Assert.fail() java junit 4 code example

Example 1: junit 5 assert exception message

Throwable exceptionThatWasThrown = assertThrows(NullPointerException.class, () -> {
    codeThatThrows;
});

assertThat(exceptionThatWasThrown.getMessage(), equalTo("Message I expected to be thrown"));

Example 2: assert java

public void setup() {    Connection conn = getConnection();    assert conn != null;}