Convert StringInreplaceExtension test to spec.

2 files changed, 251 insertions, 119 deletions

diff --git a/Library/Homebrew/test/inreplace_spec.rb b/Library/Homebrew/test/inreplace_spec.rb
new file mode 100644
index 000000000..5be44f50d
--- /dev/null
+++ b/Library/Homebrew/test/inreplace_spec.rb
@@ -0,0 +1,251 @@
+require "extend/string"
+require "tempfile"
+require "utils/inreplace"
+
+describe StringInreplaceExtension do
+  subject { string.extend(described_class) }
+
+  describe "#change_make_var!" do
+    context "flag" do
+      context "with spaces" do
+        let(:string) do
+          <<-EOS.undent
+            OTHER=def
+            FLAG = abc
+            FLAG2=abc
+          EOS
+        end
+
+        it "is successfully replaced" do
+          subject.change_make_var! "FLAG", "def"
+          expect(subject).to eq <<-EOS.undent
+            OTHER=def
+            FLAG=def
+            FLAG2=abc
+          EOS
+        end
+
+        it "is successfully appended" do
+          subject.change_make_var! "FLAG", "\\1 def"
+          expect(subject).to eq <<-EOS.undent
+            OTHER=def
+            FLAG=abc def
+            FLAG2=abc
+          EOS
+        end
+      end
+
+      context "with tabs" do
+        let(:string) do
+          <<-EOS.undent
+            CFLAGS\t=\t-Wall -O2
+            LDFLAGS\t=\t-lcrypto -lssl
+          EOS
+        end
+
+        it "is successfully replaced" do
+          subject.change_make_var! "CFLAGS", "-O3"
+          expect(subject).to eq <<-EOS.undent
+            CFLAGS=-O3
+            LDFLAGS\t=\t-lcrypto -lssl
+          EOS
+        end
+      end
+    end
+
+    context "empty flag between other flags" do
+      let(:string) do
+        <<-EOS.undent
+          OTHER=def
+          FLAG =
+          FLAG2=abc
+        EOS
+      end
+
+      it "is successfully replaced" do
+        subject.change_make_var! "FLAG", "def"
+        expect(subject).to eq <<-EOS.undent
+          OTHER=def
+          FLAG=def
+          FLAG2=abc
+        EOS
+      end
+    end
+
+    context "empty flag" do
+      let(:string) do
+        <<-EOS.undent
+          FLAG =
+          mv file_a file_b
+        EOS
+      end
+
+      it "is successfully replaced" do
+        subject.change_make_var! "FLAG", "def"
+        expect(subject).to eq <<-EOS.undent
+          FLAG=def
+          mv file_a file_b
+        EOS
+      end
+    end
+
+    context "shell-style variable" do
+      let(:string) do
+        <<-EOS.undent
+          OTHER=def
+          FLAG=abc
+          FLAG2=abc
+        EOS
+      end
+
+      it "is successfully replaced" do
+        subject.change_make_var! "FLAG", "def"
+        expect(subject).to eq <<-EOS.undent
+          OTHER=def
+          FLAG=def
+          FLAG2=abc
+        EOS
+      end
+    end
+  end
+
+  describe "#remove_make_var!" do
+    context "flag" do
+      context "with spaces" do
+        let(:string) do
+          <<-EOS.undent
+            OTHER=def
+            FLAG = abc
+            FLAG2 = def
+          EOS
+        end
+
+        it "is successfully removed" do
+          subject.remove_make_var! "FLAG"
+          expect(subject).to eq <<-EOS.undent
+            OTHER=def
+            FLAG2 = def
+          EOS
+        end
+      end
+
+      context "with tabs" do
+        let(:string) do
+          <<-EOS.undent
+            CFLAGS\t=\t-Wall -O2
+            LDFLAGS\t=\t-lcrypto -lssl
+          EOS
+        end
+
+        it "is successfully removed" do
+          subject.remove_make_var! "LDFLAGS"
+          expect(subject).to eq <<-EOS.undent
+            CFLAGS\t=\t-Wall -O2
+          EOS
+        end
+      end
+    end
+
+    context "multiple flags" do
+      let(:string) do
+        <<-EOS.undent
+          OTHER=def
+          FLAG = abc
+          FLAG2 = def
+          OTHER2=def
+        EOS
+      end
+
+      specify "are be successfully removed" do
+        subject.remove_make_var! ["FLAG", "FLAG2"]
+        expect(subject).to eq <<-EOS.undent
+          OTHER=def
+          OTHER2=def
+        EOS
+      end
+    end
+  end
+
+  describe "#get_make_var" do
+    context "with spaces" do
+      let(:string) do
+        <<-EOS.undent
+          CFLAGS = -Wall -O2
+          LDFLAGS = -lcrypto -lssl
+        EOS
+      end
+
+      it "extracts the value for a given variable" do
+        expect(subject.get_make_var("CFLAGS")).to eq("-Wall -O2")
+      end
+    end
+
+    context "with tabs" do
+      let(:string) do
+        <<-EOS.undent
+          CFLAGS\t=\t-Wall -O2
+          LDFLAGS\t=\t-lcrypto -lssl
+        EOS
+      end
+
+      it "extracts the value for a given variable" do
+        expect(subject.get_make_var("CFLAGS")).to eq("-Wall -O2")
+      end
+    end
+  end
+
+  describe "#sub!" do
+    let(:string) { "foo" }
+
+    it "replaces the first occurence" do
+      subject.sub!("o", "e")
+      expect(subject).to eq("feo")
+    end
+  end
+
+  describe "#gsub!" do
+    let(:string) { "foo" }
+
+    it "replaces the all occurences" do
+      subject.gsub!("o", "e") # rubocop:disable Performance/StringReplacement
+      expect(subject).to eq("fee")
+    end
+  end
+end
+
+describe Utils::Inreplace do
+  let(:file) { Tempfile.new("test") }
+
+  before(:each) do
+    file.write <<-EOS.undent
+      a
+      b
+      c
+    EOS
+  end
+
+  after(:each) { file.unlink }
+
+  it "raises error if there is nothing to replace" do
+    expect {
+      described_class.inreplace file.path, "d", "f"
+    }.to raise_error(Utils::InreplaceError)
+  end
+
+  it "raises error if there is nothing to replace" do
+    expect {
+      described_class.inreplace(file.path) do |s|
+        s.gsub!("d", "f") # rubocop:disable Performance/StringReplacement
+      end
+    }.to raise_error(Utils::InreplaceError)
+  end
+
+  it "raises error if there is nothing to replace" do
+    expect {
+      described_class.inreplace(file.path) do |s|
+        s.change_make_var! "VAR", "value"
+        s.remove_make_var! "VAR2"
+      end
+    }.to raise_error(Utils::InreplaceError)
+  end
+end
diff --git a/Library/Homebrew/test/inreplace_test.rb b/Library/Homebrew/test/inreplace_test.rb
deleted file mode 100644
index 0e62f9d3f..000000000
--- a/Library/Homebrew/test/inreplace_test.rb
+++ /dev/null
@@ -1,119 +0,0 @@
-require "testing_env"
-require "extend/string"
-require "utils/inreplace"
-
-class InreplaceTest < Homebrew::TestCase
-  def test_change_make_var
-    # Replace flag
-    s1 = "OTHER=def\nFLAG = abc\nFLAG2=abc"
-    s1.extend(StringInreplaceExtension)
-    s1.change_make_var! "FLAG", "def"
-    assert_equal "OTHER=def\nFLAG=def\nFLAG2=abc", s1
-  end
-
-  def test_change_make_var_empty
-    # Replace empty flag
-    s1 = "OTHER=def\nFLAG = \nFLAG2=abc"
-    s1.extend(StringInreplaceExtension)
-    s1.change_make_var! "FLAG", "def"
-    assert_equal "OTHER=def\nFLAG=def\nFLAG2=abc", s1
-  end
-
-  def test_change_make_var_empty_2
-    # Replace empty flag
-    s1 = "FLAG = \nmv file_a file_b"
-    s1.extend(StringInreplaceExtension)
-    s1.change_make_var! "FLAG", "def"
-    assert_equal "FLAG=def\nmv file_a file_b", s1
-  end
-
-  def test_change_make_var_append
-    # Append to flag
-    s1 = "OTHER=def\nFLAG = abc\nFLAG2=abc"
-    s1.extend(StringInreplaceExtension)
-    s1.change_make_var! "FLAG", "\\1 def"
-    assert_equal "OTHER=def\nFLAG=abc def\nFLAG2=abc", s1
-  end
-
-  def test_change_make_var_shell_style
-    # Shell variables have no spaces around =
-    s1 = "OTHER=def\nFLAG=abc\nFLAG2=abc"
-    s1.extend(StringInreplaceExtension)
-    s1.change_make_var! "FLAG", "def"
-    assert_equal "OTHER=def\nFLAG=def\nFLAG2=abc", s1
-  end
-
-  def test_remove_make_var
-    # Replace flag
-    s1 = "OTHER=def\nFLAG = abc\nFLAG2 = def"
-    s1.extend(StringInreplaceExtension)
-    s1.remove_make_var! "FLAG"
-    assert_equal "OTHER=def\nFLAG2 = def", s1
-  end
-
-  def test_remove_make_vars
-    # Replace flag
-    s1 = "OTHER=def\nFLAG = abc\nFLAG2 = def\nOTHER2=def"
-    s1.extend(StringInreplaceExtension)
-    s1.remove_make_var! ["FLAG", "FLAG2"]
-    assert_equal "OTHER=def\nOTHER2=def", s1
-  end
-
-  def test_get_make_var
-    s = "CFLAGS = -Wall -O2\nLDFLAGS = -lcrypto -lssl"
-    s.extend(StringInreplaceExtension)
-    assert_equal "-Wall -O2", s.get_make_var("CFLAGS")
-  end
-
-  def test_change_make_var_with_tabs
-    s = "CFLAGS\t=\t-Wall -O2\nLDFLAGS\t=\t-lcrypto -lssl"
-    s.extend(StringInreplaceExtension)
-
-    assert_equal "-Wall -O2", s.get_make_var("CFLAGS")
-
-    s.change_make_var! "CFLAGS", "-O3"
-    assert_equal "CFLAGS=-O3\nLDFLAGS\t=\t-lcrypto -lssl", s
-
-    s.remove_make_var! "LDFLAGS"
-    assert_equal "CFLAGS=-O3\n", s
-  end
-
-  def test_sub_gsub
-    s = "foo"
-    s.extend(StringInreplaceExtension)
-
-    s.sub!("f", "b")
-    assert_equal "boo", s
-
-    # Under current context, we are testing `String#gsub!`, so let's disable rubocop temporarily.
-    s.gsub!("o", "e") # rubocop:disable Performance/StringReplacement
-    assert_equal "bee", s
-  end
-
-  def test_inreplace_errors
-    require "tempfile"
-    extend(Utils::Inreplace)
-
-    file = Tempfile.new("test")
-
-    file.write "a\nb\nc\n"
-
-    assert_raises(Utils::InreplaceError) do
-      inreplace file.path, "d", "f"
-    end
-
-    assert_raises(Utils::InreplaceError) do
-      # Under current context, we are testing `String#gsub!`, so let's disable rubocop temporarily.
-      inreplace(file.path) { |s| s.gsub!("d", "f") } # rubocop:disable Performance/StringReplacement
-    end
-
-    assert_raises(Utils::InreplaceError) do
-      inreplace(file.path) do |s|
-        s.change_make_var! "VAR", "value"
-        s.remove_make_var! "VAR2"
-      end
-    end
-  ensure
-    file.unlink
-  end
-end