Spectrum

A colorful BDD-style test runner for Java

Spectrum is inspired by the behavior-driven testing frameworks Jasmine and RSpec, bringing their expressive syntax and functional style to Java tests. It is a custom runner for JUnit, so it works with many development and reporting tools out of the box.

Getting Started

Spectrum 1.2.0 is available as a package on JCenter and Maven Central.

• Quickstart Guide
• Documentation
• Release Notes
• Source Code

Examples

Spectrum supports Specification-style tests similar to RSpec and Jasmine:

@RunWith(Spectrum.class)
public class Specs {{

  describe("A list", () -> {

    List<String> list = new ArrayList<>();

    afterEach(list::clear);

    it("should be empty by default", () -> {
      assertThat(list.size(), is(0));
    });

    it("should be able to add items", () -> {
      list.add("foo");
      list.add("bar");

      assertThat(list, contains("foo", "bar"));
    });

  });
}}

And also Gherkin-style tests similar to Cucumber:

@RunWith(Spectrum.class)
public class Features {{

  feature("Lists", () -> {

    scenario("adding items", () -> {

      Variable<List<String>> list = new Variable<>();

      given("an empty list", () -> {
        list.set(new ArrayList<>());
      });

      when("you add the item 'foo'", () -> {
        list.get().add("foo");
      });

      and("you add the item 'bar'", () -> {
        list.get().add("bar");
      });

      then("it contains both foo and bar", () -> {
        assertThat(list.get(), contains("foo", "bar"));
      });

    });

  });
}}

For more details and examples, see the documentation.

Can I Contribute?

Yes please! See CONTRIBUTING.md.