add tests for non-source files

.travis.yml

@@ -8,6 +8,12 @@ matrix:
       script: bundle exec rake rubocop build
       env: NAME="Lint and Build"
 
+    # non-source tests
+    - language: ruby
+      rvm: 2.4.0
+      script: ./script/test core
+      env: NAME="Core"
+
     # go 1.7 tests
     - language: go
       go: "1.7.x"

Rakefile

@@ -47,6 +47,20 @@ namespace :test do
       t.test_files = FileList["test/commands/*_test.rb", "test/sources/#{source}_test.rb"]
     end
   end
+
+  namespace :core do
+    task :env do
+      ENV["SOURCE"] = ""
+    end
+  end
+
+  Rake::TestTask.new(:core => "test:core:env") do |t|
+    t.description = "Run non-source tests"
+    t.libs << "test"
+    t.libs << "lib"
+    t.test_files = FileList["test/**/*_test.rb"].exclude("test/fixtures/**/*_test.rb")
+                                                .exclude("test/sources/*_test.rb")
+  end
 end
 
 Rake::TestTask.new(:test) do |t|