Convert CxxStdlib test to spec.

Library/Homebrew/test/cxxstdlib_spec.rb

+require "formula"
+require "cxxstdlib"
+
+describe CxxStdlib do
+  let(:clang) { CxxStdlib.create(:libstdcxx, :clang) }
+  let(:gcc) { CxxStdlib.create(:libstdcxx, :gcc) }
+  let(:gcc40) { CxxStdlib.create(:libstdcxx, :gcc_4_0) }
+  let(:gcc42) { CxxStdlib.create(:libstdcxx, :gcc_4_2) }
+  let(:gcc48) { CxxStdlib.create(:libstdcxx, "gcc-4.8") }
+  let(:gcc49) { CxxStdlib.create(:libstdcxx, "gcc-4.9") }
+  let(:lcxx) { CxxStdlib.create(:libcxx, :clang) }
+  let(:purec) { CxxStdlib.create(nil, :clang) }
+
+  describe "#compatible_with?" do
+    specify "Apple libstdcxx intercompatibility" do
+      expect(clang).to be_compatible_with(gcc)
+      expect(clang).to be_compatible_with(gcc42)
+    end
+
+    specify "compatibility with itself" do
+      expect(gcc).to be_compatible_with(gcc)
+      expect(gcc48).to be_compatible_with(gcc48)
+      expect(clang).to be_compatible_with(clang)
+    end
+
+    specify "Apple/GNU libstdcxx incompatibility" do
+      expect(clang).not_to be_compatible_with(gcc48)
+      expect(gcc48).not_to be_compatible_with(clang)
+    end
+
+    specify "GNU cross-version incompatibility" do
+      expect(gcc48).not_to be_compatible_with(gcc49)
+      expect(gcc49).not_to be_compatible_with(gcc48)
+    end
+
+    specify "libstdcxx and libcxx incompatibility" do
+      expect(clang).not_to be_compatible_with(lcxx)
+      expect(lcxx).not_to be_compatible_with(clang)
+    end
+
+    specify "compatibility for non-cxx software" do
+      expect(purec).to be_compatible_with(clang)
+      expect(clang).to be_compatible_with(purec)
+      expect(purec).to be_compatible_with(purec)
+      expect(purec).to be_compatible_with(gcc48)
+      expect(gcc48).to be_compatible_with(purec)
+    end
+  end
+
+  describe "#apple_compiler?" do
+    it "returns true for Apple compilers" do
+      expect(clang).to be_an_apple_compiler
+      expect(gcc).to be_an_apple_compiler
+      expect(gcc42).to be_an_apple_compiler
+    end
+
+    it "returns false for non-Apple compilers" do
+      expect(gcc48).not_to be_an_apple_compiler
+    end
+  end
+
+  describe "#type_string" do
+    specify "formatting" do
+      expect(clang.type_string).to eq("libstdc++")
+      expect(lcxx.type_string).to eq("libc++")
+    end
+  end
+end

Library/Homebrew/test/stdlib_test.rb

-require "testing_env"
-require "formula"
-require "cxxstdlib"
-
-class CxxStdlibTests < Homebrew::TestCase
-  def setup
-    super
-    @clang = CxxStdlib.create(:libstdcxx, :clang)
-    @gcc   = CxxStdlib.create(:libstdcxx, :gcc)
-    @gcc40 = CxxStdlib.create(:libstdcxx, :gcc_4_0)
-    @gcc42 = CxxStdlib.create(:libstdcxx, :gcc_4_2)
-    @gcc48 = CxxStdlib.create(:libstdcxx, "gcc-4.8")
-    @gcc49 = CxxStdlib.create(:libstdcxx, "gcc-4.9")
-    @lcxx  = CxxStdlib.create(:libcxx, :clang)
-    @purec = CxxStdlib.create(nil, :clang)
-  end
-
-  def test_apple_libstdcxx_intercompatibility
-    assert @clang.compatible_with?(@gcc)
-    assert @clang.compatible_with?(@gcc42)
-  end
-
-  def test_compatibility_same_compilers_and_type
-    assert @gcc.compatible_with?(@gcc)
-    assert @gcc48.compatible_with?(@gcc48)
-    assert @clang.compatible_with?(@clang)
-  end
-
-  def test_apple_gnu_libstdcxx_incompatibility
-    assert !@clang.compatible_with?(@gcc48)
-    assert !@gcc48.compatible_with?(@clang)
-  end
-
-  def test_gnu_cross_version_incompatibility
-    assert !@gcc48.compatible_with?(@gcc49)
-    assert !@gcc49.compatible_with?(@gcc48)
-  end
-
-  def test_libstdcxx_libcxx_incompatibility
-    assert !@clang.compatible_with?(@lcxx)
-    assert !@lcxx.compatible_with?(@clang)
-  end
-
-  def test_apple_compiler_reporting
-    assert_predicate @clang, :apple_compiler?
-    assert_predicate @gcc, :apple_compiler?
-    assert_predicate @gcc42, :apple_compiler?
-    refute_predicate @gcc48, :apple_compiler?
-  end
-
-  def test_type_string_formatting
-    assert_equal "libstdc++", @clang.type_string
-    assert_equal "libc++", @lcxx.type_string
-  end
-
-  def test_compatibility_for_non_cxx_software
-    assert @purec.compatible_with?(@clang)
-    assert @clang.compatible_with?(@purec)
-    assert @purec.compatible_with?(@purec)
-    assert @purec.compatible_with?(@gcc48)
-    assert @gcc48.compatible_with?(@purec)
-  end
-end