}

  @Override
  protected void expectMissing(Entry<K, V>... entries) {
    for (Entry<K, V> entry : entries) {
      assertFalse("Should not contain entry " + entry, actualContents().contains(entry));
      assertFalse(
          "Should not contain key " + entry.getKey() + " mapped to value " + entry.getValue(),
          equal(getMap().get(entry.getKey()), entry.getValue()));
    }
  }

    assertThrows(NullPointerException.class, () -> getMap().putIfAbsent(null, v3()));
    expectUnchanged();
    expectNullKeyMissingWhenNullKeysUnsupported(
        "Should not contain null key after unsupported putIfAbsent(null, value)");
  }

  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
  public void testPutIfAbsent_nullValueUnsupportedAndKeyAbsent() {

    assertThrows(NullPointerException.class, () -> getMap().putIfAbsent(null, v3()));
    expectUnchanged();
    expectNullKeyMissingWhenNullKeysUnsupported(
        "Should not contain null key after unsupported putIfAbsent(null, value)");
  }

  @MapFeature.Require(value = SUPPORTS_PUT, absent = ALLOWS_NULL_VALUES)
  public void testPutIfAbsent_nullValueUnsupportedAndKeyAbsent() {

        assertEquals(4, labels.size());
        assertTrue(labels.contains("a"), "Expected " + labels + " to contain " + "a");
        assertTrue(labels.contains("b"), "Expected " + labels + " to contain " + "b");
        assertTrue(labels.contains("c"), "Expected " + labels + " to contain " + "c");
        assertTrue(labels.contains("d"), "Expected " + labels + " to contain " + "d");

        addEdge(graph, "a", "d");

        assertTrue("Content should be substantial", contentNew.length() > 100);

        // Verify it contains expected mapping fields
        assertTrue("Should contain properties definition", contentNew.contains("properties"));
    }

    /**
     * Test that both mapping and settings resources can be loaded simultaneously.

Let's first see how the normal API app would look like before adding the callback.

It will have a *path operation* that will receive an `Invoice` body, and a query parameter `callback_url` that will contain the URL for the callback.

This part is pretty normal, most of the code is probably already familiar to you:

{* ../../docs_src/openapi_callbacks/tutorial001_py310.py hl[7:11,34:51] *}

/// tip

        // toString uses Hexdump.toHexString(informationLevel, 3)
        assertTrue(str.contains(Hexdump.toHexString(level, 3)), "toString should contain hex level");
        assertTrue(str.contains("Trans2QueryFSInformation["), "should start with class name");
        assertTrue(str.contains(",informationLevel=0x"), "should contain level field marker");
    }

     * and that the expecption message contains the expected and actual <abbr>GAV</abbr>.
     *
     * @param expectedGAV the actual <abbr>GAV</abbr> that the exception message should contain
     * @param actualGAV the actual <abbr>GAV</abbr> that the exception message should contain
     */
    private void assertExceptionMessageContains(String expectedGAV, String actualGAV) {

        // the order of these two is non-deterministic, based on when they're added to the reactor.
        assertTrue(projects.contains(pluginProject), "Expected " + projects + " to contain " + pluginProject);
        assertTrue(
                projects.contains(pluginLevelDepProject),
                "Expected " + projects + " to contain " + pluginLevelDepProject);

        assertEquals(2, downstreamProjects.size());
        assertTrue(downstreamProjects.contains(dProject), "Expected " + downstreamProjects + " to contain " + dProject);
        assertTrue(downstreamProjects.contains(eProject), "Expected " + downstreamProjects + " to contain " + eProject);
    }

    @Test
    void testGetSortedProjects() throws DuplicateProjectException, CycleDetectedException {