function StorageTest::testImmutableForm

Verifies that form build-id is regenerated when loading an immutable form from the cache.

File

core/modules/system/tests/src/Functional/Form/StorageTest.php, line 147

Class

StorageTest

Tests a multistep form using form storage and makes sure validation and caching works right.

Namespace

Code

public function testImmutableForm() {
    // Request the form with 'cache' query parameter to enable form caching.
    $this->drupalGet('form_test/form-storage', [
        'query' => [
            'cache' => 1,
            'immutable' => 1,
        ],
    ]);
    $buildIdFields = $this->xpath('//input[@name="form_build_id"]');
    $this->assertCount(1, $buildIdFields, 'One form build id field on the page');
    $buildId = $buildIdFields[0]->getValue();
    // Trigger validation error by submitting an empty title.
    $edit = [
        'title' => '',
    ];
    $this->drupalPostForm(NULL, $edit, 'Continue submit');
    // Verify that the build-id did change.
    $this->assertSession()
        ->hiddenFieldValueNotEquals('form_build_id', $buildId);
    // Retrieve the new build-id.
    $buildIdFields = $this->xpath('//input[@name="form_build_id"]');
    $this->assertCount(1, $buildIdFields, 'One form build id field on the page');
    $buildId = (string) $buildIdFields[0]->getValue();
    // Trigger validation error by again submitting an empty title.
    $edit = [
        'title' => '',
    ];
    $this->drupalPostForm(NULL, $edit, 'Continue submit');
    // Verify that the build-id does not change the second time.
    $this->assertSession()
        ->hiddenFieldValueEquals('form_build_id', $buildId);
}