Book<\/code> contains information about an author and a title of the book.<\/p>\n\n\n\nclass Book { \n var title: String\n var author: String\n \n init(title: String, author: String) {\n self.title = title\n self.author = author\n } \n}\n<\/pre>\n\n\n\nLibrary<\/code> is a simple collection of books.<\/p>\n\n\n\nclass Library { \n var books: Book[]\n \n init() {\n self.books = Book[]()\n }\n \n func addBook(book: Book) {\n books.append(book)\n }\n \n func removeLastBook() {\n books.removeLast()\n }\n \n func clear() {\n books.removeAll()\n }\n \n func size() -> Int {\n return books.count\n }\n \n func hasBooks() -> Bool {\n return size() > 0\n }\n \n func filterBy(#author: String) -> Book[] {\n return books.filter { $0.author == author }\n }\n \n func filterBy(#title: String) -> Book[] {\n return books.filter { !$0.title.rangeOfString(title).isEmpty }\n }\n}\n<\/pre>\n\n\n\nFirst let’s test that instances of Book<\/code> are initialized correctly:<\/p>\n\n\n\nclass LibrarySpec : SleipnirSpec {\n \n var book : () = context(\"Book\") {\n \n var swiftBook: Book?\n beforeAll {\n swiftBook = Book(title: \"Introduction to Swift\", author: \"Apple Inc.\")\n }\n \n it(\"has title\") {\n expect(swiftBook!.title).to(equal(\"Introduction to Swift\"))\n }\n \n it(\"has author\") {\n expect(swiftBook!.author).to(equal(\"Apple Inc.\"))\n }\n }\n}\n<\/pre>\n\n\n\nWe’ve created a LibrarySpec<\/code> class which inherits from SleipnirSpec<\/code>. It has a main context and two examples which check properties of a created Book<\/code> instance.<\/p>\n\n\n\nAn instance of Book<\/code> is created in beforeAll{ }<\/code> block.<\/p>\n\n\n\nSleipnir supports several blocks for specs initialization: beforeAll<\/code>, afterAll<\/code>, beforeEach<\/code> and afterEach<\/code>.
All the top-level example groups in a spec should be assigned to a variable in order to evaluate:<\/p>\n\n\n\nvar book : () = context(\"Book\") { }\n<\/pre>\n\n\n\nNow let’s test a behaviour of a Library<\/code> class:<\/p>\n\n\n\nclass LibrarySpec : SleipnirSpec {\n \n ...\n\n var library : () = context(\"Library\") {\n \n var swiftLibrary: Library?\n beforeAll {\n swiftLibrary = Library()\n }\n \n afterAll {\n swiftLibrary = nil\n }\n \n describe(\"empty\") {\n it(\"has no books\") {\n expect(swiftLibrary!.hasBooks()).to(beFalse())\n }\n }\n \n describe(\"with books\") {\n \n beforeEach {\n swiftLibrary!.addBook(Book(title: \"Introduction to Swift\", author: \"Apple Inc.\"))\n swiftLibrary!.addBook(Book(title: \"Using Swift with Cocoa\", author: \"Apple Inc.\"))\n swiftLibrary!.addBook(Book(title: \"Swift tutorials\", author: \"John Doe\"))\n swiftLibrary!.addBook(Book(title: \"Programming iOS with Swift\", author: \"Vladimir Swiftin\"))\n }\n \n afterEach {\n swiftLibrary!.clear()\n }\n \n it(\"is not empty\") {\n expect(swiftLibrary!.hasBooks()).to(beTrue())\n }\n \n it(\"has correct number of books\") {\n expect(swiftLibrary!.size()).to(equal(4))\n swiftLibrary!.removeLastBook()\n expect(swiftLibrary!.size()).to(equal(3))\n }\n \n describe(\"filters books\") {\n it(\"by author\") {\n expect(swiftLibrary!.filterBy(author: \"Apple Inc.\").count).to(equal(2))\n }\n \n it(\"by title\") {\n expect(swiftLibrary!.filterBy(title: \"tutorials\").count).to(equal(1))\n }\n }\n }\n }\n}\n<\/pre>\n\n\n\nRunning those specs will produce the following command line output:<\/p>\n\n\n\n
Running With Random Seed: 657464010\n\n.......\n\n\nFinished in 0.0091 seconds\n\n7 examples, 0 failures\n<\/pre>\n\n\n\nIn case of a failed example you will see a detailed information about the failure including file and line number:<\/p>\n\n\n\n
Running With Random Seed: 2027508247\n\n..F....\n\nFAILURE Library with books has correct number of books:\n\/Users\/atermenji\/Coding\/objc\/Sleipnir\/Sample\/LibrarySpec.swift:64 Expected 3 to equal [2]\n\n\nFinished in 0.0043 seconds\n\n7 examples, 1 failures\n<\/pre>\n\n\n\nAs you can see we’ve tested the behaviour of a Library<\/code> class using simple expectations and matchers.
Sleipnir currently supports only three matchers: equal<\/code>, beTrue<\/code> and beFalse<\/code>, but more of them will be added soon.<\/p>\n\n\n\nWhat’s next<\/h3>\n\n\n\n
Since this is a first public release, a lot of features are not yet implemented. We have a roadmap for the nearest future which includes:<\/p>\n\n\n\n
- Distribution as a framework<\/li>
- Pending examples support<\/li>
- Focused and excluded examples\/groups support implementation<\/li>
- XCode templates<\/li>
- Shared examples support<\/li>
should<\/code> syntax support<\/li>- Specs for Sleipnir using Sleipnir<\/li>
- Wiki documentation<\/li>
- More matchers, including:\n
\nbeNil<\/code><\/li>\nbeGreaterThan<\/code>, beLessThan<\/code>, beInRangeOf<\/code><\/li>\n- asynchronous matchers (
will<\/code>, willNot<\/code>, after<\/code>)<\/li>\n- matchers on collections\/strings (
contains<\/code>, haveCount<\/code>, beginWith<\/code>, endWith<\/code>, etc.)<\/li>\n<\/ul>\n<\/li><\/ul>\n\n\n\nYou may post your ideas or issues to the Sleipnir repo<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"Introduction In Objective-C people use different frameworks to write BDD-style tests for their code. Some of them are: CedarKiwiSpecta With the inroduction of Swift we’ve decided to create BDD-style testing framework in pure Swift.After a couple weeks of implementation we are making the first public version of the framework called Sleipnir.Sleipnir is highly inspired by…<\/p>\n","protected":false},"author":58,"featured_media":9466,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[3],"tags":[],"coauthors":["Artur Termenji"],"class_list":["post-7033","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-development"],"acf":[],"aioseo_notices":[],"categories_data":[{"name":"Engineering","link":"https:\/\/railsware.com\/blog?category=development"}],"post_thumbnails":"https:\/\/railsware.com\/blog\/wp-content\/themes\/railsware\/vendors\/images\/article-thumbnail-default.jpg","amp_enabled":true,"_links":{"self":[{"href":"https:\/\/railsware.com\/blog\/wp-json\/wp\/v2\/posts\/7033","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/railsware.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/railsware.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/railsware.com\/blog\/wp-json\/wp\/v2\/users\/58"}],"replies":[{"embeddable":true,"href":"https:\/\/railsware.com\/blog\/wp-json\/wp\/v2\/comments?post=7033"}],"version-history":[{"count":27,"href":"https:\/\/railsware.com\/blog\/wp-json\/wp\/v2\/posts\/7033\/revisions"}],"predecessor-version":[{"id":14090,"href":"https:\/\/railsware.com\/blog\/wp-json\/wp\/v2\/posts\/7033\/revisions\/14090"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/railsware.com\/blog\/wp-json\/wp\/v2\/media\/9466"}],"wp:attachment":[{"href":"https:\/\/railsware.com\/blog\/wp-json\/wp\/v2\/media?parent=7033"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/railsware.com\/blog\/wp-json\/wp\/v2\/categories?post=7033"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/railsware.com\/blog\/wp-json\/wp\/v2\/tags?post=7033"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/railsware.com\/blog\/wp-json\/wp\/v2\/coauthors?post=7033"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}