Which yeoman-test assertions are used to verify the contents of a file?

• A. assert.file and assert.textContents
• B. assert.fileContents and assert.file
• C. assert.directory and assert.file
• D. assert.file and assert.fileContents

Answer: (D)

Verifying a file’s contents is most reliable when you confirm both that the file exists and that its content matches what you expect. In Yeoman tests, you do this with two assertions: one to check the file is present, and another to verify its contents. The first assertion guarantees the file exists; the second reads the file and ensures it contains the expected text (you can use a string or a regular expression for matching). For example, after generating, you’d assert the file exists and then assert its contents match what you expect. This combination ensures you’re testing both creation and correctness of the file’s content. The other options either focus on directories or test contents without confirming the file’s existence, which can lead to incomplete validation.