Add empty queries feature

Author: Kewei Yan

.gitignore

@@ -3,4 +3,5 @@ composer.lock
 vendor
 coverage
 .idea
-nbproject
+nbproject
+.phpunit.result.cache

src/QueryDetector.php

@@ -213,4 +213,9 @@ public function output($request, $response)
 
         return $response;
     }
+
+    public function emptyQueries()
+    {
+        $this->queries = Collection::make();
+    }
 }

tests/QueryDetectorTest.php

@@ -288,4 +288,27 @@ public function it_uses_the_trace_line_to_detect_queries()
         $this->assertSame(Author::class, $queries[0]['model']);
         $this->assertSame('profile', $queries[0]['relation']);
     }
+
+    /** @test */
+    public function it_empty_queries()
+    {
+        Route::get('/', function (){
+            $authors = Author::all();
+
+            foreach ($authors as $author) {
+                $author->profile;
+            }
+        });
+
+        $this->get('/');
+
+        $queryDetector = app(QueryDetector::class);
+
+        $queries = $queryDetector->getDetectedQueries();
+        $this->assertCount(1, $queries);
+
+        $queryDetector->emptyQueries();
+        $queries = $queryDetector->getDetectedQueries();
+        $this->assertCount(0, $queries);
+    }
 }