Issue #3091502 by Eli-T: Module has no tests

tests/src/Functional/JsonApiReferenceTest.php

+<?php
+
+namespace Drupal\Tests\jsonapi_reference\Functional;
+
+use Drupal\KernelTests\AssertConfigTrait;
+use Drupal\Tests\BrowserTestBase;
+
+/**
+ * Class JsonApiReferenceTest.
+ *
+ * @group jsonapi_reference
+ */
+class JsonApiReferenceTest extends BrowserTestBase {
+  use AssertConfigTrait;
+
+  /**
+   * {@inheritdoc}
+   */
+  static protected $modules = ['jsonapi_reference'];
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function setUp() {
+    parent::setUp();
+
+  }
+
+  /**
+   * Test configuration form protected by permissions.
+   *
+   * @throws \Behat\Mink\Exception\ExpectationException
+   * @throws \Drupal\Core\Entity\EntityStorageException
+   */
+  public function testConfigFormProtected() {
+    // Test anonymous users can't access the configuration screen.
+    $this->drupalGet('admin/config/jsonapi_reference');
+    $this->assertSession()->statusCodeEquals(403);
+
+    // Test a logged in user with no specific permissions can't access the
+    // configuration screen.
+    $person_of_no_significance = $this->createUser();
+    $this->drupalLogin($person_of_no_significance);
+    $this->drupalGet('admin/config/jsonapi_reference');
+    $this->assertSession()->statusCodeEquals(403);
+
+    $this->drupalLogout();
+
+    // Test a logged in user with the appropriate permission can access the
+    // configuration screen.
+    $person_of_appropriate_significance = $this->createUser(['configure jsonapi reference']);
+    $this->drupalLogin($person_of_appropriate_significance);
+    $this->drupalGet('admin/config/jsonapi_reference');
+    $this->assertSession()->statusCodeEquals(200);
+
+    $this->drupalLogout();
+  }
+
+}