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// Originally from narwhal.js (http://narwhaljs.org)
// Copyright (c) 2009 Thomas Robinson <280north.com>
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the 'Software'), to
// deal in the Software without restriction, including without limitation the
// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
// sell copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
const { isDeepEqual, isDeepStrictEqual } =
require('internal/util/comparisons');
const errors = require('internal/errors');
// The assert module provides functions that throw
// AssertionError's when particular conditions are not met. The
// assert module must conform to the following interface.
const assert = module.exports = ok;
// All of the following functions must throw an AssertionError
// when a corresponding condition is not met, with a message that
// may be undefined if not provided. All assertion methods provide
// both the actual and expected values to the assertion error for
// display purposes.
function innerFail(actual, expected, message, operator, stackStartFunction) {
if (message instanceof Error) throw message;
throw new errors.AssertionError({
message,
actual,
expected,
operator,
stackStartFunction
});
}
function fail(actual, expected, message, operator, stackStartFunction) {
const argsLen = arguments.length;
if (argsLen === 0) {
message = 'Failed';
} else if (argsLen === 1) {
message = actual;
actual = undefined;
} else if (argsLen === 2) {
operator = '!=';
}
innerFail(actual, expected, message, operator, stackStartFunction || fail);
}
assert.fail = fail;
// The AssertionError is defined in internal/error.
// new assert.AssertionError({ message: message,
// actual: actual,
// expected: expected });
assert.AssertionError = errors.AssertionError;
// Pure assertion tests whether a value is truthy, as determined
// by !!value.
function ok(value, message) {
if (!value) innerFail(value, true, message, '==', ok);
}
assert.ok = ok;
// The equality assertion tests shallow, coercive equality with ==.
/* eslint-disable no-restricted-properties */
assert.equal = function equal(actual, expected, message) {
// eslint-disable-next-line eqeqeq
if (actual != expected) innerFail(actual, expected, message, '==', equal);
};
// The non-equality assertion tests for whether two objects are not
// equal with !=.
assert.notEqual = function notEqual(actual, expected, message) {
// eslint-disable-next-line eqeqeq
if (actual == expected) {
innerFail(actual, expected, message, '!=', notEqual);
}
};
// The equivalence assertion tests a deep equality relation.
assert.deepEqual = function deepEqual(actual, expected, message) {
if (!isDeepEqual(actual, expected)) {
innerFail(actual, expected, message, 'deepEqual', deepEqual);
}
};
// The non-equivalence assertion tests for any deep inequality.
assert.notDeepEqual = function notDeepEqual(actual, expected, message) {
if (isDeepEqual(actual, expected)) {
innerFail(actual, expected, message, 'notDeepEqual', notDeepEqual);
}
};
/* eslint-enable */
assert.deepStrictEqual = function deepStrictEqual(actual, expected, message) {
if (!isDeepStrictEqual(actual, expected)) {
innerFail(actual, expected, message, 'deepStrictEqual', deepStrictEqual);
}
};
assert.notDeepStrictEqual = notDeepStrictEqual;
function notDeepStrictEqual(actual, expected, message) {
if (isDeepStrictEqual(actual, expected)) {
innerFail(actual, expected, message, 'notDeepStrictEqual',
notDeepStrictEqual);
}
}
assert.strictEqual = function strictEqual(actual, expected, message) {
if (!Object.is(actual, expected)) {
innerFail(actual, expected, message, 'strictEqual', strictEqual);
}
};
assert.notStrictEqual = function notStrictEqual(actual, expected, message) {
if (Object.is(actual, expected)) {
innerFail(actual, expected, message, 'notStrictEqual', notStrictEqual);
}
};
function expectedException(actual, expected) {
if (typeof expected !== 'function') {
// Should be a RegExp, if not fail hard
return expected.test(actual);
}
// Guard instanceof against arrow functions as they don't have a prototype.
if (expected.prototype !== undefined && actual instanceof expected) {
return true;
}
if (Error.isPrototypeOf(expected)) {
return false;
}
return expected.call({}, actual) === true;
}
function tryBlock(block) {
try {
block();
} catch (e) {
return e;
}
}
function innerThrows(shouldThrow, block, expected, message) {
var details = '';
if (typeof block !== 'function') {
throw new errors.TypeError('ERR_INVALID_ARG_TYPE', 'block', 'Function',
block);
}
if (typeof expected === 'string') {
message = expected;
expected = null;
}
const actual = tryBlock(block);
if (shouldThrow === true) {
if (actual === undefined) {
if (expected && expected.name) {
details += ` (${expected.name})`;
}
details += message ? `: ${message}` : '.';
fail(actual, expected, `Missing expected exception${details}`, fail);
}
if (expected && expectedException(actual, expected) === false) {
throw actual;
}
} else if (actual !== undefined) {
if (!expected || expectedException(actual, expected)) {
details = message ? `: ${message}` : '.';
fail(actual,
expected,
`Got unwanted exception${details}\n${actual.message}`,
fail);
}
throw actual;
}
}
// Expected to throw an error.
assert.throws = function throws(block, error, message) {
innerThrows(true, block, error, message);
};
assert.doesNotThrow = function doesNotThrow(block, error, message) {
innerThrows(false, block, error, message);
};
assert.ifError = function ifError(err) { if (err) throw err; };
// Expose a strict only variant of assert
function strict(value, message) {
if (!value) innerFail(value, true, message, '==', strict);
}
assert.strict = Object.assign(strict, assert, {
equal: assert.strictEqual,
deepEqual: assert.deepStrictEqual,
notEqual: assert.notStrictEqual,
notDeepEqual: assert.notDeepStrictEqual
});
assert.strict.strict = assert.strict;
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