} catch (UnsupportedOperationException | NullPointerException e) {
        // Expected.
      }
    }
    assertInvariants(map);
  }

  public void testValues() {
    Map<K, V> map;
    try {
      map = makePopulatedMap();
    } catch (UnsupportedOperationException e) {
      return;
    }
    assertInvariants(map);

    assertEquals(1, loader.getCount());

    Object two = map.get(key, loader);
    assertNotSame(one, two);
    assertEquals(2, loader.getCount());
  }

  public void testValues() {
    LocalCache<Object, Object> map = makeLocalCache(createCacheBuilder());
    map.put("foo", "bar");
    map.put("baz", "bar");
    map.put("quux", "quux");
    assertFalse(map.values() instanceof Set);

    assertEquals(1, loader.getCount());

    Object two = map.get(key, loader);
    assertNotSame(one, two);
    assertEquals(2, loader.getCount());
  }

  public void testValues() {
    LocalCache<Object, Object> map = makeLocalCache(createCacheBuilder());
    map.put("foo", "bar");
    map.put("baz", "bar");
    map.put("quux", "quux");
    assertFalse(map.values() instanceof Set);

    public void test_empty() {
        final FieldConfigs fieldConfigs = new FieldConfigs(Collections.emptyMap());
        assertTrue(fieldConfigs.getConfig("test").isEmpty());
    }

    public void test_values() {
        final Map<String, String> params = Maps.of("foo", "bar");
        FieldConfigs fieldConfigs = new FieldConfigs(params);
        assertTrue(fieldConfigs.getConfig("test").isEmpty());

    @BeforeEach
    void onSetup() {
        // MockitoAnnotations.openMocks(this);

        Map<String, String> envVarMap = new HashMap<>();
        envVarMap.put("testKey", "testValue");
        envVarMap.put("testSpecialCharactersKey", "<test&Value>");
        OperatingSystemUtils.setEnvVarSource(new TestEnvVarSource(envVarMap));

        toolchainBuilder = new DefaultToolchainsBuilder(