Cells represent the expected values, since the expected value of assertTrue is always true, only by entering (or removing) the text "true" into an assertTrue column will anything happen. The same is true with assertFalse(), assertNull(), assertNotNull(), fail(): false/ !null/ null/ failure.
The parameters must be entered before the test is written to the source buffer.
After clicking on the Add Test button the test hasn't been written to
the buffer yet. To be able to add assertions, you must first give the
test some parameter values.
Gray indicates unsaved changes. Once you save your change, the colors on the Test Editor changes.