class ProcessingTest

class ProcessingTest extends BrowserTestBase {
    
    /**
     * Modules to enable.
     *
     * @var array
     */
    protected static $modules = [
        'batch_test',
        'test_page_test',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'starterkit_theme';
    
    /**
     * Tests batches triggered outside of form submission.
     */
    public function testBatchNoForm() {
        // Displaying the page triggers batch 1.
        $this->drupalGet('batch-test/no-form');
        $this->assertBatchMessages($this->_resultMessages('batch_1'), 'Batch for step 2 performed successfully.');
        $this->assertEquals($this->_resultStack('batch_1'), batch_test_stack(), 'Execution order was correct.');
        $this->assertSession()
            ->pageTextContains('Redirection successful.');
    }
    
    /**
     * Tests batches that redirect in the batch finished callback.
     */
    public function testBatchRedirectFinishedCallback() {
        // Displaying the page triggers batch 1.
        $this->drupalGet('batch-test/finish-redirect');
        $this->assertBatchMessages($this->_resultMessages('batch_1'), 'Batch for step 2 performed successfully.');
        $this->assertEquals($this->_resultStack('batch_1'), batch_test_stack(), 'Execution order was correct.');
        // Verify that the custom redirection after batch execution displays the
        // correct page.
        $this->assertSession()
            ->pageTextContains('Test page text.');
        $this->assertSession()
            ->addressEquals(Url::fromRoute('test_page_test.test_page'));
    }
    
    /**
     * Tests batches defined in a form submit handler.
     */
    public function testBatchForm() {
        // Batch 0: no operation.
        $edit = [
            'batch' => 'batch_0',
        ];
        $this->drupalGet('batch-test');
        $this->submitForm($edit, 'Submit');
        // If there is any escaped markup it will include at least an escaped '<'
        // character, so assert on each page that there is no escaped '<' as a way
        // of verifying that no markup is incorrectly escaped.
        $this->assertSession()
            ->assertNoEscaped('<');
        $this->assertBatchMessages($this->_resultMessages('batch_0'), 'Batch with no operation performed successfully.');
        $this->assertSession()
            ->pageTextContains('Redirection successful.');
        // Batch 1: several simple operations.
        $edit = [
            'batch' => 'batch_1',
        ];
        $this->drupalGet('batch-test');
        $this->submitForm($edit, 'Submit');
        $this->assertSession()
            ->assertNoEscaped('<');
        $this->assertBatchMessages($this->_resultMessages('batch_1'), 'Batch with simple operations performed successfully.');
        $this->assertEquals($this->_resultStack('batch_1'), batch_test_stack(), 'Execution order was correct.');
        $this->assertSession()
            ->pageTextContains('Redirection successful.');
        // Batch 2: one multistep operation.
        $edit = [
            'batch' => 'batch_2',
        ];
        $this->drupalGet('batch-test');
        $this->submitForm($edit, 'Submit');
        $this->assertSession()
            ->assertNoEscaped('<');
        $this->assertBatchMessages($this->_resultMessages('batch_2'), 'Batch with multistep operation performed successfully.');
        $this->assertEquals($this->_resultStack('batch_2'), batch_test_stack(), 'Execution order was correct.');
        $this->assertSession()
            ->pageTextContains('Redirection successful.');
        // Batch 3: simple + multistep combined.
        $edit = [
            'batch' => 'batch_3',
        ];
        $this->drupalGet('batch-test');
        $this->submitForm($edit, 'Submit');
        $this->assertSession()
            ->assertNoEscaped('<');
        $this->assertBatchMessages($this->_resultMessages('batch_3'), 'Batch with simple and multistep operations performed successfully.');
        $this->assertEquals($this->_resultStack('batch_3'), batch_test_stack(), 'Execution order was correct.');
        $this->assertSession()
            ->pageTextContains('Redirection successful.');
        // Batch 4: nested batch.
        $edit = [
            'batch' => 'batch_4',
        ];
        $this->drupalGet('batch-test');
        $this->submitForm($edit, 'Submit');
        $this->assertSession()
            ->assertNoEscaped('<');
        $this->assertBatchMessages($this->_resultMessages('batch_4'), 'Nested batch performed successfully.');
        $this->assertEquals($this->_resultStack('batch_4'), batch_test_stack(), 'Execution order was correct.');
        $this->assertSession()
            ->pageTextContains('Redirection successful.');
        // Submit batches 4 and 7. Batch 4 will trigger batch 2. Batch 7 will
        // trigger batches 6 and 5.
        $edit = [
            'batch' => [
                'batch_4',
                'batch_7',
            ],
        ];
        $this->drupalGet('batch-test');
        $this->submitForm($edit, 'Submit');
        $this->assertSession()
            ->assertNoEscaped('<');
        $this->assertSession()
            ->responseContains('Redirection successful.');
        $this->assertBatchMessages($this->_resultMessages('batch_4'), 'Nested batch performed successfully.');
        $this->assertBatchMessages($this->_resultMessages('batch_7'), 'Nested batch performed successfully.');
        $expected_stack = array_merge($this->_resultStack('batch_4'), $this->_resultStack('batch_7'));
        $this->assertEquals($expected_stack, batch_test_stack(), 'Execution order was correct.');
        $batch = \Drupal::state()->get('batch_test_nested_order_multiple_batches');
        $this->assertCount(5, $batch['sets']);
        // Ensure correct queue mapping.
        foreach ($batch['sets'] as $index => $batch_set) {
            $this->assertEquals('drupal_batch:' . $batch['id'] . ':' . $index, $batch_set['queue']['name']);
        }
        // Ensure correct order of the nested batches. We reset the indexes in
        // order to directly access the batches by their order.
        $batch_sets = array_values($batch['sets']);
        $this->assertEquals('batch_4', $batch_sets[0]['batch_test_id']);
        $this->assertEquals('batch_2', $batch_sets[1]['batch_test_id']);
        $this->assertEquals('batch_7', $batch_sets[2]['batch_test_id']);
        $this->assertEquals('batch_6', $batch_sets[3]['batch_test_id']);
        $this->assertEquals('batch_5', $batch_sets[4]['batch_test_id']);
    }
    
    /**
     * Tests batches defined in a multistep form.
     */
    public function testBatchFormMultistep() {
        $this->drupalGet('batch-test/multistep');
        $this->assertSession()
            ->assertNoEscaped('<');
        $this->assertSession()
            ->pageTextContains('step 1');
        // First step triggers batch 1.
        $this->submitForm([], 'Submit');
        $this->assertBatchMessages($this->_resultMessages('batch_1'), 'Batch for step 1 performed successfully.');
        $this->assertEquals($this->_resultStack('batch_1'), batch_test_stack(), 'Execution order was correct.');
        $this->assertSession()
            ->pageTextContains('step 2');
        $this->assertSession()
            ->assertNoEscaped('<');
        // Second step triggers batch 2.
        $this->submitForm([], 'Submit');
        $this->assertBatchMessages($this->_resultMessages('batch_2'), 'Batch for step 2 performed successfully.');
        $this->assertEquals($this->_resultStack('batch_2'), batch_test_stack(), 'Execution order was correct.');
        $this->assertSession()
            ->pageTextContains('Redirection successful.');
        $this->assertSession()
            ->assertNoEscaped('<');
        // Extra query arguments will trigger logic that will add them to the
        // redirect URL. Make sure they are persisted.
        $this->drupalGet('batch-test/multistep', [
            'query' => [
                'big_tree' => 'small_axe',
            ],
        ]);
        $this->submitForm([], 'Submit');
        $this->assertSession()
            ->pageTextContains('step 2');
        $this->assertStringContainsString('batch-test/multistep?big_tree=small_axe', $this->getUrl(), 'Query argument was persisted and another extra argument was added.');
    }
    
    /**
     * Tests batches defined in different submit handlers on the same form.
     */
    public function testBatchFormMultipleBatches() {
        // Batches 1, 2 and 3 are triggered in sequence by different submit
        // handlers. Each submit handler modify the submitted 'value'.
        $value = rand(0, 255);
        $edit = [
            'value' => $value,
        ];
        $this->drupalGet('batch-test/chained');
        $this->submitForm($edit, 'Submit');
        // Check that result messages are present and in the correct order.
        $this->assertBatchMessages($this->_resultMessages('chained'), 'Batches defined in separate submit handlers performed successfully.');
        // The stack contains execution order of batch callbacks and submit
        // handlers and logging of corresponding $form_state->getValues().
        $this->assertEquals($this->_resultStack('chained', $value), batch_test_stack(), 'Execution order was correct, and $form_state is correctly persisted.');
        $this->assertSession()
            ->pageTextContains('Redirection successful.');
    }
    
    /**
     * Tests batches defined in a programmatically submitted form.
     *
     * Same as above, but the form is submitted through drupal_form_execute().
     */
    public function testBatchFormProgrammatic() {
        // Batches 1, 2 and 3 are triggered in sequence by different submit
        // handlers. Each submit handler modify the submitted 'value'.
        $value = rand(0, 255);
        $this->drupalGet('batch-test/programmatic/' . $value);
        // Check that result messages are present and in the correct order.
        $this->assertBatchMessages($this->_resultMessages('chained'), 'Batches defined in separate submit handlers performed successfully.');
        // The stack contains execution order of batch callbacks and submit
        // handlers and logging of corresponding $form_state->getValues().
        $this->assertEquals($this->_resultStack('chained', $value), batch_test_stack(), 'Execution order was correct, and $form_state is correctly persisted.');
        $this->assertSession()
            ->pageTextContains('Got out of a programmatic batched form.');
    }
    
    /**
     * Tests form submission during a batch operation.
     */
    public function testDrupalFormSubmitInBatch() {
        // Displaying the page triggers a batch that programmatically submits a
        // form.
        $value = rand(0, 255);
        $this->drupalGet('batch-test/nested-programmatic/' . $value);
        $this->assertEquals([
            'mock form submitted with value = ' . $value,
        ], batch_test_stack(), '\\Drupal::formBuilder()->submitForm() ran successfully within a batch operation.');
    }
    
    /**
     * Tests batches that return $context['finished'] > 1 do in fact complete.
     *
     * @see https://www.drupal.org/node/600836
     */
    public function testBatchLargePercentage() {
        // Displaying the page triggers batch 5.
        $this->drupalGet('batch-test/large-percentage');
        $this->assertBatchMessages($this->_resultMessages('batch_5'), 'Batch for step 2 performed successfully.');
        $this->assertEquals($this->_resultStack('batch_5'), batch_test_stack(), 'Execution order was correct.');
        $this->assertSession()
            ->pageTextContains('Redirection successful.');
    }
    
    /**
     * Triggers a pass if the texts were found in order in the raw content.
     *
     * @param $texts
     *   Array of raw strings to look for.
     *
     * @internal
     */
    public function assertBatchMessages(array $texts) : void {
        $pattern = '|' . implode('.*', $texts) . '|s';
        $this->assertSession()
            ->responseMatches($pattern);
    }
    
    /**
     * Returns expected execution stacks for the test batches.
     */
    public function _resultStack($id, $value = 0) {
        $stack = [];
        switch ($id) {
            case 'batch_1':
                for ($i = 1; $i <= 10; $i++) {
                    $stack[] = "op 1 id {$i}";
                }
                break;
            case 'batch_2':
                for ($i = 1; $i <= 10; $i++) {
                    $stack[] = "op 2 id {$i}";
                }
                break;
            case 'batch_3':
                for ($i = 1; $i <= 5; $i++) {
                    $stack[] = "op 1 id {$i}";
                }
                for ($i = 1; $i <= 5; $i++) {
                    $stack[] = "op 2 id {$i}";
                }
                for ($i = 6; $i <= 10; $i++) {
                    $stack[] = "op 1 id {$i}";
                }
                for ($i = 6; $i <= 10; $i++) {
                    $stack[] = "op 2 id {$i}";
                }
                break;
            case 'batch_4':
                for ($i = 1; $i <= 5; $i++) {
                    $stack[] = "op 1 id {$i}";
                }
                $stack[] = 'setting up batch 2';
                for ($i = 6; $i <= 10; $i++) {
                    $stack[] = "op 1 id {$i}";
                }
                $stack = array_merge($stack, $this->_resultStack('batch_2'));
                break;
            case 'batch_5':
                for ($i = 1; $i <= 10; $i++) {
                    $stack[] = "op 5 id {$i}";
                }
                break;
            case 'batch_6':
                for ($i = 1; $i <= 10; $i++) {
                    $stack[] = "op 6 id {$i}";
                }
                break;
            case 'batch_7':
                for ($i = 1; $i <= 5; $i++) {
                    $stack[] = "op 7 id {$i}";
                }
                $stack[] = 'setting up batch 6';
                $stack[] = 'setting up batch 5';
                for ($i = 6; $i <= 10; $i++) {
                    $stack[] = "op 7 id {$i}";
                }
                $stack = array_merge($stack, $this->_resultStack('batch_6'));
                $stack = array_merge($stack, $this->_resultStack('batch_5'));
                break;
            case 'chained':
                $stack[] = 'submit handler 1';
                $stack[] = 'value = ' . $value;
                $stack = array_merge($stack, $this->_resultStack('batch_1'));
                $stack[] = 'submit handler 2';
                $stack[] = 'value = ' . ($value + 1);
                $stack = array_merge($stack, $this->_resultStack('batch_2'));
                $stack[] = 'submit handler 3';
                $stack[] = 'value = ' . ($value + 2);
                $stack[] = 'submit handler 4';
                $stack[] = 'value = ' . ($value + 3);
                $stack = array_merge($stack, $this->_resultStack('batch_3'));
                break;
        }
        return $stack;
    }
    
    /**
     * Returns expected result messages for the test batches.
     */
    public function _resultMessages($id) {
        $messages = [];
        // The elapsed time should be either in minutes and seconds or only seconds.
        $pattern_elapsed = ' \\((\\d+ mins? )?\\d+ secs?\\)';
        switch ($id) {
            case 'batch_0':
                $messages[] = 'results for batch 0' . $pattern_elapsed . '<div class="item-list"><ul><li>none</li></ul></div>';
                break;
            case 'batch_1':
                $messages[] = 'results for batch 1' . $pattern_elapsed . '<div class="item-list"><ul><li>op 1: processed 10 elements</li></ul></div>';
                break;
            case 'batch_2':
                $messages[] = 'results for batch 2' . $pattern_elapsed . '<div class="item-list"><ul><li>op 2: processed 10 elements</li></ul></div>';
                break;
            case 'batch_3':
                $messages[] = 'results for batch 3' . $pattern_elapsed . '<div class="item-list"><ul><li>op 1: processed 10 elements</li><li>op 2: processed 10 elements</li></ul></div>';
                break;
            case 'batch_4':
                $messages[] = 'results for batch 4' . $pattern_elapsed . '<div class="item-list"><ul><li>op 1: processed 10 elements</li></ul></div>';
                $messages = array_merge($messages, $this->_resultMessages('batch_2'));
                break;
            case 'batch_5':
                $messages[] = 'results for batch 5' . $pattern_elapsed . '<div class="item-list"><ul><li>op 5: processed 10 elements</li></ul></div>';
                break;
            case 'batch_6':
                $messages[] = 'results for batch 6' . $pattern_elapsed . '<div class="item-list"><ul><li>op 6: processed 10 elements</li></ul></div>';
                break;
            case 'batch_7':
                $messages[] = 'results for batch 7' . $pattern_elapsed . '<div class="item-list"><ul><li>op 7: processed 10 elements</li></ul></div>';
                $messages = array_merge($messages, $this->_resultMessages('batch_6'));
                $messages = array_merge($messages, $this->_resultMessages('batch_5'));
                break;
            case 'chained':
                $messages = array_merge($messages, $this->_resultMessages('batch_1'));
                $messages = array_merge($messages, $this->_resultMessages('batch_2'));
                $messages = array_merge($messages, $this->_resultMessages('batch_3'));
                break;
        }
        return $messages;
    }

}