From 15a87414676fa45a339493d3405234ec286473a2 Mon Sep 17 00:00:00 2001
From: Marc Schultz <lunij@users.noreply.github.com>
Date: Sat, 15 Jun 2024 00:28:43 +0200
Subject: [PATCH] Test image scaling

---
 .../SnapshotTestingTests.swift                |  12 +++++++
 Tests/SnapshotTestingTests/TestHelpers.swift  |  31 ++++++++++++++++++
 .../testSnapshotUnscaledByDefault.1.png       | Bin 0 -> 2335 bytes
 3 files changed, 43 insertions(+)
 create mode 100644 Tests/SnapshotTestingTests/__Snapshots__/SnapshotTestingTests/testSnapshotUnscaledByDefault.1.png

diff --git a/Tests/SnapshotTestingTests/SnapshotTestingTests.swift b/Tests/SnapshotTestingTests/SnapshotTestingTests.swift
index 4a5df06c0..4a42d7b9f 100644
--- a/Tests/SnapshotTestingTests/SnapshotTestingTests.swift
+++ b/Tests/SnapshotTestingTests/SnapshotTestingTests.swift
@@ -1133,6 +1133,18 @@ final class SnapshotTestingTests: XCTestCase {
       let firstLine = message?.split(whereSeparator: \.isNewline).first
       XCTAssertEqual(firstLine, "[\(platform)] Snapshot size (123.0, 123.0) is unequal to expected size (100.0, 100.0)")
     }
+
+    func testSnapshotUnscaledByDefault() throws {
+      let size = CGSize(width: 100, height: 100)
+      let view = TestView(size: size)
+      view.backgroundColor = .cyan
+      assertSnapshot(of: view, as: .image)
+      let url = URL(fileURLWithPath: String(#file), isDirectory: false)
+        .deletingLastPathComponent()
+        .appendingPathComponent("__Snapshots__/SnapshotTestingTests/testSnapshotUnscaledByDefault.1.png")
+      let image = try XCTUnwrap(XImage(contentsOf: url))
+      XCTAssertEqual(image.size, size)
+    }
   #endif
 
   #if os(iOS)
diff --git a/Tests/SnapshotTestingTests/TestHelpers.swift b/Tests/SnapshotTestingTests/TestHelpers.swift
index f708c40eb..3ee99ff41 100644
--- a/Tests/SnapshotTestingTests/TestHelpers.swift
+++ b/Tests/SnapshotTestingTests/TestHelpers.swift
@@ -110,3 +110,34 @@ let osVersion = ProcessInfo.processInfo.operatingSystemVersion
     }
   }
 #endif
+
+#if os(iOS) || os(macOS) || os(tvOS)
+  extension XImage {
+    convenience init?(contentsOf url: URL) {
+      #if os(iOS) || os(tvOS)
+      self.init(contentsOfFile: url.path)
+      #elseif os(macOS)
+      self.init(byReferencing: url)
+      #endif
+    }
+  }
+#endif
+
+class TestView: XView {
+  #if os(macOS)
+  var backgroundColor: NSColor? {
+    get {
+      guard let cgColor = layer?.backgroundColor else { return nil }
+      return NSColor(cgColor: cgColor)
+    }
+    set {
+      wantsLayer = true
+      layer?.backgroundColor = newValue?.cgColor
+    }
+  }
+  #endif
+
+  convenience init(size: CGSize) {
+    self.init(frame: .init(origin: .zero, size: size))
+  }
+}
diff --git a/Tests/SnapshotTestingTests/__Snapshots__/SnapshotTestingTests/testSnapshotUnscaledByDefault.1.png b/Tests/SnapshotTestingTests/__Snapshots__/SnapshotTestingTests/testSnapshotUnscaledByDefault.1.png
new file mode 100644
index 0000000000000000000000000000000000000000..af261e5fb665bcebdab1506bfbe20eda42412567
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