BDD Style Guide

Behavior Driven Development(BDD) Style Assertion

T.apex favors a BDD-style assertion like this:

T.expect(result).toBe(true);

Matchers

Here is a list of matchers used in T.apex.

Negate Matchers

Here is how we negate the matchers.

T.expect(result).never.toBe(null);

Manual Failing

Here is how we manually fail the test.

T.fail('Should fail here');

Asymmetric Matchers

Asymmetric matchers are a group of matchers that implements T.IMatcher, which usually contains asymmetric equality checking logic.

Here is how we use the asymmetric matchers.

T.expect(result).toEqual(T.objectOfAny(String.class));

Here is a list of the asymmetric matchers provided by T.apex.

Custom Asymmetric Matchers

We can also implement our custom asymmetric matchers.

public class CustomMatcher implements IMatcher {
    private String word;

    public CustomMatcher(String word) {
        this.word = word;
    }

    public String getMessage(Object other) {
        return 'Custom matcher fails';
    }

    public Boolean matches(Object other) {
        return this.word == other;
    }
}

T.expect(result).toEqual(new CustomMatcher('word'));