feat(travis-ci): add travis-ci

Author: sanemat

lib/env_pull_request/base.rb

@@ -7,7 +7,11 @@ def initialize
     end
 
     def fetch_pull_request_id
-      nil
+      if ENV['TRAVIS_PULL_REQUEST'] && ENV['TRAVIS_PULL_REQUEST'].downcase != 'false'
+        ENV['TRAVIS_PULL_REQUEST'].to_i
+      else
+        nil
+      end
     end
 
     def pull_request?

test/test_ci.rb

@@ -2,17 +2,46 @@
 
 module EnvPullRequest
   class TestCi < Test::Unit::TestCase
+    def self.startup
+      @original_travis_pull_request = ENV['TRAVIS_PULL_REQUEST']
+      ENV.delete 'TRAVIS_PULL_REQUEST'
+    end
+
+    def self.shutdown
+      ENV['TRAVIS_PULL_REQUEST'] = @original_travis_pull_request
+    end
+
     sub_test_case 'not pull request' do
       test '#pull_request?' do
-        env = EnvPullRequest.new
         assert do
-          env.pull_request? == false
+          EnvPullRequest.new.pull_request? == false
+        end
+      end
+      test '#pull_request_id' do
+        assert do
+          EnvPullRequest.new.pull_request_id.nil?
+        end
+      end
+    end
+
+    sub_test_case 'travis-ci' do
+      pull_id = 800
+      setup do
+        ENV['TRAVIS_PULL_REQUEST'] = pull_id.to_s
+      end
+
+      teardown do
+        ENV.delete 'TRAVIS_PULL_REQUEST'
+      end
+
+      test '#pull_request?' do
+        assert do
+          EnvPullRequest.new.pull_request? == true
         end
       end
       test '#pull_request_id' do
-        env = EnvPullRequest.new
         assert do
-          env.pull_request_id.nil?
+          EnvPullRequest.new.pull_request_id == pull_id
         end
       end
     end