Merge pull request #880 from mbj/remove/relative-class-usage

Remove relative class usage

Author: mbj

spec/unit/mutant/isolation/fork_spec.rb

@@ -17,7 +17,7 @@
   let(:log_reader)        { instance_double(IO, :log_reader)            }
   let(:log_writer)        { instance_double(IO, :log_writer)            }
   let(:marshal)           { class_double(Marshal)                       }
-  let(:pid)               { class_double(0.class)                       }
+  let(:pid)               { class_double(Integer)                       }
   let(:process)           { class_double(Process)                       }
   let(:result_fragment)   { 'result body'                               }
   let(:result_reader)     { instance_double(IO, :result_reader)         }

spec/unit/mutant/loader_spec.rb

@@ -12,7 +12,7 @@ def apply
 
   let(:path)     { instance_double(Pathname, to_s: path_str) }
   let(:path_str) { instance_double(String)                   }
-  let(:line)     { instance_double(0.class)                  }
+  let(:line)     { instance_double(Integer)                  }
   let(:kernel)   { class_double(Kernel)                      }
   let(:binding)  { instance_double(Binding)                  }
   let(:source)   { instance_double(String)                   }