@Test
void testToStringArrayMap() {

    MultiMap<String> mm = new MultiMap<>();
    mm.putValues("food", "apple", "cherry", "raspberry");
    mm.put("color", "red");
    mm.putValues("amount", "bushel", "pint");
    assertMapSize(mm, 3);
    Map<String, String[]> sam = mm.toStringArrayMap();
    assertEquals(3, sam.size());
    assertArray("toStringArrayMap(food)", sam.get("food"), "apple", "cherry", "raspberry");
    assertArray("toStringArrayMap(color)", sam.get("color"), "red");
    assertArray("toStringArrayMap(amount)", sam.get("amount"), "bushel", "pint");
}