Convert FormulaLock test to spec.

Library/Homebrew/test/formula_lock_spec.rb

@@ -0,0 +1,34 @@
+require "formula_lock"
+
+describe FormulaLock do
+  subject { described_class.new("foo") }
+
+  describe "#lock" do
+    it "does not raise an error when already locked" do
+      subject.lock
+
+      expect { subject.lock }.not_to raise_error
+    end
+
+    it "raises an error if a lock already exists" do
+      subject.lock
+
+      expect {
+        described_class.new("foo").lock
+      }.to raise_error(OperationInProgressError)
+    end
+  end
+
+  describe "#unlock" do
+    it "does not raise an error when already unlocked" do
+      expect { subject.unlock }.not_to raise_error
+    end
+
+    it "unlocks a locked Formula" do
+      subject.lock
+      subject.unlock
+
+      expect { described_class.new("foo").lock }.not_to raise_error
+    end
+  end
+end

Library/Homebrew/test/formula_lock_test.rb

@@ -1,23 +0,0 @@
-require "testing_env"
-require "formula_lock"
-
-class FormulaLockTests < Homebrew::TestCase
-  def setup
-    super
-    @lock = FormulaLock.new("foo")
-    @lock.lock
-  end
-
-  def teardown
-    @lock.unlock
-    super
-  end
-
-  def test_locking_file_with_existing_lock_raises_error
-    assert_raises(OperationInProgressError) { FormulaLock.new("foo").lock }
-  end
-
-  def test_locking_existing_lock_suceeds
-    assert_nothing_raised { @lock.lock }
-  end
-end