If the test passes, you'll see OK as above. If not, you'll get details about which test failed, and how the expected output (the first operand of the assertEqual method) differed from your code's output (the second operand).
If the test passes, you'll see OK as above. If not, you'll get details about which test failed, and how the expected output (the first operand of the assertEqual method) differed from your code's output (the second operand).