Add test for classes with variants

test.js

@@ -11,11 +11,11 @@ const disableCorePlugins = () => {
   })
 }
 
-const generatePluginCss = () => {
+const generatePluginCss = (options = {}) => {
   return postcss(
     tailwindcss({
       corePlugins: disableCorePlugins(),
-      plugins: [plugin()]
+      plugins: [plugin(options)]
     })
   )
   .process('@tailwind utilities;', {
@@ -30,7 +30,7 @@ expect.extend({
   toMatchCss: cssMatcher
 })
 
-test('it generates classes', () => {
+test('it generates the correct classes with no variants', () => {
   return generatePluginCss().then(css => {
     expect(css).toMatchCss(`
       .test {
@@ -39,3 +39,21 @@ test('it generates classes', () => {
     `)
   })
 })
+
+test('it generates the correct classes with variants', () => {
+  return generatePluginCss({ variants: ['hover', 'focus'] }).then(css => {
+    expect(css).toMatchCss(`
+      .test {
+        display: block;
+      }
+
+      .hover\\:test:hover {
+        display: block;
+      }
+
+      .focus\\:test:focus {
+        display: block;
+      }
+    `)
+  })
+})