test: Adding tests for createSlug.

ollelauribostrom · MylesBorins · commit 8fdd0984cf7e · 2019-02-20T16:40:13.000-05:00
diff --git a/src/util/createSlug.js b/src/util/createSlug.js
@@ -13,7 +13,9 @@ function createSlug(title) {
 
   return slug
     .replace(/[^\w\-]+/g, '') // Remove any non word characters
-    .replace(/\-\-+/g, '-');  // Replace multiple hyphens
+    .replace(/\-\-+/g, '-')   // Replace multiple hyphens with single
+    .replace(/^-/, '')        // Remove any leading hyphen
+    .replace(/-$/, '');       // Remove any trailing hyphen
 }
 
 module.exports = createSlug;
diff --git a/test/util/createSlug.test.js b/test/util/createSlug.test.js
@@ -0,0 +1,32 @@
+import createSlug from '../../src/util/createSlug';
+
+describe('Tests for createSlug', () => {
+  it('generates a slug', () => {
+    const slugs = [
+      'How to install Node.js',
+      'The V8 JavaScript Engine',
+      'The package.json guide',
+      'Node.js & something.',
+      '/usr/local/nodejs/bin',
+      'a_b_c',
+      'a, b and c',
+      'title: subtitle',
+      'a; b',
+      'C:\\Program Files\\nodejs',
+      'a---b'
+    ].map(createSlug);
+    expect(slugs).toEqual([
+      'how-to-install-nodejs',
+      'the-v8-javascript-engine',
+      'the-package-json-guide',
+      'nodejs-and-something',
+      'usr-local-nodejs-bin',
+      'a-b-c',
+      'a-b-and-c',
+      'title-subtitle',
+      'a-b',
+      'c-program-files-nodejs',
+      'a-b'
+    ]);
+  });
+});

Original file line number	Diff line number	Diff line change
`@@ -13,7 +13,9 @@ function createSlug(title) {`
`13`	`13`
`14`	`14`	`return slug`
`15`	`15`	`.replace(/[^\w\-]+/g, '') // Remove any non word characters`
`16`		`- .replace(/\-\-+/g, '-'); // Replace multiple hyphens`
	`16`	`+ .replace(/\-\-+/g, '-') // Replace multiple hyphens with single`
	`17`	`+ .replace(/^-/, '') // Remove any leading hyphen`
	`18`	`+ .replace(/-$/, ''); // Remove any trailing hyphen`
`17`	`19`	`}`
`18`	`20`
`19`	`21`	`module.exports = createSlug;`