@Test public void testUnion() { assertEquals(union(new DoubleRange(1, 2), new DoubleRange(4, 5)), new DoubleRange(1, 5)); assertEquals(union(new DoubleRange(1, 2), new DoubleRange(1, 2)), new DoubleRange(1, 2)); assertEquals(union(new DoubleRange(4, 5), new DoubleRange(1, 2)), new DoubleRange(1, 5)); assertEquals(union(new DoubleRange(Double.NEGATIVE_INFINITY, 0), new DoubleRange(0, Double.POSITIVE_INFINITY)), new DoubleRange(Double.NEGATIVE_INFINITY, Double.POSITIVE_INFINITY)); assertEquals(union(new DoubleRange(0, Double.POSITIVE_INFINITY), new DoubleRange(Double.NEGATIVE_INFINITY, 0)), new DoubleRange(Double.NEGATIVE_INFINITY, Double.POSITIVE_INFINITY)); }