
'thrown TypeError with a message is an instance of Error'
);
assert.throws(
function () {
throw new TypeError('error message');
},
TypeError,
'thrown TypeError with a message is an instance of TypeError'
);
assert.throws(
function () {
throw new CustomError('some error description');
},
CustomError,
'thrown error is an instance of CustomError'
);
assert.throws(
function () {
throw new Error('some error description');
},
/description/,
'use a regex to match against the stringified error'
);
assert.throws(
function () {
throw new Error('foo');
},
new Error('foo'),
'thrown error object is similar to the expected Error object'
);
assert.throws(
function () {
throw new CustomError('some error description');
},
new CustomError('some error description'),
'thrown error object is similar to the expected CustomError object'
);
assert.throws(
function () {
throw {
name: 'SomeName',
message: 'some message'
};
},
{ name: 'SomeName', message: 'some message' },
'thrown object is similar to the expected plain object'
);
assert.throws(
function () {
throw {
name: 'SomeName',
message: 'some message'
};
},
/^SomeName: some message$/,
'thrown object matches formatted error message'
);
assert.throws(
function () {
throw {
name: true,
message: 'some message'
};
},
/^true: some message$/,
'formatted string for Error object with non-string name property'
);
assert.throws(
function () {
throw {};
},
/^Error$/,
'thrown object with no name or message matches formatted error message'
);
assert.throws(
function () {
throw {
name: 'SomeName'
};
},
/^SomeName$/,
'thrown object with name but no message matches formatted error message'
);
assert.throws(
function () {
throw {
message: 'some message'
};
},
/^Error: some message$/,
'thrown object with message but no name matches formatted error message'
);
assert.throws(
function () {
throw new CustomError('some error description');
},
function (err) {
return err instanceof CustomError && /description/.test(err);
},
'custom validation function'
);
this.CustomError = CustomError;
assert.throws(
function () {
throw new this.CustomError('some error description');
},
/description/,
"throw error from property of 'this' context"
);
// the following are nested assertions, validating that it
// initially throws due to an invalid expected value
assert.throws(
function () {
assert.throws(
undefined, // irrelevant
2
);
},
/^Error: Invalid expected value type \(number\) provided to assert\.throws\.$/,
'throws errors when provided a number'
);
// note that "falsey" values are actually ok
assert.throws(
function () {
throw new this.CustomError('some error description');
},
0,
'throws passes when expected is falsey (0)'
);
assert.throws(
function () {
assert.throws(
undefined, // irrelevant
true
);
},
/^Error: Invalid expected value type \(boolean\) provided to assert\.throws\.$/,
'throws errors when provided a boolean'
);
// note that "falsey" values are actually ok
assert.throws(
function () {
throw new this.CustomError('some error description');
},
false,
'throws passes when expected is falsey (false)'
);
assert.throws(
function () {
assert.throws(
undefined, // irrelevant
[]
);
},
/^Error: Invalid expected value type \(array\) provided to assert\.throws\.$/,
'throws errors when provided an array'
);
});
QUnit.test('raises', function (assert) {
assert.strictEqual(assert.raises, assert.throws, 'alias for throws');
});
QUnit.test('rejects', function (assert) {
function CustomError (message) {
this.message = message;
}
CustomError.prototype.toString = function () {
return this.message;
};
var rejectsReturnValue = assert.rejects(
buildMockPromise('my error')
);
assert.equal(
typeof rejectsReturnValue.then,
'function',
'rejects returns a thennable'
);
assert.rejects(
buildMockPromise('my error'),
"simple string rejection, no 'expected' value given"
);
assert.rejects(
buildMockPromise(new Error('error message')),
/error message/,
'use regexp against instance of Error'
);
assert.rejects(
buildMockPromise(new TypeError()),
Error,
'thrown TypeError without a message is an instance of Error'
);
assert.rejects(
buildMockPromise(new TypeError()),
TypeError,
'thrown TypeError without a message is an instance of TypeError'
);
assert.rejects(
buildMockPromise(new TypeError('error message')),
Error,
'thrown TypeError with a message is an instance of Error'
);
assert.rejects(
buildMockPromise(new TypeError('error message')),
TypeError,
'thrown TypeError with a message is an instance of TypeError'
);
assert.rejects(
buildMockPromise(new CustomError('some error description')),
CustomError,
'thrown error is an instance of CustomError'
);
assert.rejects(
buildMockPromise(new Error('some error description')),
/description/,
'use a regex to match against the stringified error'
);
assert.rejects(
buildMockPromise(new Error('foo')),
new Error('foo'),
'thrown error object is similar to the expected Error object'
);
assert.rejects(
buildMockPromise(new CustomError('some error description')),
new CustomError('some error description'),
'thrown error object is similar to the expected CustomError object'
);
assert.rejects(
buildMockPromise({
name: 'SomeName',
message: 'some message'
}),
{ name: 'SomeName', message: 'some message' },
'thrown object is similar to the expected plain object'
);
assert.rejects(
buildMockPromise(new CustomError('some error description')),
function (err) {
return err instanceof CustomError && /description/.test(err);
},
'custom validation function'
);
this.CustomError = CustomError;
assert.rejects(
buildMockPromise(new this.CustomError('some error description')),
/description/,
"throw error from property of 'this' context"
);
assert.rejects(
buildMockPromise(undefined),
'reject with undefined against no matcher'
);
// the following are nested assertions, validating that it
// initially throws due to an invalid expected value
assert.throws(
function () {
assert.rejects(
undefined, // irrelevant
2
);
},
/^Error: Invalid expected value type \(number\) provided to assert\.rejects\.$/,
'rejects errors when provided a number'
);
// note that "falsey" values are actually ok
assert.rejects(
buildMockPromise(undefined),
0,
'rejects passes when expected is falsey (0)'
);
assert.throws(
function () {
assert.rejects(
undefined, // irrelevant
true
);
},
/^Error: Invalid expected value type \(boolean\) provided to assert\.rejects\.$/,
'rejects errors when provided a boolean'
);
// note that "falsey" values are actually ok
assert.rejects(
buildMockPromise(undefined),
false,
'rejects passes when expected is falsey (false)'
);
assert.throws(
function () {
assert.rejects(
undefined, // irrelevant
[]
);
},
/^Error: Invalid expected value type \(array\) provided to assert\.rejects\.$/,
'rejects errors when provided an array'
);
assert.throws(
function () {
assert.rejects(
undefined, // irrelevant
'expected is a string',
'message is non-null'
);
},
/^Error: assert\.rejects does not accept a string value for the expected argument/,
'rejects errors when provided a string'
);
// should return a thenable
var returnValue = assert.rejects(
buildMockPromise(undefined)
);
assert.strictEqual(typeof returnValue, 'object');
assert.strictEqual(typeof returnValue.then, 'function');
});
if (typeof window !== 'undefined') {
/* global window */
QUnit.test('throws [global eval]', function (assert) {
assert.throws(
function () {
var execScript = window.execScript || function (data) {
// eslint-disable-next-line no-eval, no-useless-call
window.eval.call(window, data);
};
// eslint-disable-next-line no-implied-eval
execScript("throw 'error';");
},
'globally-executed errors caught'
);
});
}
QUnit.module('assert - failing assertions', {
beforeEach: function (assert) {
var originalPushResult = assert.pushResult;
assert.pushResult = function (resultInfo) {
// Inverts the result so we can test failing assertions
resultInfo.result = !resultInfo.result;
originalPushResult.call(this, resultInfo);
};
}
});
QUnit.test('ok', function (assert) {
assert.ok(false);
assert.ok(0);
assert.ok('');
assert.ok(null);
assert.ok(undefined);
assert.ok(NaN);
});
QUnit.test('notOk', function (assert) {
assert.notOk(true);
assert.notOk(1);
assert.notOk('1');
assert.notOk(Infinity);
assert.notOk({});
assert.notOk([]);
});
QUnit.test('equal', function (assert) {
assert.equal(1, 2);
assert.equal('foo', 'bar');
assert.equal({}, {});
assert.equal([], []);
});
QUnit.test('notEqual', function (assert) {
assert.notEqual(1, 1);
assert.notEqual('foo', 'foo');
assert.notEqual('foo', ['foo']);
assert.notEqual('foo', { toString: function () { return 'foo'; } });
assert.notEqual(0, [0]);
});
QUnit.test('strictEqual', function (assert) {
assert.strictEqual(1, 2);
assert.strictEqual('foo', 'bar');
assert.strictEqual('foo', ['foo']);
assert.strictEqual('1', 1);
assert.strictEqual('foo', { toString: function () { return 'foo'; } });
});
QUnit.test('notStrictEqual', function (assert) {
assert.notStrictEqual(1, 1);
assert.notStrictEqual('foo', 'foo');
});
QUnit.test('deepEqual', function (assert) {
assert.deepEqual(['foo', 'bar'], ['foo']);
});
QUnit.test('notDeepEqual', function (assert) {
assert.notDeepEqual(['foo', 'bar'], ['foo', 'bar']);
});
QUnit.test('propEqual', function (assert) {
function Foo (x, y, z) {
this.x = x;
this.y = y;
this.z = z;
}
Foo.prototype.baz = function () {};
Foo.prototype.bar = 'prototype';
assert.propEqual(
new Foo('1', 2, 3),
{
x: 1,
y: '2',
z: 3
}
);
});
QUnit.test('notPropEqual', function (assert) {
function Foo (x, y, z) {
this.x = x;
this.y = y;
this.z = z;
}
Foo.prototype.baz = function () {};
Foo.prototype.bar = 'prototype';
assert.notPropEqual(
new Foo(1, '2', []),
{
x: 1,
y: '2',
z: []
}
);
});
QUnit.test('throws', function (assert) {
assert.throws(
function () {
},
'throws fails without a thrown error'
);
assert.throws(
function () {
throw 'foo';
},
/bar/,
"throws fail when regexp doesn't match the error message"
);
assert.throws(
function () {
throw 'foo';
},
function () {
return false;
},
'throws fail when expected function returns false'
);
// non-function actual values
assert.throws(
undefined,
'throws fails when actual value is undefined');
assert.throws(
2,
'throws fails when actual value is a number');
assert.throws(
[],
'throws fails when actual value is an array');
assert.throws(
'notafunction',
'throws fails when actual value is a string');
assert.throws(
{},
'throws fails when actual value is an object');
});
QUnit.test('rejects', function (assert) {
assert.rejects(
buildMockPromise('some random value', /* shouldResolve */ true),
'fails when the provided promise fulfills'
);
assert.rejects(
buildMockPromise('foo'),
/bar/,
'rejects fails when regexp does not match'
);
assert.rejects(
buildMockPromise(new Error('foo')),
function RandomConstructor () { },
'rejects fails when rejected value is not an instance of the provided constructor'
);
function SomeConstructor () { }
assert.rejects(
buildMockPromise(new SomeConstructor()),
function OtherRandomConstructor () { },
'rejects fails when rejected value is not an instance of the provided constructor'
);
assert.rejects(
buildMockPromise('some value'),
function () { return false; },
'rejects fails when the expected function returns false'
);
assert.rejects(null);
});