Add tests for feature flags API

[MAILPOET-2008]

tests/integration/API/JSON/v1/FeatureFlagsTest.php

@@ -0,0 +1,140 @@
+<?php
+namespace MailPoet\Test\API\JSON\v1;
+
+use MailPoet\API\JSON\Error as APIError;
+use MailPoet\API\JSON\Response as APIResponse;
+use MailPoet\API\JSON\v1\FeatureFlags;
+use MailPoet\Features\FeatureFlagsController;
+use MailPoet\Features\FeaturesController;
+use MailPoet\Models\FeatureFlag;
+
+class FeatureFlagsTest extends \MailPoetTest {
+  /** @var array */
+  private $defaults_backup;
+
+  function _before() {
+    parent::_before();
+    FeatureFlag::deleteMany();
+    $this->defaults_backup = FeaturesController::$defaults;
+  }
+
+  function testItReturnsDefaults() {
+    FeaturesController::$defaults = [
+      'feature-a' => true,
+      'feature-b' => false,
+    ];
+
+    $controller = new FeatureFlagsController();
+    $endpoint = new FeatureFlags($controller);
+    expect($endpoint->getAll()->data)->equals([
+      [
+        'name' => 'feature-a',
+        'value' => true,
+        'default' => true,
+      ],
+      [
+        'name' => 'feature-b',
+        'value' => false,
+        'default' => false,
+      ],
+    ]);
+  }
+
+  function testItReturnsDatabaseValue() {
+    FeaturesController::$defaults = [
+      'feature-a' => true,
+    ];
+
+    FeatureFlag::createOrUpdate([
+      'name' => 'feature-a',
+      'value' => false,
+    ]);
+
+    $controller = new FeatureFlagsController();
+    $endpoint = new FeatureFlags($controller);
+
+    expect($endpoint->getAll()->data)->equals([
+      [
+        'name' => 'feature-a',
+        'value' => false,
+        'default' => true,
+      ],
+    ]);
+  }
+
+  function testItSetsDatabaseValue() {
+    FeaturesController::$defaults = [
+      'feature-a' => true,
+    ];
+
+    $controller = new FeatureFlagsController();
+    $endpoint = new FeatureFlags($controller);
+    $endpoint->set([
+      'feature-a' => false,
+    ]);
+
+    $features = FeatureFlag::where('name', 'feature-a')->findMany();
+    expect(count($features))->equals(1);
+    expect($features[0]->name)->equals('feature-a');
+    expect($features[0]->value)->equals('0');
+  }
+
+
+  function testItUpdatesDatabaseValue() {
+    FeaturesController::$defaults = [
+      'feature-a' => true,
+    ];
+
+    FeatureFlag::createOrUpdate([
+      'name' => 'feature-a',
+      'value' => false,
+    ]);
+
+    $controller = new FeatureFlagsController();
+    $endpoint = new FeatureFlags($controller);
+    $endpoint->set([
+      'feature-a' => true,
+    ]);
+
+    $features = FeatureFlag::where('name', 'feature-a')->findMany();
+    expect(count($features))->equals(1);
+    expect($features[0]->name)->equals('feature-a');
+    expect($features[0]->value)->equals('1');
+  }
+
+  function testItDoesNotReturnUnknownFlag() {
+    FeaturesController::$defaults = [];
+
+    FeatureFlag::createOrUpdate([
+      'name' => 'feature-unknown',
+      'value' => true,
+    ]);
+
+    $controller = new FeatureFlagsController();
+    $endpoint = new FeatureFlags($controller);
+
+    expect($endpoint->getAll()->data)->isEmpty();
+  }
+
+  function testItDoesNotSaveUnknownFlag() {
+    FeaturesController::$defaults = [];
+
+    $controller = new FeatureFlagsController();
+    $endpoint = new FeatureFlags($controller);
+    $response = $endpoint->set([
+      'feature-unknown' => false,
+    ]);
+
+    expect($response->errors[0]['error'])->equals(APIError::BAD_REQUEST);
+    expect($response->status)->equals(APIResponse::STATUS_BAD_REQUEST);
+
+    $features = FeatureFlag::findMany();
+    expect(count($features))->equals(0);
+  }
+
+  function _after() {
+    parent::_before();
+    FeatureFlag::deleteMany();
+    FeaturesController::$defaults = $this->defaults_backup;
+  }
+}