Sleipnir vs Concordion comparison of testing frameworks
What are the differences between Sleipnir and Concordion?

Sleipnir

https://github.com/railsware/Sleipnir

Concordion

https://concordion.org/
Programming language

Swift

Java

Category

Unit Testing, Acceptance Testing

General info

Sleipnir is a BDD-style framework for Swift

Sleipnir is a pure Swift BDD testing framework inspired by cedar, that is not dependent on NSObject, and does not use XCTest. Sleipnir has nice command line output and support for custom test reporters and other features, like seeded random tests invocation, focused and excluded examples/groups

Concordion is a tool used to write and manage automated acceptance tests in Java based projects

Concordion specifications are written in Markdown, HTML or Excel and then instrumented with special links, attributes or comments respectively. When the corresponding test fixture class is run, Concordion interprets the instrumentation to execute the test. Concordion lets you write them in normal language using paragraphs, tables and proper punctuation. This makes specification more natural to read and write, and helps everyone to understand and agree about what a feature is supposed to do.
xUnit
Set of frameworks originating from SUnit (Smalltalk's testing framework). They share similar structure and functionality.

N/A

No

Client-side
Allows testing code execution on the client, such as a web browser

Yes

You can test front-end behaviour by defining specifications for classes, objects and functions

Yes

You can specify tests for front-end components and functionality with concordion
Server-side
Allows testing the bahovior of a server-side code

Yes

You can test back-end behaviour by defining specifications for classes, objects and functions in the back-end

Yes

You can test server-side components and functionality with concordion.
Fixtures
Allows defining a fixed, specific states of data (fixtures) that are test-local. This ensures specific environment for a single test

Yes

Fixtures are available by using beforeEach{ } and afterEach{ } to setup the test parameters

Yes

Concordion contains fixtures which correspond to a specific instrumentation within the code. That is when specifications are written they are instrumented with special links, attributes or comments which are then run with their corresponding fixtures
Group fixtures
Allows defining a fixed, specific states of data for a group of tests (group-fixtures). This ensures specific environment for a given group of tests.

Yes

Group fixtures are available through the beforeAll{} and afterAll{} blocks to setup group fixtures

Yes

One can group fixtures in concordion
Generators
Supports data generators for tests. Data generators generate input data for test. The test is then run for each input data produced in this way.

N/A

N/A

Licence
Licence type governing the use and redistribution of the software

MIT License

Apache License 2.0

Mocks
Mocks are objects that simulate the behavior of real objects. Using mocks allows testing some part of the code in isolation (with other parts mocked when needed)

Yes

Yes, developers can create mock objects with sleipnir using a third party library like Cuckoo.

Yes

By use of third party libraries like mockito
Grouping
Allows organizing tests in groups

Yes

You can declare example groups with Slepnir

Yes

One can group tests into suites
Other
Other useful information about the testing framework