1 files changed, 22 insertions, 0 deletions
diff --git a/Library/Homebrew/test/os/mac_spec.rb b/Library/Homebrew/test/os/mac_spec.rb
new file mode 100644
index 000000000..641782451
--- /dev/null
+++ b/Library/Homebrew/test/os/mac_spec.rb
@@ -0,0 +1,22 @@
+require "locale"
+require "os/mac"
+
+describe OS::Mac do
+  describe "::languages" do
+    specify "all languages can be parsed by Locale::parse" do
+      subject.languages.each do |language|
+        expect { Locale.parse(language) }.not_to raise_error
+      end
+    end
+  end
+
+  describe "::language" do
+    it "returns the first item from #languages" do
+      expect(subject.language).to eq(subject.languages.first)
+    end
+
+    it "can be parsed by Locale::parse" do
+      expect { Locale.parse(subject.language) }.not_to raise_error
+    end
+  end
+end