test set elements

backend/tests/Unit/Set/SetTest.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace Tests\Unit\Set;
+
+use App\Set\Set as DomainSet;
+use Tests\TestCase;
+
+class SetTest extends TestCase
+{
+    public function testCreatesSetWithName(): void
+    {
+        $set = new DomainSet(1, 'Daily learning');
+
+        $this->assertSame(1, $set->getId());
+        $this->assertSame('Daily learning', $set->getName());
+    }
+}

backend/tests/Unit/Set/UseCases/CreateSetTest.php

@@ -0,0 +1,63 @@
+<?php
+
+namespace Tests\Unit\Set\UseCases;
+
+use App\Exceptions\BadRequestException;
+use App\Set\Set as DomainSet;
+use App\Set\UseCases\CreateSet\CreateSet;
+use App\Set\UseCases\CreateSet\CreateSetRequest;
+use Tests\Fakes\FakeElementRepository;
+use Tests\Fakes\FakeSetRepository;
+use Tests\TestCase;
+
+class CreateSetTest extends TestCase
+{
+    private FakeSetRepository $setRepo;
+
+    private FakeElementRepository $elementRepo;
+
+    private CreateSet $createSet;
+
+    protected function setUp(): void
+    {
+        $this->setRepo = new FakeSetRepository();
+        $this->elementRepo = new FakeElementRepository();
+        $this->createSet = new CreateSet(
+            $this->setRepo,
+            $this->elementRepo,
+        );
+    }
+
+    public function testCreatesSet(): void
+    {
+        $set = $this->createSet->execute(
+            new CreateSetRequest('Daily learning')
+        );
+
+        $this->assertInstanceOf(DomainSet::class, $set);
+        $this->assertSame(1, $set->getId());
+        $this->assertSame('Daily learning', $set->getName());
+    }
+
+    public function testCreatesRootElementForSet(): void
+    {
+        $set = $this->createSet->execute(
+            new CreateSetRequest('Daily learning')
+        );
+
+        $elements = $this->elementRepo->findBySetId($set->getId());
+
+        $this->assertCount(1, $elements);
+        $this->assertSame('Daily learning', $elements[0]->getTitle());
+        $this->assertSame($set->getId(), $elements[0]->getSet()->getId());
+        $this->assertNull($elements[0]->getParentElement());
+    }
+
+    public function testThrowsWhenNameMissing(): void
+    {
+        $this->expectException(BadRequestException::class);
+        $this->expectExceptionMessage('name is required');
+
+        $this->createSet->execute(new CreateSetRequest(null));
+    }
+}