@Theory
    public void shouldDistinguishBetweenCollisionsWithGetAll(int size) {
        CaseInsensitiveStringMultiMap mmap = new CaseInsensitiveStringMultiMap(1);
        mmap.add("Access-Control-Allow-Origin", "*").add("Server", "WildFly/10");
        Assert.assertEquals(2, mmap.size());
        Assert.assertEquals(mmap.getAll("Access-Control-Allow-Origin").size(), 1);
        Assert.assertEquals(mmap.getAll("Access-Control-Allow-Origin").get(0), "*");
        Assert.assertEquals(mmap.getAll("Server").size(), 1);
    }
@author Marc Savy {@literal <msavy@redhat.com>}
gateway/engine/beans/src/test/java/io/apiman/gateway/engine/beans/util/CaseInsensitiveStringMultiMapTest.java