Convert Descriptions test to spec.

Library/Homebrew/test/descriptions_spec.rb

@@ -0,0 +1,42 @@
+require "descriptions"
+
+describe Descriptions do
+  subject { described_class.new(descriptions_hash) }
+  let(:descriptions_hash) { {} }
+
+  it "can print description for a core Formula" do
+    descriptions_hash["homebrew/core/foo"] = "Core foo"
+    expect { subject.print }.to output("foo: Core foo\n").to_stdout
+  end
+
+  it "can print description for an external Formula" do
+    descriptions_hash["somedev/external/foo"] = "External foo"
+    expect { subject.print }.to output("foo: External foo\n").to_stdout
+  end
+
+  it "can print descriptions for duplicate Formulae" do
+    descriptions_hash["homebrew/core/foo"] = "Core foo"
+    descriptions_hash["somedev/external/foo"] = "External foo"
+
+    expect { subject.print }.to output(
+      <<-EOS.undent
+        homebrew/core/foo: Core foo
+        somedev/external/foo: External foo
+      EOS
+    ).to_stdout
+  end
+
+  it "can print descriptions for duplicate core and external Formulae" do
+    descriptions_hash["homebrew/core/foo"] = "Core foo"
+    descriptions_hash["somedev/external/foo"] = "External foo"
+    descriptions_hash["otherdev/external/foo"] = "Other external foo"
+
+    expect { subject.print }.to output(
+      <<-EOS.undent
+        homebrew/core/foo: Core foo
+        otherdev/external/foo: Other external foo
+        somedev/external/foo: External foo
+      EOS
+    ).to_stdout
+  end
+end

Library/Homebrew/test/descriptions_test.rb

@@ -1,48 +0,0 @@
-require "testing_env"
-require "descriptions"
-
-class DescriptionsTest < Homebrew::TestCase
-  def setup
-    super
-
-    @descriptions_hash = {}
-    @descriptions = Descriptions.new(@descriptions_hash)
-
-    @old_stdout = $stdout
-    $stdout = StringIO.new
-  end
-
-  def teardown
-    $stdout = @old_stdout
-    super
-  end
-
-  def test_single_core_formula
-    @descriptions_hash["homebrew/core/foo"] = "Core foo"
-    @descriptions.print
-    assert_equal "foo: Core foo", $stdout.string.chomp
-  end
-
-  def test_single_external_formula
-    @descriptions_hash["somedev/external/foo"] = "External foo"
-    @descriptions.print
-    assert_equal "foo: External foo", $stdout.string.chomp
-  end
-
-  def test_even_dupes
-    @descriptions_hash["homebrew/core/foo"] = "Core foo"
-    @descriptions_hash["somedev/external/foo"] = "External foo"
-    @descriptions.print
-    assert_equal "homebrew/core/foo: Core foo\nsomedev/external/foo: External foo",
-                 $stdout.string.chomp
-  end
-
-  def test_odd_dupes
-    @descriptions_hash["homebrew/core/foo"] = "Core foo"
-    @descriptions_hash["somedev/external/foo"] = "External foo"
-    @descriptions_hash["otherdev/external/foo"] = "Other external foo"
-    @descriptions.print
-    assert_equal "homebrew/core/foo: Core foo\notherdev/external/foo: Other external foo\nsomedev/external/foo: External foo",
-                 $stdout.string.chomp
-  end
-end