test: add snake case relation tests

Author: laylatichy

tests/Integration/Database/ModelInspector/SnakeCaseRelationTest.php

@@ -0,0 +1,132 @@
+<?php
+
+namespace Tests\Tempest\Integration\Database\ModelInspector;
+
+use Tempest\Database\BelongsTo;
+use Tempest\Database\Config\DatabaseDialect;
+use Tempest\Database\HasMany;
+use Tempest\Database\HasOne;
+use Tempest\Database\PrimaryKey;
+use Tempest\Database\Table;
+use Tests\Tempest\Integration\FrameworkIntegrationTestCase;
+
+use function Tempest\Database\inspect;
+
+final class SnakeCaseRelationTest extends FrameworkIntegrationTestCase
+{
+    public function test_belongs_to_with_snake_case_property(): void
+    {
+        $model = inspect(model: SnakeCaseBookModel::class);
+        $relation = $model->getRelation(name: 'main_author');
+
+        $this->assertInstanceOf(
+            expected: BelongsTo::class,
+            actual: $relation,
+        );
+        $this->assertSame(
+            expected: 'LEFT JOIN author ON author.id = book.author_id',
+            actual: $relation
+                ->getJoinStatement()
+                ->compile(dialect: DatabaseDialect::SQLITE),
+        );
+    }
+
+    public function test_has_one_with_snake_case_property(): void
+    {
+        $model = inspect(model: SnakeCaseAuthorModel::class);
+        $relation = $model->getRelation(name: 'author_profile');
+
+        $this->assertInstanceOf(
+            expected: HasOne::class,
+            actual: $relation,
+        );
+        $this->assertSame(
+            expected: 'LEFT JOIN profile ON profile.author_id = author.id',
+            actual: $relation
+                ->getJoinStatement()
+                ->compile(dialect: DatabaseDialect::SQLITE),
+        );
+    }
+
+    public function test_has_many_with_snake_case_property(): void
+    {
+        $model = inspect(model: SnakeCaseAuthorModel::class);
+        $relation = $model->getRelation(name: 'written_books');
+
+        $this->assertInstanceOf(
+            expected: HasMany::class,
+            actual: $relation,
+        );
+        $this->assertSame(
+            expected: 'LEFT JOIN book ON book.author_id = author.id',
+            actual: $relation
+                ->getJoinStatement()
+                ->compile(dialect: DatabaseDialect::SQLITE),
+        );
+    }
+
+    public function test_snake_case_property_is_recognized_as_relation(): void
+    {
+        $model = inspect(model: SnakeCaseBookModel::class);
+
+        $this->assertTrue(condition: $model->isRelation(name: 'main_author'));
+    }
+
+    public function test_snake_case_property_excluded_from_select_fields(): void
+    {
+        $model = inspect(model: SnakeCaseAuthorModel::class);
+        $fields = $model->getSelectFields();
+
+        $fieldNames = [];
+        foreach ($fields as $field) {
+            $fieldNames[] = $field;
+        }
+
+        $this->assertNotContains(
+            needle: 'author_profile',
+            haystack: $fieldNames,
+        );
+        $this->assertNotContains(
+            needle: 'written_books',
+            haystack: $fieldNames,
+        );
+        $this->assertContains(
+            needle: 'name',
+            haystack: $fieldNames,
+        );
+    }
+}
+
+#[Table(name: 'book')]
+final class SnakeCaseBookModel
+{
+    public PrimaryKey $id;
+
+    public SnakeCaseAuthorModel $main_author;
+
+    public string $title;
+}
+
+#[Table(name: 'author')]
+final class SnakeCaseAuthorModel
+{
+    public PrimaryKey $id;
+
+    #[HasOne]
+    public ?SnakeCaseProfileModel $author_profile = null;
+
+    /** @var \Tests\Tempest\Integration\Database\ModelInspector\SnakeCaseBookModel[] */
+    public array $written_books = [];
+
+    public string $name;
+}
+
+#[Table(name: 'profile')]
+final class SnakeCaseProfileModel
+{
+    public PrimaryKey $id;
+
+    public SnakeCaseAuthorModel $author;
+
+    public string $bio;
+}