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jspec.js
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jspec.js
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// JSpec - Core - Copyright TJ Holowaychuk <tj@vision-media.ca> (MIT Licensed)
;(function(){
JSpec = {
version : '3.1.3',
assert : true,
cache : {},
suites : [],
modules : [],
allSuites : [],
matchers : {},
stubbed : [],
options : {},
request : 'XMLHttpRequest' in this ? XMLHttpRequest : null,
stats : { specs: 0, assertions: 0, failures: 0, passes: 0, specsFinished: 0, suitesFinished: 0 },
/**
* Default context in which bodies are evaluated.
*
* Replace context simply by setting JSpec.context
* to your own like below:
*
* JSpec.context = { foo : 'bar' }
*
* Contexts can be changed within any body, this can be useful
* in order to provide specific helper methods to specific suites.
*
* To reset (usually in after hook) simply set to null like below:
*
* JSpec.context = null
*
*/
defaultContext : {
/**
* Return an object used for proxy assertions.
* This object is used to indicate that an object
* should be an instance of _object_, not the constructor
* itself.
*
* @param {function} constructor
* @return {hash}
* @api public
*/
an_instance_of : function(constructor) {
return { an_instance_of : constructor }
},
/**
* Load fixture at _path_.
*
* Fixtures are resolved as:
*
* - <path>
* - <path>.html
*
* @param {string} path
* @return {string}
* @api public
*/
fixture : function(path) {
if (JSpec.cache[path]) return JSpec.cache[path]
return JSpec.cache[path] =
JSpec.tryLoading(JSpec.options.fixturePath + '/' + path) ||
JSpec.tryLoading(JSpec.options.fixturePath + '/' + path + '.html')
}
},
// --- Objects
reporters : {
/**
* Report to server.
*
* Options:
* - uri specific uri to report to.
* - verbose weither or not to output messages
* - failuresOnly output failure messages only
*
* @api public
*/
Server : function(results, options) {
var uri = options.uri || 'http://' + window.location.host + '/results'
JSpec.post(uri, {
stats: JSpec.stats,
options: options,
results: map(results.allSuites, function(suite) {
if (suite.hasSpecs())
return {
description: suite.description,
specs: map(suite.specs, function(spec) {
return {
description: spec.description,
message: !spec.passed() ? spec.failure().message : null,
status: spec.requiresImplementation() ? 'pending' :
spec.passed() ? 'pass' :
'fail',
assertions: map(spec.assertions, function(assertion){
return {
passed: assertion.passed
}
})
}
})
}
})
})
if ('close' in main) main.close()
},
/**
* Default reporter, outputting to the DOM.
*
* Options:
* - reportToId id of element to output reports to, defaults to 'jspec'
* - failuresOnly displays only suites with failing specs
*
* @api public
*/
DOM : function(results, options) {
var id = option('reportToId') || 'jspec'
var report = document.getElementById(id)
var failuresOnly = option('failuresOnly')
var classes = results.stats.failures ? 'has-failures' : ''
if (!report) throw 'JSpec requires the element #' + id + ' to output its reports'
function bodyContents(body) {
return JSpec.
escape(JSpec.contentsOf(body)).
replace(/^ */gm, function(a){ return (new Array(Math.round(a.length / 3))).join(' ') }).
replace(/\r\n|\r|\n/gm, '<br/>')
}
report.innerHTML = '<div id="jspec-report" class="' + classes + '"><div class="heading"> \
<span class="passes">Passes: <em>' + results.stats.passes + '</em></span> \
<span class="failures">Failures: <em>' + results.stats.failures + '</em></span> \
<span class="passes">Duration: <em>' + results.duration + '</em> ms</span> \
</div><table class="suites">' + map(results.allSuites, function(suite) {
var displaySuite = failuresOnly ? suite.ran && !suite.passed() : suite.ran
if (displaySuite && suite.hasSpecs())
return '<tr class="description"><td colspan="2">' + escape(suite.description) + '</td></tr>' +
map(suite.specs, function(i, spec) {
return '<tr class="' + (i % 2 ? 'odd' : 'even') + '">' +
(spec.requiresImplementation() ?
'<td class="requires-implementation" colspan="2">' + escape(spec.description) + '</td>' :
(spec.passed() && !failuresOnly) ?
'<td class="pass">' + escape(spec.description)+ '</td><td>' + spec.assertionsGraph() + '</td>' :
!spec.passed() ?
'<td class="fail">' + escape(spec.description) +
map(spec.failures(), function(a){ return '<em>' + escape(a.message) + '</em>' }).join('') +
'</td><td>' + spec.assertionsGraph() + '</td>' :
'') +
'<tr class="body"><td colspan="2"><pre>' + bodyContents(spec.body) + '</pre></td></tr>'
}).join('') + '</tr>'
}).join('') + '</table></div>'
},
/**
* Terminal reporter.
*
* @api public
*/
Terminal : function(results, options) {
failuresOnly = option('failuresOnly')
print(color("\n Passes: ", 'bold') + color(results.stats.passes, 'green') +
color(" Failures: ", 'bold') + color(results.stats.failures, 'red') +
color(" Duration: ", 'bold') + color(results.duration, 'green') + " ms \n")
function indent(string) {
return string.replace(/^(.)/gm, ' $1')
}
each(results.allSuites, function(suite) {
var displaySuite = failuresOnly ? suite.ran && !suite.passed() : suite.ran
if (displaySuite && suite.hasSpecs()) {
print(color(' ' + suite.description, 'bold'))
each(suite.specs, function(spec){
var assertionsGraph = inject(spec.assertions, '', function(graph, assertion){
return graph + color('.', assertion.passed ? 'green' : 'red')
})
if (spec.requiresImplementation())
print(color(' ' + spec.description, 'blue') + assertionsGraph)
else if (spec.passed() && !failuresOnly)
print(color(' ' + spec.description, 'green') + assertionsGraph)
else if (!spec.passed())
print(color(' ' + spec.description, 'red') + assertionsGraph +
"\n" + indent(map(spec.failures(), function(a){ return a.message }).join("\n")) + "\n")
})
print("")
}
})
quit(results.stats.failures)
},
/**
* Console reporter.
*
* @api public
*/
Console : function(results, options) {
console.log('')
console.log('Passes: ' + results.stats.passes + ' Failures: ' + results.stats.failures)
each(results.allSuites, function(suite) {
if (suite.ran) {
console.group(suite.description)
each(suite.specs, function(spec){
var assertionCount = spec.assertions.length + ':'
if (spec.requiresImplementation())
console.warn(spec.description)
else if (spec.passed())
console.log(assertionCount + ' ' + spec.description)
else
console.error(assertionCount + ' ' + spec.description + ', ' + spec.failure().message)
})
console.groupEnd()
}
})
}
},
Assertion : function(matcher, actual, expected, negate) {
extend(this, {
message: '',
passed: false,
actual: actual,
negate: negate,
matcher: matcher,
expected: expected,
// Report assertion results
report : function() {
if (JSpec.assert)
this.passed ? JSpec.stats.passes++ : JSpec.stats.failures++
return this
},
// Run the assertion
run : function() {
// TODO: remove unshifting
expected.unshift(actual)
this.result = matcher.match.apply(this, expected)
this.passed = negate ? !this.result : this.result
if (!this.passed) this.message = matcher.message.call(this, actual, expected, negate, matcher.name)
return this
}
})
},
ProxyAssertion : function(object, method, times, negate) {
var self = this
var old = object[method]
// Proxy
object[method] = function(){
args = toArray(arguments)
result = old.apply(object, args)
self.calls.push({ args : args, result : result })
return result
}
// Times
this.times = {
once : 1,
twice : 2
}[times] || times || 1
extend(this, {
calls: [],
message: '',
defer: true,
passed: false,
negate: negate,
object: object,
method: method,
// Proxy return value
and_return : function(result) {
this.expectedResult = result
return this
},
// Proxy arguments passed
with_args : function() {
this.expectedArgs = toArray(arguments)
return this
},
// Check if any calls have failing results
anyResultsFail : function() {
return any(this.calls, function(call){
return self.expectedResult.an_instance_of ?
call.result.constructor != self.expectedResult.an_instance_of:
!equal(self.expectedResult, call.result)
})
},
// Check if any calls have passing results
anyResultsPass : function() {
return any(this.calls, function(call){
return self.expectedResult.an_instance_of ?
call.result.constructor == self.expectedResult.an_instance_of:
equal(self.expectedResult, call.result)
})
},
// Return the passing result
passingResult : function() {
return this.anyResultsPass().result
},
// Return the failing result
failingResult : function() {
return this.anyResultsFail().result
},
// Check if any arguments fail
anyArgsFail : function() {
return any(this.calls, function(call){
return any(self.expectedArgs, function(i, arg){
if (arg == null) return call.args[i] == null
return arg.an_instance_of ?
call.args[i].constructor != arg.an_instance_of:
!equal(arg, call.args[i])
})
})
},
// Check if any arguments pass
anyArgsPass : function() {
return any(this.calls, function(call){
return any(self.expectedArgs, function(i, arg){
return arg.an_instance_of ?
call.args[i].constructor == arg.an_instance_of:
equal(arg, call.args[i])
})
})
},
// Return the passing args
passingArgs : function() {
return this.anyArgsPass().args
},
// Return the failing args
failingArgs : function() {
return this.anyArgsFail().args
},
// Report assertion results
report : function() {
if (JSpec.assert)
this.passed ? ++JSpec.stats.passes : ++JSpec.stats.failures
return this
},
// Run the assertion
run : function() {
var methodString = 'expected ' + object.toString() + '.' + method + '()' + (negate ? ' not' : '' )
function times(n) {
return n > 2 ? n + ' times' : { 1: 'once', 2: 'twice' }[n]
}
if (this.expectedResult != null && (negate ? this.anyResultsPass() : this.anyResultsFail()))
this.message = methodString + ' to return ' + puts(this.expectedResult) +
' but ' + (negate ? 'it did' : 'got ' + puts(this.failingResult()))
if (this.expectedArgs && (negate ? !this.expectedResult && this.anyArgsPass() : this.anyArgsFail()))
this.message = methodString + ' to be called with ' + puts.apply(this, this.expectedArgs) +
' but was' + (negate ? '' : ' called with ' + puts.apply(this, this.failingArgs()))
if (negate ? !this.expectedResult && !this.expectedArgs && this.calls.length >= this.times : this.calls.length != this.times)
this.message = methodString + ' to be called ' + times(this.times) +
', but ' + (this.calls.length == 0 ? ' was not called' : ' was called ' + times(this.calls.length))
if (!this.message.length)
this.passed = true
return this
}
})
},
/**
* Specification Suite block object.
*
* @param {string} description
* @param {function} body
* @api private
*/
Suite : function(description, body) {
var self = this
extend(this, {
body: body,
description: description,
suites: [],
specs: [],
ran: false,
hooks: { 'before' : [], 'after' : [], 'before_each' : [], 'after_each' : [] },
// Add a spec to the suite
addSpec : function(description, body) {
var spec = new JSpec.Spec(description, body)
this.specs.push(spec)
JSpec.stats.specs++ // TODO: abstract
spec.suite = this
},
// Add a hook to the suite
addHook : function(hook, body) {
this.hooks[hook].push(body)
},
// Add a nested suite
addSuite : function(description, body) {
var suite = new JSpec.Suite(description, body)
JSpec.allSuites.push(suite)
suite.name = suite.description
suite.description = this.description + ' ' + suite.description
this.suites.push(suite)
suite.suite = this
},
// Invoke a hook in context to this suite
hook : function(hook) {
if (this.suite) this.suite.hook(hook)
each(this.hooks[hook], function(body) {
JSpec.evalBody(body, "Error in hook '" + hook + "', suite '" + self.description + "': ")
})
},
// Check if nested suites are present
hasSuites : function() {
return this.suites.length
},
// Check if this suite has specs
hasSpecs : function() {
return this.specs.length
},
// Check if the entire suite passed
passed : function() {
return !any(this.specs, function(spec){
return !spec.passed()
})
}
})
},
/**
* Specification block object.
*
* @param {string} description
* @param {function} body
* @api private
*/
Spec : function(description, body) {
extend(this, {
body: body,
description: description,
assertions: [],
// Add passing assertion
pass : function(message) {
this.assertions.push({ passed: true, message: message })
if (JSpec.assert) ++JSpec.stats.passes
},
// Add failing assertion
fail : function(message) {
this.assertions.push({ passed: false, message: message })
if (JSpec.assert) ++JSpec.stats.failures
},
// Run deferred assertions
runDeferredAssertions : function() {
each(this.assertions, function(assertion){
if (assertion.defer) assertion.run().report(), hook('afterAssertion', assertion)
})
},
// Find first failing assertion
failure : function() {
return find(this.assertions, function(assertion){
return !assertion.passed
})
},
// Find all failing assertions
failures : function() {
return select(this.assertions, function(assertion){
return !assertion.passed
})
},
// Weither or not the spec passed
passed : function() {
return !this.failure()
},
// Weither or not the spec requires implementation (no assertions)
requiresImplementation : function() {
return this.assertions.length == 0
},
// Sprite based assertions graph
assertionsGraph : function() {
return map(this.assertions, function(assertion){
return '<span class="assertion ' + (assertion.passed ? 'passed' : 'failed') + '"></span>'
}).join('')
}
})
},
Module : function(methods) {
extend(this, methods)
},
JSON : {
/**
* Generic sequences.
*/
meta : {
'\b' : '\\b',
'\t' : '\\t',
'\n' : '\\n',
'\f' : '\\f',
'\r' : '\\r',
'"' : '\\"',
'\\' : '\\\\'
},
/**
* Escapable sequences.
*/
escapable : /[\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
/**
* JSON encode _object_.
*
* @param {mixed} object
* @return {string}
* @api private
*/
encode : function(object) {
var self = this
if (object == undefined || object == null) return 'null'
if (object === true) return 'true'
if (object === false) return 'false'
switch (typeof object) {
case 'number': return object
case 'string': return this.escapable.test(object) ?
'"' + object.replace(this.escapable, function (a) {
return typeof self.meta[a] === 'string' ? self.meta[a] :
'\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4)
}) + '"' :
'"' + object + '"'
case 'object':
if (object.constructor == Array)
return '[' + map(object, function(val){
return self.encode(val)
}).join(', ') + ']'
else if (object)
return '{' + map(object, function(key, val){
return self.encode(key) + ':' + self.encode(val)
}).join(', ') + '}'
}
return 'null'
}
},
// --- DSLs
DSLs : {
snake : {
expect : function(actual){
return JSpec.expect(actual)
},
describe : function(description, body) {
return JSpec.currentSuite.addSuite(description, body)
},
it : function(description, body) {
return JSpec.currentSuite.addSpec(description, body)
},
before : function(body) {
return JSpec.currentSuite.addHook('before', body)
},
after : function(body) {
return JSpec.currentSuite.addHook('after', body)
},
before_each : function(body) {
return JSpec.currentSuite.addHook('before_each', body)
},
after_each : function(body) {
return JSpec.currentSuite.addHook('after_each', body)
},
should_behave_like : function(description) {
return JSpec.shareBehaviorsOf(description)
}
}
},
// --- Methods
/**
* Check if _value_ is 'stop'. For use as a
* utility callback function.
*
* @param {mixed} value
* @return {bool}
* @api public
*/
haveStopped : function(value) {
return value === 'stop'
},
/**
* Include _object_ which may be a hash or Module instance.
*
* @param {hash, Module} object
* @return {JSpec}
* @api public
*/
include : function(object) {
var module = object.constructor == JSpec.Module ? object : new JSpec.Module(object)
this.modules.push(module)
if ('init' in module) module.init()
if ('utilities' in module) extend(this.defaultContext, module.utilities)
if ('matchers' in module) this.addMatchers(module.matchers)
if ('reporters' in module) extend(this.reporters, module.reporters)
if ('DSLs' in module)
each(module.DSLs, function(name, methods){
JSpec.DSLs[name] = JSpec.DSLs[name] || {}
extend(JSpec.DSLs[name], methods)
})
return this
},
/**
* Add a module hook _name_, which is immediately
* called per module with the _args_ given. An array of
* hook return values is returned.
*
* @param {name} string
* @param {...} args
* @return {array}
* @api private
*/
hook : function(name, args) {
args = toArray(arguments, 1)
return inject(JSpec.modules, [], function(results, module){
if (typeof module[name] == 'function')
results.push(JSpec.evalHook(module, name, args))
})
},
/**
* Eval _module_ hook _name_ with _args_. Evaluates in context
* to the module itself, JSpec, and JSpec.context.
*
* @param {Module} module
* @param {string} name
* @param {array} args
* @return {mixed}
* @api private
*/
evalHook : function(module, name, args) {
hook('evaluatingHookBody', module, name)
try { return module[name].apply(module, args) }
catch(e) { error('Error in hook ' + module.name + '.' + name + ': ', e) }
},
/**
* Same as hook() however accepts only one _arg_ which is
* considered immutable. This function passes the arg
* to the first module, then passes the return value of the last
* module called, to the following module.
*
* @param {string} name
* @param {mixed} arg
* @return {mixed}
* @api private
*/
hookImmutable : function(name, arg) {
return inject(JSpec.modules, arg, function(result, module){
if (typeof module[name] == 'function')
return JSpec.evalHook(module, name, [result])
})
},
/**
* Find a suite by its description or name.
*
* @param {string} description
* @return {Suite}
* @api private
*/
findSuite : function(description) {
return find(this.allSuites, function(suite){
return suite.name == description || suite.description == description
})
},
/**
* Share behaviors (specs) of the given suite with
* the current suite.
*
* @param {string} description
* @api public
*/
shareBehaviorsOf : function(description) {
if (suite = this.findSuite(description)) this.copySpecs(suite, this.currentSuite)
else throw 'failed to share behaviors. ' + puts(description) + ' is not a valid Suite name'
},
/**
* Copy specs from one suite to another.
*
* @param {Suite} fromSuite
* @param {Suite} toSuite
* @api public
*/
copySpecs : function(fromSuite, toSuite) {
each(fromSuite.specs, function(spec){
spec.assertions = []
toSuite.specs.push(spec)
})
},
/**
* Convert arguments to an array.
*
* @param {object} arguments
* @param {int} offset
* @return {array}
* @api public
*/
toArray : function(arguments, offset) {
return Array.prototype.slice.call(arguments, offset || 0)
},
/**
* Return ANSI-escaped colored string.
*
* @param {string} string
* @param {string} color
* @return {string}
* @api public
*/
color : function(string, color) {
return "\u001B[" + {
bold : 1,
black : 30,
red : 31,
green : 32,
yellow : 33,
blue : 34,
magenta : 35,
cyan : 36,
white : 37
}[color] + 'm' + string + "\u001B[0m"
},
/**
* Default matcher message callback.
*
* @api private
*/
defaultMatcherMessage : function(actual, expected, negate, name) {
return 'expected ' + puts(actual) + ' to ' +
(negate ? 'not ' : '') +
name.replace(/_/g, ' ') +
' ' + (expected.length > 1 ?
puts.apply(this, expected.slice(1)) :
'')
},
/**
* Normalize a matcher message.
*
* When no messge callback is present the defaultMatcherMessage
* will be assigned, will suffice for most matchers.
*
* @param {hash} matcher
* @return {hash}
* @api public
*/
normalizeMatcherMessage : function(matcher) {
if (typeof matcher.message != 'function')
matcher.message = this.defaultMatcherMessage
return matcher
},
/**
* Normalize a matcher body
*
* This process allows the following conversions until
* the matcher is in its final normalized hash state.
*
* - '==' becomes 'actual == expected'
* - 'actual == expected' becomes 'return actual == expected'
* - function(actual, expected) { return actual == expected } becomes
* { match : function(actual, expected) { return actual == expected }}
*
* @param {mixed} body
* @return {hash}
* @api public
*/
normalizeMatcherBody : function(body) {
switch (body.constructor) {
case String:
if (captures = body.match(/^alias (\w+)/)) return JSpec.matchers[last(captures)]
if (body.length < 4) body = 'actual ' + body + ' expected'
return { match: function(actual, expected) { return eval(body) }}
case Function:
return { match: body }
default:
return body
}
},
/**
* Get option value. This method first checks if
* the option key has been set via the query string,
* otherwise returning the options hash value.
*
* @param {string} key
* @return {mixed}
* @api public
*/
option : function(key) {
return (value = query(key)) !== null ? value :
JSpec.options[key] || null
},
/**
* Check if object _a_, is equal to object _b_.
*
* @param {object} a
* @param {object} b
* @return {bool}
* @api private
*/
equal: function(a, b) {
if (typeof a != typeof b) return
if (a === b) return true
if (a instanceof RegExp)
return a.toString() === b.toString()
if (a instanceof Date)
return Number(a) === Number(b)
if (typeof a != 'object') return
if (a.length !== undefined)
if (a.length !== b.length) return
else
for (var i = 0, len = a.length; i < len; ++i)
if (!equal(a[i], b[i]))
return
for (var key in a)
if (!equal(a[key], b[key]))
return
return true
},
/**
* Return last element of an array.
*
* @param {array} array
* @return {object}
* @api public
*/
last : function(array) {
return array[array.length - 1]
},
/**
* Convert object(s) to a print-friend string.
*
* @param {...} object
* @return {string}
* @api public
*/
puts : function(object) {
if (arguments.length > 1)
return map(toArray(arguments), function(arg){
return puts(arg)
}).join(', ')
if (object === undefined) return 'undefined'
if (object === null) return 'null'
if (object === true) return 'true'
if (object === false) return 'false'
if (object.an_instance_of) return 'an instance of ' + object.an_instance_of.name
if (object.jquery && object.selector.length > 0) return 'selector ' + puts(object.selector)
if (object.jquery) return object.get(0).outerHTML
if (object.nodeName) return object.outerHTML
switch (object.constructor) {
case Function: return object.name || object
case String:
return '"' + object
.replace(/"/g, '\\"')
.replace(/\n/g, '\\n')
.replace(/\t/g, '\\t')
+ '"'
case Array:
return inject(object, '[', function(b, v){
return b + ', ' + puts(v)
}).replace('[,', '[') + ' ]'
case Object:
object.__hit__ = true
return inject(object, '{', function(b, k, v) {
if (k == '__hit__') return b
return b + ', ' + k + ': ' + (v && v.__hit__ ? '<circular reference>' : puts(v))
}).replace('{,', '{') + ' }'
default:
return object.toString()
}
},
/**
* Escape HTML.
*
* @param {string} html
* @return {string}
* @api public