@Theory
    public void shouldAddAllEntriesFromMultiMap(int size) {
        CaseInsensitiveStringMultiMap putMap = new CaseInsensitiveStringMultiMap(size);
        putMap.add("foo", "bar").add("api", "man").add("marc", "red-hat").add("marc", "savy");

        CaseInsensitiveStringMultiMap actual = new CaseInsensitiveStringMultiMap(size);
        actual.addAll(putMap);

        Assert.assertEquals(
                expected(ent("foo", "bar"), ent("api", "man"), ent("marc", "red-hat"), ent("marc", "savy")),
                toSet(actual.getEntries()));
    }
@author Marc Savy {@literal <msavy@redhat.com>}
gateway/engine/beans/src/test/java/io/apiman/gateway/engine/beans/util/CaseInsensitiveStringMultiMapTest.java