private void assertMapType(OpenType<?> mapType, OpenType<?> keyType, OpenType<?> valueType) {
TabularType type = assertCast(TabularType.class, mapType);
Assert.assertEquals(1, type.getIndexNames().size());
Assert.assertEquals("key", type.getIndexNames().get(0));
Assert.assertEquals(2, type.getRowType().keySet().size());
Assert.assertTrue(type.getRowType().keySet().contains("key"));
Assert.assertTrue(type.getRowType().keySet().contains("value"));
Assert.assertEquals(keyType, type.getRowType().getType("key"));
Assert.assertEquals(valueType, type.getRowType().getType("value"));
}