Add tests for resource helpers

tests/Database/DatabaseEloquentResourceCollectionTest.php

@@ -0,0 +1,72 @@
+<?php
+
+namespace Illuminate\Tests\Database;
+
+use Illuminate\Database\Eloquent\Collection;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Http\Resources\Json\JsonResource;
+use PHPUnit\Framework\TestCase;
+
+class DatabaseEloquentResourceCollectionTest extends TestCase
+{
+    public function testItGuessesTheResourceName()
+    {
+        $collection = new TestCollection([
+            new TestModel(),
+        ]);
+        $this->assertEquals('App\Http\Resources\TestModelResource', $collection->getGuessedResourceName(new TestModel()));
+    }
+
+    public function testItCanTransformToExplicitResource()
+    {
+        $collection = new Collection([
+            new TestModel(),
+        ]);
+
+        $resource = $collection->toResourceCollection(TestResource::class);
+
+        $this->assertInstanceOf(JsonResource::class, $resource);
+    }
+
+    public function testItThrowsExceptionWhenResourceCannotBeFound()
+    {
+        $this->expectException(\Exception::class);
+        $this->expectExceptionMessage('Failed to find resource class for model [Illuminate\Tests\Database\TestModel].');
+
+        $collection = new Collection([
+            new TestModel(),
+        ]);
+        $collection->toResourceCollection();
+    }
+
+    public function testItCanGuessResourceWhenNotProvided()
+    {
+        $collection = new Collection([
+            new TestModel(),
+        ]);
+
+        class_alias(TestResource::class, 'App\Http\Resources\TestModelResource');
+
+        $resource = $collection->toResourceCollection();
+
+        $this->assertInstanceOf(JsonResource::class, $resource);
+    }
+}
+
+class TestModel extends Model
+{
+    //
+}
+
+class TestResource extends JsonResource
+{
+    //
+}
+
+class TestCollection extends Collection
+{
+    public function getGuessedResourceName(object $model): string
+    {
+        return $this->guessResourceClassName($model);
+    }
+}

tests/Database/DatabaseEloquentResourceModelTest.php

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+<?php
+
+namespace Illuminate\Tests\Database;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Http\Resources\Json\JsonResource;
+use PHPUnit\Framework\TestCase;
+
+class DatabaseEloquentResourceModelTest extends TestCase
+{
+    public function testItCanTransformToExplicitResource()
+    {
+        $model = new TestResourceModel();
+        $resource = $model->toResource(TestJsonResource::class);
+
+        $this->assertInstanceOf(TestJsonResource::class, $resource);
+        $this->assertSame($model, $resource->resource);
+    }
+
+    public function testItThrowsExceptionWhenResourceCannotBeFound()
+    {
+        $this->expectException(\Exception::class);
+        $this->expectExceptionMessage('Failed to find resource class for model [Illuminate\Tests\Database\TestResourceModel].');
+
+        $model = new TestResourceModel();
+        $model->toResource();
+    }
+
+    public function testItCanGuessResourceWhenNotProvided()
+    {
+        $model = new TestResourceModelWithGuessableResource();
+
+        class_alias(TestJsonResource::class, 'App\Http\Resources\TestResourceModelWithGuessableResourceResource');
+
+        $resource = $model->toResource();
+
+        $this->assertInstanceOf(TestJsonResource::class, $resource);
+        $this->assertSame($model, $resource->resource);
+    }
+
+    public function testItCanGuessResourceName()
+    {
+        $model = new TestResourceModel();
+        $this->assertEquals('App\Http\Resources\TestResourceModelResource', $model->getGuessedResourceName());
+    }
+
+}
+
+class TestResourceModel extends Model
+{
+    public function getGuessedResourceName(): string
+    {
+        return $this->guessResourceName();
+    }
+}
+
+class TestResourceModelWithGuessableResource extends Model
+{
+}
+
+class TestJsonResource extends JsonResource
+{
+}

tests/Pagination/PaginatorResourceTest.php

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+<?php
+
+namespace Illuminate\Tests\Pagination;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Http\Resources\Json\JsonResource;
+use Illuminate\Pagination\LengthAwarePaginator;
+use PHPUnit\Framework\TestCase;
+
+class PaginatorResourceTest extends TestCase
+{
+    public function testItGuessesTheResourceName()
+    {
+        $paginator = new TestPaginator([
+            new TestModel(),
+        ], 1, 1);
+
+        $this->assertEquals('App\Http\Resources\TestModelResource', $paginator->getGuessedResourceName(new TestModel()));
+    }
+
+    public function testItCanTransformToExplicitResource()
+    {
+        $paginator = new TestPaginator([
+            new TestModel(),
+        ], 1, 1);
+
+        $resource = $paginator->toResourceCollection(TestResource::class);
+
+        $this->assertInstanceOf(JsonResource::class, $resource);
+    }
+
+    public function testItThrowsExceptionWhenResourceCannotBeFound()
+    {
+        $this->expectException(\Exception::class);
+        $this->expectExceptionMessage('Failed to find resource class for model [Illuminate\Tests\Pagination\TestModel].');
+
+        $paginator = new TestPaginator([
+            new TestModel(),
+        ], 1, 1);
+
+        $paginator->toResourceCollection();
+    }
+
+    public function testItCanGuessResourceWhenNotProvided()
+    {
+        $paginator = new TestPaginator([
+            new TestModel(),
+        ], 1, 1);
+
+        class_alias(TestResource::class, 'App\Http\Resources\TestModelResource');
+
+        $resource = $paginator->toResourceCollection();
+
+        $this->assertInstanceOf(JsonResource::class, $resource);
+    }
+}
+
+class TestModel extends Model
+{
+    //
+}
+
+class TestResource extends JsonResource
+{
+    //
+}
+
+class TestPaginator extends LengthAwarePaginator
+{
+    public function getGuessedResourceName(object $model): string
+    {
+        return $this->guessResourceClassName($model);
+    }
+}