map.put("bar", 4);
    assertEquals("[bar=1, foo=2, bar=3, bar=4]", map.entries().toString());
    assertThat(map.keys()).containsExactly("bar", "foo", "bar", "bar").inOrder();
    map.keys().remove("bar"); // bar is no longer the first key!
    assertEquals("{foo=[2], bar=[3, 4]}", map.toString());
  }

  public void testLinkedValues() {
    Multimap<String, Integer> map = create();
    map.put("bar", 1);
    map.put("foo", 2);

    assertThat(multimap.keySet()).containsExactly("foo", "bar", "cow").inOrder();
    assertThat(multimap.removeAll("foo")).containsExactly(6, 7).inOrder();
    assertThat(multimap.keySet()).containsExactly("bar", "cow").inOrder();
    assertTrue(multimap.remove("bar", 4));
    assertThat(multimap.keySet()).containsExactly("bar", "cow").inOrder();
    assertTrue(multimap.remove("bar", 1));
    assertThat(multimap.keySet()).contains("cow");

    assertEquals(Arrays.asList(4, 5), multimap.get("bar"));
    assertEquals(6, multimap.size());
  }

  public void testBuilderPutAllMultimapWithDuplicates() {
    Multimap<String, Integer> toPut = LinkedListMultimap.create();
    toPut.put("foo", 1);
    toPut.put("bar", 4);
    toPut.put("foo", 2);
    toPut.put("foo", 1);
    toPut.put("bar", 5);

    assertEquals(control("bar", 2), entry("bar", 2));
    assertFalse(control("foo", 1).equals(entry("foo", 2)));
    assertFalse(foo1.equals(control("bar", 1)));
    assertFalse(foo1.equals(new Object()));
    assertFalse(foo1.equals(null));
  }

  public void testEqualsNull() {
    assertEquals(control(NK, 1), entry(NK, 1));
    assertEquals(control("bar", NV), entry("bar", NV));

    assertEquals("[(bar,1)=b, (foo,1)=a, (foo,3)=c]", table.cellSet().toString());
  }

  public void testRowKeySetToString_ordered() {
    table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');
    assertEquals("[bar, foo]", table.rowKeySet().toString());
  }

  public void testValuesToString_ordered() {
    table = create("foo", 1, 'a', "bar", 1, 'b', "foo", 3, 'c');

    Table<Character, Integer, String> expectedTable = HashBasedTable.create();
    expectedTable.put('a', 1, "foo");
    expectedTable.put('b', 1, "bar");
    expectedTable.put('a', 2, "baz");
    Table<Character, Integer, String> otherTable = HashBasedTable.create();
    otherTable.put('b', 1, "bar");
    otherTable.put('a', 2, "baz");
    assertEquals(expectedTable, builder.putAll(otherTable).build());
  }

    assertEquals("bar x 2", entry("bar", 2).toString());
  }

  public void testToStringNull() {
    assertEquals("null", entry(NE, 1).toString());
    assertEquals("null x 2", entry(NE, 2).toString());
  }

  public void testEquals() {
    assertEquals(control("foo", 1), entry("foo", 1));
    assertEquals(control("bar", 2), entry("bar", 2));

    assertEquals("bar x 2", entry("bar", 2).toString());
  }

  public void testToStringNull() {
    assertEquals("null", entry(NE, 1).toString());
    assertEquals("null x 2", entry(NE, 2).toString());
  }

  public void testEquals() {
    assertEquals(control("foo", 1), entry("foo", 1));
    assertEquals(control("bar", 2), entry("bar", 2));

        Files.writeString(defPath, "foo=bar");
        Path envPath = userDirectory.resolve("env-ci.properties");
        Files.writeString(envPath, "foo=bar-env\nfoo-env=bar\n");

        Properties p = new Properties();
        p.put("user.home", userDirectory.toString());
        MavenPropertiesLoader.loadProperties(p, mavenUserProps, p::getProperty, false);
        assertEquals("bar", p.getProperty("foo"));

    assertEquals(Arrays.asList(4, 5), multimap.get("bar"));
    assertEquals(6, multimap.size());
  }

  public void testBuilderPutAllMultimapWithDuplicates() {
    Multimap<String, Integer> toPut = LinkedListMultimap.create();
    toPut.put("foo", 1);
    toPut.put("bar", 4);
    toPut.put("foo", 2);
    toPut.put("foo", 1);
    toPut.put("bar", 5);