The first time this test is run, we will provide it with the values required to generate the correct snapshot of the Post view. The correct snapshot for this test case will contain the delete button when the user._id of the auth object is equal to the postedBy value of the post object. This snapshot generated when the test is first run will be used for comparison for future test executions.
Snapshot testing in Jest basically records snapshots of rendered component structures to compare them to future renderings. When the recorded snapshot and the current rendering don’t match, the test fails, indicating that something has changed.
