@Test
	public void testWithEmptyInputText() {
		try {
			PasswordUtils.maskPasswordsInDefinition(" ");
		}
		catch (IllegalArgumentException e) {
			assertEquals("definition must be neither empty nor null.", e.getMessage());
			return;
		}
		fail("Expected an IllegalArgumentException to be thrown.");
	}
Tests the functionality of {@link PasswordUtils#maskPasswordsInDefinition(String)}
ensuring that stream parameters named {@code password} or {@code passwd} are
sufficiently masked.

@author Gunnar Hillert
spring-xd-dirt/src/test/java/org/springframework/xd/dirt/rest/PasswordUtilsTests.java