Merge pull request #33 from jleeothon/master

Add is_version? method to String

.travis.yml

@@ -1,5 +1,8 @@
+sudo: false
 language: ruby
 rvm:
   - 2.1.10
   - 2.2.5
   - 2.3.1
+  - 2.4.3
+  - 2.5.0

lib/semantic/core_ext.rb

@@ -2,4 +2,8 @@ class String
   def to_version
     Semantic::Version.new self
   end
+
+  def is_version?
+    (match Semantic::Version::SemVerRegexp) ? true : false
+  end
 end

spec/core_ext_spec.rb

@@ -43,5 +43,21 @@
         )
       end
     end
+
+    it 'extends String with a #is_version? method' do
+      expect('').to respond_to(:is_version?)
+    end
+
+    it 'detects valid semantic version strings' do
+      @test_versions.each do |v|
+        expect(v.is_version?).to be true
+      end
+    end
+
+    it 'detects invalid semantic version strings' do
+      @bad_versions.each do |v|
+        expect(v.is_version?).to be false
+      end
+    end
   end
 end