For is shorthand for assert.To(t).For(msg, args...).

To creates an assertion manager using the target t for logging.

Error is used for things that cause test failures but do not abort.

Fatal is used for failures that cause the running test to immediately stop.

Log is the informational level.

OnBoolean is the result of calling ThatBoolean on an Assertion.

OnDuration is the result of calling ThatDuration on an Assertion.

OnEnum is the result of calling ThatEnum on an Assertion.

OnError is the result of calling ThatError on an Assertion.

OnFloat is the result of calling ThatFloat on an Assertion.

OnInteger is the result of calling ThatInt on an Assertion.

OnMap is the result of calling ThatMap on an Assertion.

OnSlice is the result of calling ThatSlice on an Assertion.

OnString is the result of calling ThatString on an Assertion.

OnValue is the result of calling That on an Assertion.

Enum is the interface for something that acts like an enumeration value.