Issue #3044749 by amateescu, plach, Joseph Zhao: Drupal Core Update...

Issue #3044749 by amateescu, plach, Joseph Zhao: Drupal Core Update (8.7.0-beta1) - the "workspace" plugin does not exist

core/modules/workspaces/src/Entity/WorkspaceAssociation.php

@@ -50,8 +50,7 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
       ->setDescription(new TranslatableMarkup('The workspace of the referenced content.'))
       ->setSetting('target_type', 'workspace')
       ->setRequired(TRUE)
-      ->setRevisionable(TRUE)
-      ->addConstraint('workspace', []);
+      ->setRevisionable(TRUE);
 
     $fields['target_entity_type_id'] = BaseFieldDefinition::create('string')
       ->setLabel(new TranslatableMarkup('Content entity type ID'))

core/modules/workspaces/tests/src/Kernel/WorkspaceCRUDTest.php

@@ -7,6 +7,7 @@
 use Drupal\Tests\node\Traits\NodeCreationTrait;
 use Drupal\Tests\user\Traits\UserCreationTrait;
 use Drupal\workspaces\Entity\Workspace;
+use Drupal\workspaces\Entity\WorkspaceAssociation;
 
 /**
  * Tests CRUD operations for workspaces.
@@ -189,4 +190,28 @@ public function testDeletingWorkspaces() {
     $this->assertCount(0, $workspace_deleted);
   }
 
+  /**
+   * Tests workspace association validation.
+   *
+   * @covers \Drupal\workspaces\Entity\WorkspaceAssociation::validate
+   */
+  public function testWorkspaceAssociationValidation() {
+    $workspace = Workspace::create([
+      'id' => 'gibbon',
+      'label' => 'Gibbon',
+    ]);
+    $workspace->save();
+    $node = $this->createNode();
+
+    $workspace_association = WorkspaceAssociation::create([
+      'workspace' => $workspace,
+      'target_entity_type_id' => $node->getEntityTypeId(),
+      'target_entity_id' => $node->id(),
+      'target_entity_revision_id' => $node->getRevisionId(),
+    ]);
+
+    $violations = $workspace_association->validate();
+    $this->assertCount(0, $violations);
+  }
+
 }