fix(rules): log parse errors and fix noUnusedCss

Fix #227

package.json

@@ -9,7 +9,7 @@
     "copy:common": "cp README.md dist",
     "build:links": "ts-node build/links.ts --src ./dist",
     "prepare:package": "cat package.json | ts-node build/package.ts > dist/package.json",
-    "test": "rimraf dist && tsc && cp -r test/fixtures dist/test && mocha dist/test --recursive",
+    "test": "rimraf dist && tsc && cp -r test/fixtures dist/test && BUILD_TYPE=dev npm run set:vars && mocha dist/test --recursive",
     "test:watch": "rimraf dist && tsc && cp -r test/fixtures dist/test && BUILD_TYPE=dev npm run set:vars && mocha dist/test --watch --recursive",
     "set:vars": "ts-node build/vars.ts --src ./dist",
     "tscv": "tsc --version",

src/angular/ng2Walker.ts

@@ -133,7 +133,7 @@ export class Ng2Walker extends Lint.RuleWalker {
         const templateAst = parseTemplate(template.template.code, Config.predefinedDirectives);
         this.visitNg2TemplateHelper(templateAst, metadata, getPosition(template.node));
       } catch (e) {
-        logger.error('Cannot parse the template of', ((<any>metadata.controller || {}).name || {}).text);
+        logger.error('Cannot parse the template of', ((<any>metadata.controller || {}).name || {}).text, e);
       }
     }
     const styles = metadata.styles;
@@ -143,7 +143,7 @@ export class Ng2Walker extends Lint.RuleWalker {
         try {
           this.visitNg2StyleHelper(parseCss(style.style.code), metadata, style, getPosition(style.node));
         } catch (e) {
-          logger.error('Cannot parse the styles of', ((<any>metadata.controller || {}).name || {}).text);
+          logger.error('Cannot parse the styles of', ((<any>metadata.controller || {}).name || {}).text, e);
         }
       }
     }

src/noUnusedCssRule.ts

@@ -19,7 +19,10 @@ import {logger} from './util/logger';
 const CssSelectorTokenizer = require('css-selector-tokenizer');
 
 const getSymbolName = (t: any) => {
-  let expr = t.expression;
+  let expr = t;
+  if (t.expression) {
+    expr = t.expression;
+  }
   if (t.expression && t.expression.name) {
     expr = t.expression.name;
   }