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

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

tests/unit/Models/ArticleIdeaTest.php

@@ -0,0 +1,73 @@
+<?php
+/**
+ * Tests for PRAutoBlogger_Article_Idea value object.
+ *
+ * @package PRAutoBlogger\Tests\Models
+ */
+
+namespace PRAutoBlogger\Tests\Models;
+
+use PRAutoBlogger\Tests\BaseTestCase;
+
+class ArticleIdeaTest extends BaseTestCase {
+
+    protected function setUp(): void {
+        parent::setUp();
+        require_once PRAB_PLUGIN_DIR . 'includes/models/class-prab-article-idea.php';
+    }
+
+    /**
+     * Test construction with full data.
+     */
+    public function test_constructor_sets_all_properties(): void {
+        $idea = new \PRAutoBlogger_Article_Idea(
+            'The Future of BPC-157 Research',
+            'An in-depth look at recent clinical trials.',
+            [ 'BPC-157', 'clinical trials', 'peptides' ],
+            'peptide-research',
+            85.5
+        );
+
+        $this->assertSame( 'The Future of BPC-157 Research', $idea->get_title() );
+        $this->assertSame( 'An in-depth look at recent clinical trials.', $idea->get_description() );
+        $this->assertSame( [ 'BPC-157', 'clinical trials', 'peptides' ], $idea->get_keywords() );
+        $this->assertSame( 'peptide-research', $idea->get_category() );
+        $this->assertSame( 85.5, $idea->get_score() );
+    }
+
+    /**
+     * Test to_array returns all fields.
+     */
+    public function test_to_array_returns_complete_data(): void {
+        $idea = new \PRAutoBlogger_Article_Idea(
+            'Test Title',
+            'Test description.',
+            [ 'kw1' ],
+            'general',
+            50.0
+        );
+
+        $array = $idea->to_array();
+        $this->assertIsArray( $array );
+        $this->assertArrayHasKey( 'title', $array );
+        $this->assertArrayHasKey( 'description', $array );
+        $this->assertArrayHasKey( 'keywords', $array );
+        $this->assertArrayHasKey( 'category', $array );
+        $this->assertArrayHasKey( 'score', $array );
+    }
+
+    /**
+     * Test score can be zero.
+     */
+    public function test_allows_zero_score(): void {
+        $idea = new \PRAutoBlogger_Article_Idea(
+            'Low Score Idea',
+            'Not great.',
+            [],
+            'general',
+            0.0
+        );
+
+        $this->assertSame( 0.0, $idea->get_score() );
+    }
+}