@Theory
    public void shouldReturnEmptySetWhenNoEntries(int size) {
        CaseInsensitiveStringMultiMap actual = new CaseInsensitiveStringMultiMap(size);
        Assert.assertEquals(Collections.emptyList(), actual.getAllEntries("Foo"));
        Assert.assertEquals(Collections.emptyList(), actual.getAll("Foo"));
        actual.put("Not", "Thingie");
        Assert.assertEquals(Collections.emptyList(), actual.getAllEntries("Foo"));
        Assert.assertEquals(Collections.emptyList(), actual.getAll("Foo"));
    }
@author Marc Savy {@literal <msavy@redhat.com>}
gateway/engine/beans/src/test/java/io/apiman/gateway/engine/beans/util/CaseInsensitiveStringMultiMapTest.java