Added specs for Gem::Tasks::SCM::Tag#version_tag.

spec/scm/tag_spec.rb

@@ -0,0 +1,42 @@
+require 'spec_helper'
+require 'rake_context'
+
+require 'rubygems/tasks/scm/tag'
+
+describe Gem::Tasks::SCM::Tag do
+  let(:version) { '1.2.3' }
+
+  describe "#version_tag" do
+    context "default" do
+      include_context "rake"
+
+      it "should not have a prefix or suffix" do
+        subject.version_tag(version).should == version
+      end
+    end
+
+    context "with format String" do
+      include_context "rake"
+
+      let(:format) { 'v%s' }
+
+      subject { described_class.new(:format => format) }
+
+      it "should apply the format String to the version" do
+        subject.version_tag(version).should == "v#{version}"
+      end
+    end
+
+    context "with format Proc" do
+      include_context "rake"
+
+      let(:format) { proc { |ver| "REL_" + ver.tr('.','_') } }
+
+      subject { described_class.new(:format => format) }
+
+      it "should call the format Proc with the version" do
+        subject.version_tag(version).should == "REL_1_2_3"
+      end
+    end
+  end
+end