createTypedData example

    $data = $this->typedDataManager->create($definition, $value, $name);
    $this->assertInstanceOf(TypedDataInterface::class, $data);
    return $data;
  }

  /** * Tests the basics around constructing and working with typed data objects. */
  public function testGetAndSet() {
    // Boolean type.     $typed_data = $this->createTypedData(['type' => 'boolean'], TRUE);
    $this->assertInstanceOf(BooleanInterface::class, $typed_data);
    $this->assertTrue($typed_data->getValue(), 'Boolean value was fetched.');
    $this->assertEquals(0, $typed_data->validate()->count());
    $typed_data->setValue(FALSE);
    $this->assertFalse($typed_data->getValue(), 'Boolean value was changed.');
    $this->assertEquals(0, $typed_data->validate()->count());
    $this->assertIsString($typed_data->getString());
    $typed_data->setValue(NULL);
    $this->assertNull($typed_data->getValue(), 'Boolean wrapper is null-able.');
    $this->assertEquals(0, $typed_data->validate()->count());
    $typed_data->setValue('invalid');