Swiftpack.co - kylef/Spectre as Swift Package

Swiftpack.co is a collection of thousands of indexed Swift packages. Search packages.
See all packages published by kylef.
kylef/Spectre 0.10.1
BDD Framework and test runner for Swift projects and playgrounds
⭐️ 391
🕓 49 weeks ago
.package(url: "https://github.com/kylef/Spectre.git", from: "0.10.1")


Build Status

Special Executive for Command-line Test Running and Execution.

A behavior-driven development (BDD) framework and test runner for Swift projects and playgrounds. It's compatible with both OS X and Linux.


describe("a person") {
  let person = Person(name: "Kyle")

  $0.it("has a name") {
    try expect(person.name) == "Kyle"

  $0.it("returns the name as description") {
    try expect(person.description) == "Kyle"


Spectre currently has two built-in reporters, Standard and the Dot reporter. Custom reporters are supported, make a type that conforms to Reporter.

The default reporter can be configured via an environment variable. For example:

$ env SPECTRE_REPORTER=dot swift test
$ env SPECTRE_REPORTER=tap swift test


The standard reporter produces output as follows:

Passing Tests

Standard Reporter Success

Failing Tests

Standard Reporter Failure


Using the -t argument, you can use the dot reporter.

Passing Tests

Dot Reporter Success

Failing Tests

Dot Reporter Failure



try expect(name) == "Kyle"
try expect(name) != "Kyle"


try expect(alive).to.beTrue()
try expect(alive).to.beFalse()
try expect(alive).to.beNil()

Error handling

try expect(try write()).toThrow()
try expect(try write()).toThrow(FileError.NoPermission)


try expect(5) > 2
try expect(5) >= 2
try expect(5) < 10
try expect(5) <= 10


try expect("kyle").to.beOfType(String.self)

Causing a failure

throw failure("Everything is broken.")

Custom assertions

You can easily provide your own assertions, you just need to throw a failure when the assertion does not meet expectaions.


The following projects use Spectre:

Installation / Running

Swift Package Manager

Check out Commander as an example.


You can use Spectre in an Xcode Playground, open Spectre.playground in this repository, failures are printed in the console.

Spectre in an Xcode Playground


Stars: 391
Last commit: 48 weeks ago
jonrohan Something's broken? Yell at me @ptrpavlik. Praise and feedback (and money) is also welcome.

Release Notes

49 weeks ago
  • Prevents compilation error when building Spectre on Xcode 13.

Swiftpack is being maintained by Petr Pavlik | @ptrpavlik | @swiftpackco | API | Analytics