From 47baf20ac794246790d441b9dc69b1c55d87d2a5 Mon Sep 17 00:00:00 2001
From: Lukas Klingsbo <me@lukas.fyi>
Date: Thu, 5 Oct 2023 12:50:42 +0200
Subject: [PATCH] Add golden tests

---
 doc/flame/camera_component.md                 |   1 +
 .../camera_component_prescale_test.png        | Bin 0 -> 604 bytes
 .../camera_component_prescale_zoom_test.png   | Bin 0 -> 614 bytes
 .../test/camera/camera_component_test.dart    |  83 ++++++++++++++++++
 4 files changed, 84 insertions(+)
 create mode 100644 packages/flame/test/_goldens/camera_component_prescale_test.png
 create mode 100644 packages/flame/test/_goldens/camera_component_prescale_zoom_test.png

diff --git a/doc/flame/camera_component.md b/doc/flame/camera_component.md
index d11c261bbca..bbb88a04fd4 100644
--- a/doc/flame/camera_component.md
+++ b/doc/flame/camera_component.md
@@ -188,6 +188,7 @@ you want to have a static `ParallaxComponent` beneath a world that you can move
 around it.
 
 Example:
+
 ```dart
 camera.backdrop.add(MyStaticBackground());
 ```
diff --git a/packages/flame/test/_goldens/camera_component_prescale_test.png b/packages/flame/test/_goldens/camera_component_prescale_test.png
new file mode 100644
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GIT binary patch
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diff --git a/packages/flame/test/_goldens/camera_component_prescale_zoom_test.png b/packages/flame/test/_goldens/camera_component_prescale_zoom_test.png
new file mode 100644
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diff --git a/packages/flame/test/camera/camera_component_test.dart b/packages/flame/test/camera/camera_component_test.dart
index ac14b48dbcf..9d63508358f 100644
--- a/packages/flame/test/camera/camera_component_test.dart
+++ b/packages/flame/test/camera/camera_component_test.dart
@@ -345,6 +345,89 @@ void main() {
     );
   });
 
+  testGolden(
+    'Correct scale of rendering',
+    (game) async {
+      final world = World();
+      final resolution = Vector2(40, 60);
+      final camera = CameraComponent.withFixedResolution(
+        world: world,
+        width: resolution.x,
+        height: resolution.y,
+      );
+      game.addAll([world, camera]);
+      camera.viewfinder.position = Vector2.all(4);
+      camera.backdrop.add(
+        CrossHair(
+          size: Vector2.all(28),
+          position: resolution / 2 + Vector2.all(4),
+          color: Colors.teal,
+        ),
+      );
+      camera.viewfinder.add(
+        CrossHair(
+          size: Vector2.all(20),
+          position: resolution / 2 + Vector2(-6, 0),
+          color: Colors.white,
+        ),
+      );
+      world.add(
+        CrossHair(size: Vector2.all(14), color: Colors.green),
+      );
+      camera.viewport.add(
+        CrossHair(
+          size: Vector2.all(8),
+          position: resolution / 2 + Vector2(4, -4),
+          color: Colors.red,
+        ),
+      );
+    },
+    goldenFile: '../_goldens/camera_component_prescale_test.png',
+    size: Vector2(50, 50),
+  );
+
+  testGolden(
+    'Correct scale of rendering after zoom',
+    (game) async {
+      final world = World();
+      final resolution = Vector2(40, 60);
+      final camera = CameraComponent.withFixedResolution(
+        world: world,
+        width: resolution.x,
+        height: resolution.y,
+      );
+      game.addAll([world, camera]);
+      camera.viewfinder.position = Vector2.all(4);
+      camera.viewfinder.zoom = 1.5;
+      camera.backdrop.add(
+        CrossHair(
+          size: Vector2.all(28),
+          position: resolution / 2 + Vector2.all(4),
+          color: Colors.teal,
+        ),
+      );
+      camera.viewfinder.add(
+        CrossHair(
+          size: Vector2.all(20),
+          position: resolution / 2 + Vector2(-6, 0),
+          color: Colors.white,
+        ),
+      );
+      world.add(
+        CrossHair(size: Vector2.all(14), color: Colors.green),
+      );
+      camera.viewport.add(
+        CrossHair(
+          size: Vector2.all(8),
+          position: resolution / 2 + Vector2(4, -4),
+          color: Colors.red,
+        ),
+      );
+    },
+    goldenFile: '../_goldens/camera_component_prescale_zoom_test.png',
+    size: Vector2(50, 50),
+  );
+
   group('CameraComponent.canSee', () {
     testWithFlameGame('null world', (game) async {
       final player = PositionComponent();