class BlockContentValidationTest

class BlockContentValidationTest extends BlockContentTestBase {
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * Tests the block content validation constraints.
   */
  public function testValidation() {
    // Add a block.
    $description = $this->randomMachineName();
    $block = $this->createBlockContent($description, 'basic');
    // Validate the block.
    $violations = $block->validate();
    // Make sure we have no violations.
    $this->assertCount(0, $violations);
    // Save the block.
    $block->save();
    // Add another block with the same description.
    $block = $this->createBlockContent($description, 'basic');
    // Validate this block.
    $violations = $block->validate();
    // Make sure we have 1 violation.
    $this->assertCount(1, $violations);
    // Make sure the violation is on the info property
    $this->assertEquals('info', $violations[0]->getPropertyPath());
    // Make sure the message is correct.
    $this->assertEquals(new FormattableMarkup('A custom block with Block description %value already exists.', [
      '%value' => $block->label(),
    ]), $violations[0]->getMessage());
  }

}