Add some test coverage in frontend/lib (#2615)

frontend/lib/badge-url.spec.js

@@ -45,5 +45,23 @@ describe('Badge URL functions', function() {
         '&style=plastic',
       ].join('')
     )
+
+    const suffix = '<- value'
+    const color = 'blue'
+    given('http://img.example.com', 'json', 'foo', dataUrl, query, {
+      suffix,
+      color,
+      style: 'plastic',
+    }).expect(
+      [
+        'http://img.example.com/badge/dynamic/json.svg',
+        '?label=foo',
+        `&url=${encodeURIComponent(dataUrl)}`,
+        `&query=${encodeURIComponent(query)}`,
+        '&colorB=blue',
+        `&suffix=${encodeURIComponent(suffix)}`,
+        '&style=plastic',
+      ].join('')
+    )
   })
 })

frontend/lib/generate-image-markup.spec.js

@@ -1,5 +1,53 @@
 import { test, given } from 'sazerac'
-import generateAllMarkup from './generate-image-markup'
+import generateAllMarkup, {
+  markdown,
+  reStructuredText,
+  asciiDoc,
+} from './generate-image-markup'
+
+test(markdown, () => {
+  given('https://img.shields.io/badge.svg', undefined, 'Example').expect(
+    '![Example](https://img.shields.io/badge.svg)'
+  )
+  given(
+    'https://img.shields.io/badge.svg',
+    'https://example.com/example',
+    'Example'
+  ).expect(
+    '[![Example](https://img.shields.io/badge.svg)](https://example.com/example)'
+  )
+})
+
+test(reStructuredText, () => {
+  given('https://img.shields.io/badge.svg', undefined, 'Example').expect(
+    '.. image:: https://img.shields.io/badge.svg   :alt: Example'
+  )
+  given(
+    'https://img.shields.io/badge.svg',
+    'https://example.com/example',
+    'Example'
+  ).expect(
+    '.. image:: https://img.shields.io/badge.svg   :alt: Example   :target: https://example.com/example'
+  )
+})
+
+test(asciiDoc, () => {
+  given('https://img.shields.io/badge.svg', undefined, 'Example').expect(
+    'image:https://img.shields.io/badge.svg[Example]'
+  )
+  given(
+    'https://img.shields.io/badge.svg',
+    undefined,
+    'Example, with comma'
+  ).expect('image:https://img.shields.io/badge.svg["Example, with comma"]')
+  given(
+    'https://img.shields.io/badge.svg',
+    'https://example.com/example',
+    'Example'
+  ).expect(
+    'image:https://img.shields.io/badge.svg["Example",link="https://example.com/example"]'
+  )
+})
 
 test(generateAllMarkup, () => {
   given(