Then it would be very easy to provide a different settings object during testing by creating a dependency override for `get_settings`:

{* ../../docs_src/settings/app02_an_py39/test_main.py hl[9:10,13,21] *}

In the dependency override we set a new value for the `admin_email` when creating the new `Settings` object, and then we return that new object.

Then we can test that it is used.

    //                                                                              ======
    @Override
    public Map<String, Object> toSource() {
        Map<String, Object> sourceMap = new HashMap<>();
        if (createdBy != null) {
            addFieldToSource(sourceMap, "createdBy", createdBy);
        }
        if (createdTime != null) {

    var closed = false

    val body: ResponseBody =
      object : ResponseBody() {
        override fun contentType(): MediaType? = null

        override fun contentLength(): Long = 5

        override fun source(): BufferedSource {
          val source = Buffer().writeUtf8("hello")
          return object : ForwardingSource(source) {
            override fun close() {
              closed = true

            "schemas": {
                "Body_create_files_files__post": {
                    "title": "Body_create_files_files__post",
                    "required": ["files"],
                    "type": "object",
                    "properties": {
                        "files": {
                            "title": "Files",
                            "type": "array",

        "components": {
            "schemas": {
                "ValidationError": {
                    "title": "ValidationError",
                    "required": ["loc", "msg", "type"],
                    "type": "object",
                    "properties": {
                        "loc": {
                            "title": "Location",
                            "type": "array",
                            "items": {

    // it still should only have executed twice due to memoization
    assertEquals(2, countingSupplier.calls);
  }

  public void testOfInstanceSuppliesSameInstance() {
    Object toBeSupplied = new Object();
    Supplier<Object> objectSupplier = Suppliers.ofInstance(toBeSupplied);
    assertSame(toBeSupplied, objectSupplier.get());
    assertSame(toBeSupplied, objectSupplier.get()); // idempotent
  }

    // it still should only have executed twice due to memoization
    assertEquals(2, countingSupplier.calls);
  }

  public void testOfInstanceSuppliesSameInstance() {
    Object toBeSupplied = new Object();
    Supplier<Object> objectSupplier = Suppliers.ofInstance(toBeSupplied);
    assertSame(toBeSupplied, objectSupplier.get());
    assertSame(toBeSupplied, objectSupplier.get()); // idempotent
  }

        // nothing
    }

    @Override
    public void invokeQuery(String columnFlexibleName, String conditionKeyName, Object conditionValue, ConditionOption conditionOption) {
        // nothing
    }

    @Override
    public void invokeQueryEqual(String columnFlexibleName, Object conditionValue) {
        // nothing
    }

        // nothing
    }

    @Override
    public void invokeQuery(String columnFlexibleName, String conditionKeyName, Object conditionValue, ConditionOption conditionOption) {
        // nothing
    }

    @Override
    public void invokeQueryEqual(String columnFlexibleName, Object conditionValue) {
        // nothing
    }

        }
      };

  enum NullListener implements RemovalListener<Object, Object> {
    INSTANCE;

    @Override
    public void onRemoval(RemovalNotification<Object, Object> notification) {}
  }

  enum OneWeigher implements Weigher<Object, Object> {
    INSTANCE;

    @Override
    public int weigh(Object key, Object value) {
      return 1;
    }
  }