Convert FormulaPin test to spec.

1 files changed, 41 insertions, 0 deletions

diff --git a/Library/Homebrew/test/formula_pin_spec.rb b/Library/Homebrew/test/formula_pin_spec.rb
new file mode 100644
index 000000000..909bfbc2b
--- /dev/null
+++ b/Library/Homebrew/test/formula_pin_spec.rb
@@ -0,0 +1,41 @@
+require "formula_pin"
+
+describe FormulaPin do
+  subject { described_class.new(formula) }
+  let(:name) { "double" }
+  let(:formula) { double(Formula, name: name, rack: HOMEBREW_CELLAR/name) }
+
+  before(:each) do
+    formula.rack.mkpath
+
+    allow(formula).to receive(:installed_prefixes) do
+      formula.rack.directory? ? formula.rack.subdirs : []
+    end
+
+    allow(formula).to receive(:installed_kegs) do
+      formula.installed_prefixes.map { |prefix| Keg.new(prefix) }
+    end
+  end
+
+  it "is not pinnable by default" do
+    expect(subject).not_to be_pinnable
+  end
+
+  it "is pinnable if the Keg exists" do
+    (formula.rack/"0.1").mkpath
+    expect(subject).to be_pinnable
+  end
+
+  specify "#pin and #unpin" do
+    (formula.rack/"0.1").mkpath
+
+    subject.pin
+    expect(subject).to be_pinned
+    expect(HOMEBREW_PINNED_KEGS/name).to be_a_directory
+    expect(HOMEBREW_PINNED_KEGS.children.count).to eq(1)
+
+    subject.unpin
+    expect(subject).not_to be_pinned
+    expect(HOMEBREW_PINNED_KEGS).not_to be_a_directory
+  end
+end