Java By Comparison

Let JUnit Handle Exceptions

class LogbookTest {

    @Test
    void readLogbook() {
        Logbook logbook = new Logbook();

        try {
            List<String> entries = logbook.readAllEntries();
            Assertions.assertEquals(13, entries.size());
        } catch (IOException e) {
            Assertions.fail(e.getMessage());
        }
    }

    @Test
    void readLogbookFail() {
        Logbook logbook = new Logbook();

        try {
            logbook.readAllEntries();
            Assertions.fail("read should fail");
        } catch (IOException ignored) {}
    }
}

Tests and exceptions often go hand-in-hand. Tests ensure that no exceptions are thrown, or that a particular exception must be thrown.

Let’s look at the code. There’s two examples of tests that depend on exceptions in different ways. The first one ...