@Test
    void requireThatSizeWorksAsExpected() {
        Headers headers = new Headers();
        assertEquals(0, headers.size());
        headers.add("foo", "bar");
        assertEquals(1, headers.size());
        headers.add("foo", "baz");
        assertEquals(1, headers.size());
        headers.add("bar", "baz");
        assertEquals(2, headers.size());
        headers.remove("foo");
        assertEquals(1, headers.size());
        headers.remove("bar");
        assertEquals(0, headers.size());
    }
@author Simon Thoresen Hult
@author Einar M R Rosenvinge
application/src/test/java/com/yahoo/application/container/handler/HeadersTestCase.java