Add basic kernel tests for ID tag field.

modules/core/id_tag/tests/modules/farm_id_tag_test/config/install/asset.type.test.yml

@@ -0,0 +1,8 @@
+langcode: en
+status: true
+dependencies: {  }
+id: test
+label: Test
+description: ''
+workflow: asset_default
+new_revision: true

modules/core/id_tag/tests/modules/farm_id_tag_test/farm_id_tag_test.info.yml

@@ -0,0 +1,8 @@
+name: farmOS ID Tag Test
+description: Module for testing farmOS ID Tag field.
+type: module
+package: Testing
+core_version_requirement: ^9
+dependencies:
+  - farm:asset
+  - farm:farm_id_tag

modules/core/id_tag/tests/src/Kernel/IdTagTest.php

@@ -0,0 +1,83 @@
+<?php
+
+namespace Drupal\Tests\farm_id_tag\Kernel;
+
+use Drupal\asset\Entity\Asset;
+use Drupal\KernelTests\KernelTestBase;
+
+/**
+ * Test ID tag field.
+ *
+ * @group farm
+ */
+class IdTagTest extends KernelTestBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  protected static $modules = [
+    'asset',
+    'farm_field',
+    'farm_id_tag',
+    'farm_id_tag_test',
+    'state_machine',
+    'user',
+  ];
+
+  /**
+   * {@inheritdoc}
+   */
+  public function setUp(): void {
+    parent::setUp();
+    $this->installEntitySchema('asset');
+    $this->installConfig(['farm_id_tag', 'farm_id_tag_test']);
+  }
+
+  /**
+   * Test ID tag fields.
+   */
+  public function testIdTagField() {
+
+    // Test creating a new asset and saving ID tag information.
+    $asset = Asset::create([
+      'name' => $this->randomString(),
+      'type' => 'test',
+      'id_tag' => [
+        'id' => '123456',
+        'type' => 'other',
+        'location' => 'Frame',
+      ],
+    ]);
+    $violations = $asset->validate();
+    $this->assertEmpty($violations);
+    $asset->save();
+
+    // Confirm that the asset was created with expected ID tag values.
+    $assets = Asset::loadMultiple();
+    $this->assertCount(1, $assets);
+    $this->assertEquals('123456', $assets[1]->get('id_tag')->id);
+    $this->assertEquals('other', $assets[1]->get('id_tag')->type);
+    $this->assertEquals('Frame', $assets[1]->get('id_tag')->location);
+
+    // Confirm that all sub-fields are optional.
+    $asset = Asset::create([
+      'name' => $this->randomString(),
+      'type' => 'test',
+      'id_tag' => [],
+    ]);
+    $violations = $asset->validate();
+    $this->assertEmpty($violations);
+    $asset = Asset::create([
+      'name' => $this->randomString(),
+      'type' => 'test',
+      'id_tag' => [
+        'id' => '',
+        'type' => '',
+        'location' => '',
+      ],
+    ]);
+    $violations = $asset->validate();
+    $this->assertEmpty($violations);
+  }
+
+}