fix(no-identical-title): not reporting when using backticks (#237)

Fixes #232

Author: himynameisdave

rules/__tests__/no-identical-title.test.js

@@ -12,6 +12,8 @@ ruleTester.run('no-identical-title', rule, {
       '   it("it", function() {});',
       '});',
     ].join('\n'),
+    ['describe();describe();'].join('\n'),
+    ['it();it();'].join('\n'),
     [
       'describe("describe1", function() {',
       '   it("it1", function() {});',
@@ -81,6 +83,17 @@ ruleTester.run('no-identical-title', rule, {
       '    });',
       '});',
     ].join('\n'),
+    {
+      code: [
+        'describe("describe", () => {',
+        '    it(`testing ${someVar} with the same title`, () => {});',
+        '    it(`testing ${someVar} with the same title`, () => {});',
+        '});',
+      ].join('\n'),
+      env: {
+        es6: true,
+      },
+    },
   ],
 
   invalid: [
@@ -212,5 +225,24 @@ ruleTester.run('no-identical-title', rule, {
         },
       ],
     },
+    {
+      code: [
+        'describe("describe", () => {',
+        '    it(`testing backticks with the same title`, () => {});',
+        '    it(`testing backticks with the same title`, () => {});',
+        '});',
+      ].join('\n'),
+      env: {
+        es6: true,
+      },
+      errors: [
+        {
+          message:
+            'Test title is used multiple times in the same describe block.',
+          column: 5,
+          line: 3,
+        },
+      ],
+    },
   ],
 });

rules/no-identical-title.js

@@ -1,6 +1,12 @@
 'use strict';
 
-const { getDocsUrl, isDescribe, isTestCase } = require('./util');
+const {
+  getDocsUrl,
+  isDescribe,
+  isTestCase,
+  isString,
+  hasExpressions,
+} = require('./util');
 
 const newDescribeContext = () => ({
   describeTitles: [],
@@ -34,8 +40,15 @@ const handleDescribeBlockTitles = (context, titles, node, title) => {
   titles.push(title);
 };
 
-const isFirstArgLiteral = node =>
-  node.arguments && node.arguments[0] && node.arguments[0].type === 'Literal';
+const isFirstArgValid = arg => {
+  if (!arg || !isString(arg)) {
+    return false;
+  }
+  if (arg.type === 'TemplateLiteral' && hasExpressions(arg)) {
+    return false;
+  }
+  return true;
+};
 
 module.exports = {
   meta: {
@@ -51,10 +64,10 @@ module.exports = {
         if (isDescribe(node)) {
           contexts.push(newDescribeContext());
         }
-        if (!isFirstArgLiteral(node)) {
+        const [firstArgument] = node.arguments;
+        if (!isFirstArgValid(firstArgument)) {
           return;
         }
-
         const title = node.arguments[0].value;
         handleTestCaseTitles(context, currentLayer.testTitles, node, title);
         handleDescribeBlockTitles(

rules/util.js

@@ -134,6 +134,8 @@ const isString = node =>
   (node.type === 'Literal' && typeof node.value === 'string') ||
   node.type === 'TemplateLiteral';
 
+const hasExpressions = node => node.expressions && node.expressions.length > 0;
+
 /**
  * Generates the URL to documentation for the given rule name. It uses the
  * package version to build the link to a tagged version of the
@@ -212,6 +214,7 @@ module.exports = {
   isFunction,
   isTestCase,
   isString,
+  hasExpressions,
   getDocsUrl,
   scopeHasLocalReference,
   composeFixers,