@Test
    void requireThatIsTrueWorksAsExpected() {
        Headers headers = new Headers();
        assertFalse(headers.isTrue("foo"));
        headers.put("foo", List.of("true"));
        assertTrue(headers.isTrue("foo"));
        headers.put("foo", List.of("true", "true"));
        assertTrue(headers.isTrue("foo"));
        headers.put("foo", List.of("true", "false"));
        assertFalse(headers.isTrue("foo"));
        headers.put("foo", List.of("false", "true"));
        assertFalse(headers.isTrue("foo"));
        headers.put("foo", List.of("false", "false"));
        assertFalse(headers.isTrue("foo"));
        headers.put("foo", List.of("false"));
        assertFalse(headers.isTrue("foo"));
    }
@author Simon Thoresen Hult
@author Einar M R Rosenvinge
application/src/test/java/com/yahoo/application/container/handler/HeadersTestCase.java