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5
| var shim = require('./shim');
var forEach = shim.forEach;
var getKeys = shim.getKeys;
var every = shim.every;
var indexOf = shim.indexOf;
var utils = require('./utils');
var isRegExp = utils.isRegExp;
var isArray = utils.isArray;
module.exports = function (expect) {
expect.addAssertion('[not] to be (ok|truthy)', function (expect, subject) {
this.assert(subject);
});
expect.addAssertion('[not] to be', function (expect, subject, value) {
if (typeof subject === 'string' && typeof value === 'string') {
expect(subject, '[not] to equal', value);
} else {
expect(subject === value, '[not] to be truthy');
}
});
expect.addAssertion('[not] to be true', function (expect, subject) {
expect(subject, '[not] to be', true);
});
expect.addAssertion('[not] to be false', function (expect, subject) {
expect(subject, '[not] to be', false);
});
expect.addAssertion('[not] to be falsy', function (expect, subject) {
expect(subject, '[!not] to be truthy');
});
expect.addAssertion('[not] to be null', function (expect, subject) {
expect(subject, '[not] to be', null);
});
expect.addAssertion('[not] to be undefined', function (expect, subject) {
expect(typeof subject, '[not] to be', 'undefined');
});
expect.addAssertion('[not] to be NaN', function (expect, subject) {
expect(isNaN(subject), '[not] to be true');
});
expect.addAssertion('[not] to be close to', function (expect, subject, value, epsilon) {
this.errorMode = 'bubble';
if (typeof epsilon !== 'number') {
epsilon = 1e-9;
}
try {
expect(Math.abs(subject - value), '[not] to be less than or equal to', epsilon);
} catch (e) {
expect.fail('expected {0} {1} {2} (epsilon: {3})',
expect.inspect(subject),
this.testDescription,
expect.inspect(value),
epsilon.toExponential());
}
});
expect.addAssertion('[not] to be (a|an)', function (expect, subject, type) {
if ('string' === typeof type) {
// typeof with support for 'array'
expect('array' === type ? isArray(subject) :
'object' === type ? 'object' === typeof subject && null !== subject :
/^reg(?:exp?|ular expression)$/.test(type) ? isRegExp(subject) :
type === typeof subject,
'[not] to be true');
} else {
expect(subject instanceof type, '[not] to be true');
}
return this;
});
// Alias for common '[not] to be (a|an)' assertions
expect.addAssertion('[not] to be (a|an) (boolean|number|string|function|object|array|regexp|regex|regular expression)', function (expect, subject) {
var matches = /(.* be (?:a|an)) ([\w\s]+)/.exec(this.testDescription);
expect(subject, matches[1], matches[2]);
});
forEach(['string', 'array', 'object'], function (type) {
expect.addAssertion('to be (the|an) empty ' + type, function (expect, subject) {
expect(subject, 'to be a', type);
expect(subject, 'to be empty');
});
expect.addAssertion('to be a non-empty ' + type, function (expect, subject) {
expect(subject, 'to be a', type);
expect(subject, 'not to be empty');
});
});
expect.addAssertion('[not] to match', function (expect, subject, regexp) {
expect(regexp.exec(subject), '[not] to be truthy');
});
expect.addAssertion('[not] to have [own] property', function (expect, subject, key, value) {
if (arguments.length === 4) {
expect(subject, 'to have [own] property', key);
expect(subject[key], '[not] to equal', value);
} else {
expect(this.flags.own ?
subject && subject.hasOwnProperty(key) :
subject && subject[key] !== undefined,
'[not] to be truthy');
}
});
expect.addAssertion('[not] to have [own] properties', function (expect, subject, properties) {
if (properties && isArray(properties)) {
forEach(properties, function (property) {
expect(subject, '[not] to have [own] property', property);
});
} else if (properties && typeof properties === 'object') {
// TODO the not flag does not make a lot of sense in this case
if (this.flags.not) {
forEach(getKeys(properties), function (property) {
expect(subject, 'not to have [own] property', property);
});
} else {
try {
forEach(getKeys(properties), function (property) {
var value = properties[property];
if (typeof value === 'undefined') {
expect(subject, 'not to have [own] property', property);
} else {
expect(subject, 'to have [own] property', property, value);
}
});
} catch (e) {
e.actual = expect.sanitize(subject);
e.expected = expect.sanitize(properties);
for (var propertyName in subject) {
if ((!this.flags.own || subject.hasOwnProperty(propertyName)) && !(propertyName in properties)) {
e.expected[propertyName] = expect.sanitize(subject[propertyName]);
}
if (!this.flags.own && !(propertyName in e.actual)) {
e.actual[propertyName] = expect.sanitize(subject[propertyName]);
}
}
e.showDiff = true;
throw e;
}
}
} else {
throw new Error("Assertion '" + this.testDescription + "' only supports " +
"input in the form of an Array or an Object.");
}
});
expect.addAssertion('[not] to have length', function (expect, subject, length) {
if (!subject || typeof subject.length !== 'number') {
throw new Error("Assertion '" + this.testDescription +
"' only supports array like objects");
}
expect(subject.length, '[not] to be', length);
});
expect.addAssertion('[not] to be empty', function (expect, subject) {
var length;
if (subject && 'number' === typeof subject.length) {
length = subject.length;
} else if (isArray(subject) || typeof subject === 'string') {
length = subject.length;
} else if (subject && typeof subject === 'object') {
length = getKeys(subject).length;
} else {
throw new Error("Assertion '" + this.testDescription +
"' only supports strings, arrays and objects");
}
expect(length, '[not] to be', 0);
});
expect.addAssertion('to be non-empty', function (expect, subject) {
expect(subject, 'not to be empty');
});
expect.addAssertion('to [not] [only] have (key|keys)', '[not] to have (key|keys)', function (expect, subject, keys) {
keys = isArray(keys) ?
keys :
Array.prototype.slice.call(arguments, 2);
var hasKeys = subject && every(keys, function (key) {
return subject.hasOwnProperty(key);
});
if (this.flags.only) {
expect(hasKeys, 'to be truthy');
expect(getKeys(subject).length === keys.length, '[not] to be truthy');
} else {
expect(hasKeys, '[not] to be truthy');
}
});
expect.addAssertion('[not] to contain', function (expect, subject, arg) {
var args = Array.prototype.slice.call(arguments, 2);
var that = this;
if ('string' === typeof subject) {
forEach(args, function (arg) {
expect(subject.indexOf(arg) !== -1, '[not] to be truthy');
});
} else if (isArray(subject)) {
forEach(args, function (arg) {
expect(subject && indexOf(subject, arg) !== -1, '[not] to be truthy');
});
} else if (subject === null) {
expect(that.flags.not, '[not] to be falsy');
} else {
throw new Error("Assertion '" + this.testDescription +
"' only supports strings and arrays");
}
});
expect.addAssertion('[not] to be finite', function (expect, subject) {
expect(typeof subject === 'number' && isFinite(subject), '[not] to be truthy');
});
expect.addAssertion('[not] to be infinite', function (expect, subject) {
expect(typeof subject === 'number' && !isNaN(subject) && !isFinite(subject), '[not] to be truthy');
});
expect.addAssertion('[not] to be within', function (expect, subject, start, finish) {
this.args = [start + '..' + finish];
expect(subject, 'to be a number');
expect(subject >= start && subject <= finish, '[not] to be true');
});
expect.addAssertion('<', '[not] to be (<|less than|below)', function (expect, subject, value) {
expect(subject < value, '[not] to be true');
});
expect.addAssertion('<=', '[not] to be (<=|less than or equal to)', function (expect, subject, value) {
expect(subject <= value, '[not] to be true');
});
expect.addAssertion('>', '[not] to be (>|greater than|above)', function (expect, subject, value) {
expect(subject > value, '[not] to be true');
});
expect.addAssertion('>=', '[not] to be (>=|greater than or equal to)', function (expect, subject, value) {
expect(subject >= value, '[not] to be true');
});
expect.addAssertion('[not] to be positive', function (expect, subject) {
expect(subject, '[not] to be >', 0);
});
expect.addAssertion('[not] to be negative', function (expect, subject) {
expect(subject, '[not] to be <', 0);
});
expect.addAssertion('[not] to equal', function (expect, subject, value) {
try {
expect(expect.equal(value, subject), '[not] to be true');
} catch (e) {
if (!this.flags.not) {
e.expected = expect.sanitize(value);
e.actual = expect.sanitize(subject);
// Explicitly tell mocha to stringify and diff arrays
// and objects, but only when the types are identical
// and non-primitive:
if (e.actual && e.expected &&
typeof e.actual === 'object' &&
typeof e.expected === 'object' &&
isArray(e.actual) === isArray(e.expected)) {
e.showDiff = true;
}
}
throw e;
}
});
expect.addAssertion('[not] to (throw|throw error|throw exception)', function (expect, subject, arg) {
this.errorMode = 'nested';
if (typeof subject !== 'function') {
throw new Error("Assertion '" + this.testDescription +
"' only supports functions");
}
var thrown = false;
var argType = typeof arg;
try {
subject();
} catch (e) {
var subject;
if (e._isUnexpected) {
subject = e.output.toString();
} else Iif (typeof e === 'string') {
subject = e;
} else {
subject = e.message;
}
if ('function' === argType) {
arg(e);
} else if ('string' === argType) {
expect(subject, '[not] to equal', arg);
} else if (isRegExp(arg)) {
expect(subject, '[not] to match', arg);
} else if (this.flags.not) {
expect.fail('threw: {0}', e._isUnexpected ? e.output : subject);
}
thrown = true;
}
this.errorMode = 'default';
if ('string' === argType || isRegExp(arg)) {
// in the presence of a matcher, ensure the `not` only applies to
// the matching.
expect(thrown, 'to be true');
} else {
expect(thrown, '[not] to be true');
}
});
expect.addAssertion('to be (a|an) [non-empty] (map|hash|object) whose values satisfy', function (expect, subject, callbackOrString) {
var callback;
if ('function' === typeof callbackOrString) {
callback = callbackOrString;
} else if ('string' === typeof callbackOrString) {
var args = Array.prototype.slice.call(arguments, 2);
callback = function (value) {
expect.apply(expect, [value].concat(args));
};
} else {
throw new Error('Assertion "' + this.testDescription + '" expects a function as argument');
}
this.errorMode = 'nested';
expect(subject, 'to be an object');
if (this.flags['non-empty']) {
expect(subject, 'to be non-empty');
}
this.errorMode = 'bubble';
var errors = {};
forEach(getKeys(subject), function (key, index) {
try {
callback(subject[key], index);
} catch (e) {
errors[key] = e;
}
});
var errorKeys = getKeys(errors);
if (errorKeys.length > 0) {
expect.fail(function (output) {
var subjectOutput = expect.inspect(subject);
output.error('failed expectation in');
if (subjectOutput.size().height > 1) {
output.nl();
} else {
output.sp();
}
subjectOutput.error(':');
output.block(subjectOutput).nl();
output.indentLines();
forEach(errorKeys, function (key, index) {
var error = errors[key];
output.i().text(key).text(': ');
Eif (error._isUnexpected) {
output.block(error.output);
} else {
output.block(output.clone().text(error.message));
}
if (index < errorKeys.length - 1) {
output.nl();
}
});
});
}
});
expect.addAssertion('to be (a|an) [non-empty] array whose items satisfy', function (expect, subject, callbackOrString) {
var callback;
if ('function' === typeof callbackOrString) {
callback = callbackOrString;
} else if ('string' === typeof callbackOrString) {
var args = Array.prototype.slice.call(arguments, 2);
callback = function (item) {
expect.apply(expect, [item].concat(args));
};
} else {
throw new Error('Assertion "' + this.testDescription + '" expects a function as argument');
}
this.errorMode = 'nested';
expect(subject, 'to be an array');
if (this.flags['non-empty']) {
expect(subject, 'to be non-empty');
}
this.errorMode = 'bubble';
expect(subject, 'to be a map whose values satisfy', callback);
});
forEach(['string', 'number', 'boolean', 'array', 'object', 'function', 'regexp', 'regex', 'regular expression'], function (type) {
expect.addAssertion('to be (a|an) [non-empty] array of ' + type + 's', function (expect, subject) {
expect(subject, 'to be an array whose items satisfy', function (item) {
expect(item, 'to be a', type);
});
if (this.flags['non-empty']) {
expect(subject, 'to be non-empty');
}
});
});
expect.addAssertion('to be (a|an) [non-empty] (map|hash|object) whose keys satisfy', function (expect, subject, callbackOrString) {
var callback;
if ('function' === typeof callbackOrString) {
this.errorMode = 'nested';
callback = callbackOrString;
} else if ('string' === typeof callbackOrString) {
var args = Array.prototype.slice.call(arguments, 2);
callback = function (key) {
expect.apply(expect, [key].concat(args));
};
} else {
throw new Error('Assertion "' + this.testDescription + '" expects a function as argument');
}
this.errorMode = 'nested';
expect(subject, 'to be an object');
if (this.flags['non-empty']) {
expect(subject, 'to be non-empty');
}
this.errorMode = 'bubble';
var errors = {};
forEach(getKeys(subject), function (key, index) {
try {
callback(key);
} catch (e) {
errors[key] = e;
}
});
var errorKeys = getKeys(errors);
if (errorKeys.length > 0) {
expect.fail(function (output) {
output.error('failed expectation on keys ')
.text(getKeys(subject).join(', '))
.error(':').nl()
.indentLines();
forEach(errorKeys, function (key, index) {
var error = errors[key];
output.i().text(key).text(': ');
Eif (error._isUnexpected) {
output.block(error.output);
} else {
output.block(output.clone().text(error.message));
}
Iif (index < errorKeys.length - 1) {
output.nl();
}
});
});
}
});
expect.addAssertion('to be canonical', function (expect, subject, stack) {
stack = stack || [];
var i;
for (i = 0 ; i < stack.length ; i += 1) {
if (stack[i] === subject) {
return;
}
}
if (subject && typeof subject === 'object') {
var keys = getKeys(subject);
for (i = 0 ; i < keys.length - 1 ; i += 1) {
expect(keys[i], 'to be less than', keys[i + 1]);
}
stack.push(subject);
forEach(keys, function (key) {
expect(subject[key], 'to be canonical', stack);
});
stack.pop(subject);
}
});
};
|