Added additional tests to satisfy code coverage

Author: mtscout6

.gitignore

@@ -3,4 +3,5 @@
 node_modules
 build
 *.node
-components
+components
+coverage

test/PluginError.js

@@ -98,6 +98,36 @@ describe('PluginError()', function(){
     err.toString().indexOf('fileName:').should.equal(-1);
   });
 
+  it('should not show properties, but should show stack', function() {
+    var err = new util.PluginError('test', 'it broke', {showStack: true, showProperties: false});
+    err.fileName = 'original.js';
+    err.lineNumber = 35;
+    err.toString().indexOf('message:').should.equal(-1);
+    err.toString().indexOf('fileName:').should.equal(-1);
+  });
+
+  it('should not show properties, but should show stack for real error', function() {
+    var realErr = new Error('something broke');
+    realErr.fileName = 'original.js';
+    realErr.lineNumber = 35;
+    realErr.stack = 'test stack';
+    var err = new util.PluginError('test', realErr, {showStack: true, showProperties: false});
+    err.toString().indexOf('message:').should.equal(-1);
+    err.toString().indexOf('fileName:').should.equal(-1);
+    err.toString().indexOf('test stack').should.not.equal(-1);
+  });
+
+  it('should not show properties, but should show stack for _stack', function() {
+    var realErr = new Error('something broke');
+    realErr.fileName = 'original.js';
+    realErr.lineNumber = 35;
+    var err = new util.PluginError('test', realErr, {showStack: true, showProperties: false});
+    err._stack = 'test stack';
+    err.toString().indexOf('message:').should.equal(-1);
+    err.toString().indexOf('fileName:').should.equal(-1);
+    err.toString().indexOf('test stack').should.not.equal(-1);
+  });
+
   it('should show properties and stack', function(){
     var realErr = new Error('something broke');
     realErr.fileName = 'original.js';