Method containsKeyNullTest

lab07/tests/TestBSTMap.java:88–94

()

    // Assumes `put` is implemented properly. This test is a bit tricky - remember that
    // `containsKey` should only care about the keys, not the values!
    @Test
    public void containsKeyNullTest() {
        BSTMap<String, Integer> b = new BSTMap<>();
        b.put("hi", null);
        assertThat(b.get("hi")).isNull();
        assertThat(b.containsKey("hi")).isTrue();
    }

    @Test
    public void treeTest() {