public void CanWordBeSpelled_GivenBear_ShouldReturnTrue() { //arrange (test data) string incomingWord = "BEAR"; var firstBlockCreator = new BlockCreator(); var firstPile = firstBlockCreator.CreateBlocks(); var testInstance = new PuzzleSolver(); //action (do some work) bool isItSpellable = testInstance.CanWordBeSpelled(incomingWord, firstPile); //assert - check that the result of your action is that what you expected Assert.True(isItSpellable); }