assertTrue(infoString.contains("alloc=1000"), "toString should contain alloc");
        assertTrue(infoString.contains("free=500"), "toString should contain free");
        assertTrue(infoString.contains("sectPerAlloc=100"), "toString should contain sectPerAlloc");
        assertTrue(infoString.contains("bytesPerSect=512"), "toString should contain bytesPerSect");
    }

  }

  protected void expectMissingKeys(K... elements) {
    for (K element : elements) {
      assertFalse("Should not contain key " + element, getMap().containsKey(element));
    }
  }

  protected void expectMissingValues(V... elements) {
    for (V element : elements) {
      assertFalse("Should not contain value " + element, getMap().containsValue(element));
    }
  }

  /**

        assertTrue(resultString.contains("status=0"), "toString should contain the status.");
        assertTrue(resultString.contains("converter=13330"), "toString should contain the converter.");
        assertTrue(resultString.contains("entriesReturned=2"), "toString should contain the number of entries.");
        assertTrue(resultString.contains("totalAvailableEntries=5"), "toString should contain the total available entries.");
    }

    /**

        assertEquals(1, pairs.size(), "Should have 1 pair after removal");
        assertFalse(AvPairs.contains(pairs, AvPair.MsvAvFlags), "Should not contain MsvAvFlags");
        assertTrue(AvPairs.contains(pairs, AvPair.MsvAvTimestamp), "Should still contain MsvAvTimestamp");
    }

    /**
     * Test remove method with non-existing type
     */
    @Test

        String s = session.toString();
        assertTrue(s.contains("accountName="), "toString should contain accountName");
        assertTrue(s.contains("primaryDomain="), "toString should contain primaryDomain");
        assertTrue(s.contains("uid="), "toString should contain uid");
    }

    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_nullValueUnsupported() {

    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() {

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.py hl[9:13,36:53] *}

/// tip

        String ts = ex.toString();
        assertTrue(ts.contains("SmbUnsupportedOperationException"), "toString should contain class name");
        if (msg != null) {
            assertTrue(ts.contains(msg), "toString should contain provided message");
        } else {
            assertFalse(ts.contains(":"), "toString should not contain ':' when message is null");
        }
    }

    @Test

        // Check for sorted concatenated strings
        assertTrue("Result should contain sorted tags", result.contains("aaammmzzz"));
        assertTrue("Result should contain sorted roles", result.contains("role1role2role3"));
        assertTrue("Result should contain sorted fields", result.contains("field1field2field3"));
        assertTrue("Result should contain sorted excludes", result.contains("exclude1exclude2exclude3"));
    }