pngpaste: add test

Closes #36934.

Signed-off-by: Xu Cheng <xucheng@me.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/Library/Formula/pngpaste.rb b/Library/Formula/pngpaste.rb
index ab9b55af7..5ac01b6d3 100644
--- a/Library/Formula/pngpaste.rb
+++ b/Library/Formula/pngpaste.rb
@@ -1,5 +1,3 @@
-require "formula"
-
 class Pngpaste < Formula
   homepage "https://github.com/jcsalterego/pngpaste"
   url "https://github.com/jcsalterego/pngpaste/archive/0.2.1.tar.gz"
@@ -9,4 +7,11 @@ class Pngpaste < Formula
     system "make", "all"
     bin.install "pngpaste"
   end
+
+  test do
+    png = test_fixtures("test.png")
+    system "osascript", "-e", "set the clipboard to POSIX file (\"#{png}\")"
+    system bin/"pngpaste", "test.png"
+    assert File.exist? "test.png"
+  end
 end