Add unit test suite: 54 tests across models, core, and providers

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/unit/Models/ContentRequestTest.php

@@ -0,0 +1,70 @@
+<?php
+/**
+ * Tests for PRAutoBlogger_Content_Request value object.
+ *
+ * @package PRAutoBlogger\Tests\Models
+ */
+
+namespace PRAutoBlogger\Tests\Models;
+
+use PRAutoBlogger\Tests\BaseTestCase;
+
+class ContentRequestTest extends BaseTestCase {
+
+    protected function setUp(): void {
+        parent::setUp();
+        require_once PRAB_PLUGIN_DIR . 'includes/models/class-prab-content-request.php';
+    }
+
+    /**
+     * Test construction with required fields.
+     */
+    public function test_constructor_sets_all_properties(): void {
+        $request = new \PRAutoBlogger_Content_Request(
+            'Write about BPC-157 benefits',
+            'single_pass',
+            'google/gemini-2.0-flash-001',
+            [ 'tone' => 'informative', 'length' => 'long' ]
+        );
+
+        $this->assertSame( 'Write about BPC-157 benefits', $request->get_prompt() );
+        $this->assertSame( 'single_pass', $request->get_pipeline_mode() );
+        $this->assertSame( 'google/gemini-2.0-flash-001', $request->get_model() );
+        $this->assertSame( 'informative', $request->get_option( 'tone' ) );
+        $this->assertSame( 'long', $request->get_option( 'length' ) );
+    }
+
+    /**
+     * Test get_option returns default for missing keys.
+     */
+    public function test_get_option_returns_default_for_missing_key(): void {
+        $request = new \PRAutoBlogger_Content_Request(
+            'prompt',
+            'single_pass',
+            'model/name',
+            []
+        );
+
+        $this->assertNull( $request->get_option( 'nonexistent' ) );
+        $this->assertSame( 'fallback', $request->get_option( 'nonexistent', 'fallback' ) );
+    }
+
+    /**
+     * Test to_array completeness.
+     */
+    public function test_to_array_returns_all_fields(): void {
+        $request = new \PRAutoBlogger_Content_Request(
+            'test prompt',
+            'multi_step',
+            'model/x',
+            [ 'key' => 'val' ]
+        );
+
+        $array = $request->to_array();
+        $this->assertIsArray( $array );
+        $this->assertArrayHasKey( 'prompt', $array );
+        $this->assertArrayHasKey( 'pipeline_mode', $array );
+        $this->assertArrayHasKey( 'model', $array );
+        $this->assertArrayHasKey( 'options', $array );
+    }
+}