3 files changed, 289 insertions, 153 deletions
diff --git a/Library/Homebrew/.rubocop.yml b/Library/Homebrew/.rubocop.yml
index a85f0dcab..938bf21b7 100644
--- a/Library/Homebrew/.rubocop.yml
+++ b/Library/Homebrew/.rubocop.yml
@@ -12,7 +12,7 @@ AllCops:
 Style/BlockDelimiters:
   Exclude:
     - '**/cask/spec/**/*'
-    - '**/cask/test/**/*'
+    - '**/*_spec.rb'
 
 # so many of these in formulae but none in here
 Lint/AmbiguousRegexpLiteral:
diff --git a/Library/Homebrew/test/requirement_spec.rb b/Library/Homebrew/test/requirement_spec.rb
new file mode 100644
index 000000000..110a7ac4f
--- /dev/null
+++ b/Library/Homebrew/test/requirement_spec.rb
@@ -0,0 +1,288 @@
+require "extend/ENV"
+require "requirement"
+
+RSpec::Matchers.alias_matcher :have_a_default_formula, :be_a_default_formula
+RSpec::Matchers.alias_matcher :be_a_build_requirement, :be_a_build
+
+describe Requirement do
+  subject { klass.new }
+
+  let(:klass) { Class.new(described_class) }
+
+  describe "#tags" do
+    subject { described_class.new(tags) }
+
+    context "single tag" do
+      let(:tags) { ["bar"] }
+
+      its(:tags) { are_expected.to eq(tags) }
+    end
+
+    context "multiple tags" do
+      let(:tags) { ["bar", "baz"] }
+
+      its(:tags) { are_expected.to eq(tags) }
+    end
+
+    context "symbol tags" do
+      let(:tags) { [:build] }
+
+      its(:tags) { are_expected.to eq(tags) }
+    end
+
+    context "symbol and string tags" do
+      let(:tags) { [:build, "bar"] }
+
+      its(:tags) { are_expected.to eq(tags) }
+    end
+  end
+
+  describe "#fatal?" do
+    context "#fatal true is specified" do
+      let(:klass) do
+        Class.new(described_class) do
+          fatal true
+        end
+      end
+
+      it { is_expected.to be_fatal }
+    end
+
+    context "#fatal is ommitted" do
+      it { is_expected.not_to be_fatal }
+    end
+  end
+
+  describe "#satisfied?" do
+    context "#satisfy with block and build_env returns true" do
+      let(:klass) do
+        Class.new(described_class) do
+          satisfy(build_env: false) do
+            true
+          end
+        end
+      end
+
+      it { is_expected.to be_satisfied }
+    end
+
+    context "#satisfy with block and build_env returns false" do
+      let(:klass) do
+        Class.new(described_class) do
+          satisfy(build_env: false) do
+            false
+          end
+        end
+      end
+
+      it { is_expected.not_to be_satisfied }
+    end
+
+    context "#satisfy returns true" do
+      let(:klass) do
+        Class.new(described_class) do
+          satisfy true
+        end
+      end
+
+      it { is_expected.to be_satisfied }
+    end
+
+    context "#satisfy returns false" do
+      let(:klass) do
+        Class.new(described_class) do
+          satisfy false
+        end
+      end
+
+      it { is_expected.not_to be_satisfied }
+    end
+
+    context "#satisfy with block returning true and without :build_env" do
+      let(:klass) do
+        Class.new(described_class) do
+          satisfy do
+            true
+          end
+        end
+      end
+
+      it "sets up build environment" do
+        expect(ENV).to receive(:with_build_environment).and_call_original
+        subject.satisfied?
+      end
+    end
+
+    context "#satisfy with block returning true and :build_env set to false" do
+      let(:klass) do
+        Class.new(described_class) do
+          satisfy(build_env: false) do
+            true
+          end
+        end
+      end
+
+      it "skips setting up build environment" do
+        expect(ENV).not_to receive(:with_build_environment)
+        subject.satisfied?
+      end
+    end
+
+    context "#satisfy with block returning path and without :build_env" do
+      let(:klass) do
+        Class.new(described_class) do
+          satisfy do
+            Pathname.new("/foo/bar/baz")
+          end
+        end
+      end
+
+      it "infers path from #satisfy result" do
+        expect(ENV).to receive(:append_path).with("PATH", Pathname.new("/foo/bar"))
+        subject.satisfied?
+        subject.modify_build_environment
+      end
+    end
+  end
+
+  describe "#build?" do
+    context "#build true is specified" do
+      let(:klass) do
+        Class.new(described_class) do
+          build true
+        end
+      end
+
+      it { is_expected.to be_a_build_requirement }
+    end
+
+    context "#build ommitted" do
+      it { is_expected.not_to be_a_build_requirement }
+    end
+  end
+
+  describe "#name and #option_names" do
+    let(:const) { :FooRequirement }
+    let(:klass) { self.class.const_get(const) }
+
+    before(:each) do
+      self.class.const_set(const, Class.new(described_class))
+    end
+
+    after(:each) do
+      self.class.send(:remove_const, const)
+    end
+
+    its(:name) { is_expected.to eq("foo") }
+    its(:option_names) { are_expected.to eq(["foo"]) }
+  end
+
+  describe "#default_formula?" do
+    context "#default_formula specified" do
+      let(:klass) do
+        Class.new(described_class) do
+          default_formula "foo"
+        end
+      end
+
+      it { is_expected.to have_a_default_formula }
+    end
+
+    context "#default_formula ommitted" do
+      it { is_expected.not_to have_a_default_formula }
+    end
+  end
+
+  describe "#to_dependency" do
+    let(:klass) do
+      Class.new(described_class) do
+        default_formula "foo"
+      end
+    end
+
+    it "returns a Dependency for its default Formula" do
+      expect(subject.to_dependency).to eq(Dependency.new("foo"))
+    end
+
+    context "#modify_build_environment" do
+      context "with error" do
+        let(:klass) do
+          Class.new(described_class) do
+            class ModifyBuildEnvironmentError < StandardError; end
+
+            default_formula "foo"
+
+            satisfy do
+              true
+            end
+
+            env do
+              raise ModifyBuildEnvironmentError
+            end
+          end
+        end
+
+        it "raises an error" do
+          expect {
+            subject.to_dependency.modify_build_environment
+          }.to raise_error(klass.const_get(:ModifyBuildEnvironmentError))
+        end
+      end
+    end
+  end
+
+  describe "#modify_build_environment" do
+    context "without env proc" do
+      let(:klass) { Class.new(described_class) }
+
+      it "returns nil" do
+        expect(subject.modify_build_environment).to be nil
+      end
+    end
+  end
+
+  describe "#eql? and #==" do
+    subject { described_class.new }
+
+    it "returns true if the names and tags are equal" do
+      other = described_class.new
+
+      expect(subject).to eql(other)
+      expect(subject).to eq(other)
+    end
+
+    it "returns false if names differ" do
+      other = described_class.new
+      allow(other).to receive(:name).and_return("foo")
+      expect(subject).not_to eql(other)
+      expect(subject).not_to eq(other)
+    end
+
+    it "returns false if tags differ" do
+      other = described_class.new([:optional])
+
+      expect(subject).not_to eql(other)
+      expect(subject).not_to eq(other)
+    end
+  end
+
+  describe "#hash" do
+    subject { described_class.new }
+
+    it "is equal if names and tags are equal" do
+      other = described_class.new
+      expect(subject.hash).to eq(other.hash)
+    end
+
+    it "differs if names differ" do
+      other = described_class.new
+      allow(other).to receive(:name).and_return("foo")
+      expect(subject.hash).not_to eq(other.hash)
+    end
+
+    it "differs if tags differ" do
+      other = described_class.new([:optional])
+      expect(subject.hash).not_to eq(other.hash)
+    end
+  end
+end
diff --git a/Library/Homebrew/test/requirement_test.rb b/Library/Homebrew/test/requirement_test.rb
deleted file mode 100644
index 580d42bfa..000000000
--- a/Library/Homebrew/test/requirement_test.rb
+++ /dev/null
@@ -1,152 +0,0 @@
-require "testing_env"
-require "requirement"
-
-class RequirementTests < Homebrew::TestCase
-  class TestRequirement < Requirement; end
-
-  def test_accepts_single_tag
-    dep = Requirement.new(%w[bar])
-    assert_equal %w[bar], dep.tags
-  end
-
-  def test_accepts_multiple_tags
-    dep = Requirement.new(%w[bar baz])
-    assert_equal %w[bar baz].sort, dep.tags.sort
-  end
-
-  def test_option_names
-    dep = TestRequirement.new
-    assert_equal %w[test], dep.option_names
-  end
-
-  def test_preserves_symbol_tags
-    dep = Requirement.new([:build])
-    assert_equal [:build], dep.tags
-  end
-
-  def test_accepts_symbol_and_string_tags
-    dep = Requirement.new([:build, "bar"])
-    assert_equal [:build, "bar"], dep.tags
-  end
-
-  def test_dsl_fatal
-    req = Class.new(Requirement) { fatal true }.new
-    assert_predicate req, :fatal?
-  end
-
-  def test_satisfy_true
-    req = Class.new(Requirement) do
-      satisfy(build_env: false) { true }
-    end.new
-    assert_predicate req, :satisfied?
-  end
-
-  def test_satisfy_false
-    req = Class.new(Requirement) do
-      satisfy(build_env: false) { false }
-    end.new
-    refute_predicate req, :satisfied?
-  end
-
-  def test_satisfy_with_boolean
-    req = Class.new(Requirement) do
-      satisfy true
-    end.new
-    assert_predicate req, :satisfied?
-  end
-
-  def test_satisfy_sets_up_build_env_by_default
-    req = Class.new(Requirement) do
-      satisfy { true }
-    end.new
-
-    ENV.expects(:with_build_environment).yields.returns(true)
-
-    assert_predicate req, :satisfied?
-  end
-
-  def test_satisfy_build_env_can_be_disabled
-    req = Class.new(Requirement) do
-      satisfy(build_env: false) { true }
-    end.new
-
-    ENV.expects(:with_build_environment).never
-
-    assert_predicate req, :satisfied?
-  end
-
-  def test_infers_path_from_satisfy_result
-    which_path = Pathname.new("/foo/bar/baz")
-    req = Class.new(Requirement) do
-      satisfy { which_path }
-    end.new
-
-    ENV.expects(:with_build_environment).yields.returns(which_path)
-    ENV.expects(:append_path).with("PATH", which_path.parent)
-
-    req.satisfied?
-    req.modify_build_environment
-  end
-
-  def test_dsl_build
-    req = Class.new(Requirement) { build true }.new
-    assert_predicate req, :build?
-  end
-
-  def test_infer_name_from_class
-    const = :FooRequirement
-    klass = self.class
-
-    klass.const_set(const, Class.new(Requirement))
-
-    begin
-      assert_equal "foo", klass.const_get(const).new.name
-    ensure
-      klass.send(:remove_const, const)
-    end
-  end
-
-  def test_dsl_default_formula
-    req = Class.new(Requirement) { default_formula "foo" }.new
-    assert_predicate req, :default_formula?
-  end
-
-  def test_to_dependency
-    req = Class.new(Requirement) { default_formula "foo" }.new
-    assert_equal Dependency.new("foo"), req.to_dependency
-  end
-
-  def test_to_dependency_calls_requirement_modify_build_environment
-    error = Class.new(StandardError)
-
-    req = Class.new(Requirement) do
-      default_formula "foo"
-      satisfy { true }
-      env { raise error }
-    end.new
-
-    assert_raises(error) do
-      req.to_dependency.modify_build_environment
-    end
-  end
-
-  def test_modify_build_environment_without_env_proc
-    assert_nil Class.new(Requirement).new.modify_build_environment
-  end
-
-  def test_eql
-    a = Requirement.new
-    b = Requirement.new
-    assert_equal a, b
-    assert_eql a, b
-    assert_equal a.hash, b.hash
-  end
-
-  def test_not_eql
-    a = Requirement.new([:optional])
-    b = Requirement.new
-    refute_equal a, b
-    refute_eql a, b
-    refute_equal a.hash, b.hash
-  end
-end