Add tests for Cask::Config.

Library/Homebrew/test/cask/config_spec.rb

@@ -0,0 +1,51 @@
+describe Cask::Config, :cask do
+  subject(:config) { described_class.new }
+
+  describe "#default" do
+    it "returns the default directories" do
+      expect(config.default[:appdir]).to eq(Pathname(TEST_TMPDIR).join("cask-appdir"))
+    end
+  end
+
+  describe "#appdir" do
+    it "returns the default value if no HOMEBREW_CASK_OPTS is unset" do
+      expect(config.appdir).to eq(Pathname(TEST_TMPDIR).join("cask-appdir"))
+    end
+
+    specify "environment overwrites default" do
+      ENV["HOMEBREW_CASK_OPTS"] = "--appdir=/path/to/apps"
+
+      expect(config.appdir).to eq(Pathname("/path/to/apps"))
+    end
+
+    specify "specific overwrites default" do
+      config = described_class.new(explicit: { appdir: "/explicit/path/to/apps" })
+
+      expect(config.appdir).to eq(Pathname("/explicit/path/to/apps"))
+    end
+
+    specify "explicit overwrites environment" do
+      ENV["HOMEBREW_CASK_OPTS"] = "--appdir=/path/to/apps"
+
+      config = described_class.new(explicit: { appdir: "/explicit/path/to/apps" })
+
+      expect(config.appdir).to eq(Pathname("/explicit/path/to/apps"))
+    end
+  end
+
+  describe "#env" do
+    it "returns directories specified with the HOMEBREW_CASK_OPTS variable" do
+      ENV["HOMEBREW_CASK_OPTS"] = "--appdir=/path/to/apps"
+
+      expect(config.env).to eq(appdir: Pathname("/path/to/apps"))
+    end
+  end
+
+  describe "#explicit" do
+    let(:config) { described_class.new(explicit: { appdir: "/explicit/path/to/apps" }) }
+
+    it "returns directories explicitly given as arguments" do
+      expect(config.explicit[:appdir]).to eq(Pathname("/explicit/path/to/apps"))
+    end
+  end
+end