Added new test cases to increase code coverage

.all-contributorsrc

@@ -68,6 +68,15 @@
       "contributions": [
         "design"
       ]
+    },
+    {
+      "login": "ratnamal",
+      "name": "Ratnamala Korlepara",
+      "avatar_url": "https://avatars0.githubusercontent.com/u/36140652?v=4",
+      "profile": "https://github.com/ratnamal",
+      "contributions": [
+        "test"
+      ]
     }
   ],
   "contributorsPerLine": 7

README.md

@@ -4,7 +4,7 @@
   </br>
     PostCSS plugin for adding multiple themes to CSS files.
   </p>
-  <div> 
+  <div>
     <a href="https://circleci.com/gh/intuit/postcss-themed"><img src="https://circleci.com/gh/intuit/postcss-themed.svg?style=svg"></a>
     <a href="https://www.npmjs.com/package/postcss-themed"><img src="https://img.shields.io/npm/v/postcss-themed.svg?style=flat-square&logo=npm" alt="npm" /></a>
     <a href="https://github.com/prettier/prettier"><img src="https://img.shields.io/badge/styled_with-prettier-ff69b4.svg" alt="styled with prettier" /></a>
@@ -390,6 +390,7 @@ Thanks goes to these wonderful people ([emoji key](https://allcontributors.org/d
     <td align="center"><a href="https://christyjacob4.github.io"><img src="https://avatars1.githubusercontent.com/u/20852629?v=4" width="100px;" alt="Christy Jacob"/><br /><sub><b>Christy Jacob</b></sub></a><br /><a href="https://github.com/intuit/postcss-themed/commits?author=christyjacob4" title="Code">💻</a></td>
     <td align="center"><a href="https://github.com/Sharps"><img src="https://avatars2.githubusercontent.com/u/8174841?v=4" width="100px;" alt="Sharps"/><br /><sub><b>Sharps</b></sub></a><br /><a href="#design-Sharps" title="Design">🎨</a></td>
     <td align="center"><a href="https://www.behance.net/amandayoshiizumi"><img src="https://avatars0.githubusercontent.com/u/30158643?v=4" width="100px;" alt="Amanda Yoshiizumi"/><br /><sub><b>Amanda Yoshiizumi</b></sub></a><br /><a href="#design-mandyellow" title="Design">🎨</a></td>
+    <td align="center"><a href="https://github.com/ratnamal"><img src="https://avatars0.githubusercontent.com/u/36140652?v=4" width="100px;" alt="Ratnamala Korlepara"/><br /><sub><b>Ratnamala Korlepara</b></sub></a><br /><a href="https://github.com/intuit/postcss-themed/commits?author=ratnamal" title="Tests">⚠️</a></td>
   </tr>
 </table>
 

__tests__/legacy.test.ts

@@ -478,7 +478,7 @@ it('multiple themes + theme-root', () => {
       .light.expanded {
         width: 10px;
       }
-      .dark.expanded { 
+      .dark.expanded {
         width: 100px;
       }
     `,
@@ -517,7 +517,7 @@ it('multiple themes + fallback', () => {
       .light.expanded {
         border: 1px solid white;
       }
-      .dark.expanded { 
+      .dark.expanded {
         border: 1px solid black;
       }
     `,
@@ -641,7 +641,7 @@ it('multiple selectors - theme root', () => {
         background: @theme color;
         width: @theme width;
       }
-    }    
+    }
     `,
     `
       .item {
@@ -689,7 +689,7 @@ it('dark themes', () => {
     `
       .item {
         color: @theme color;
-      }    
+      }
     `,
     `
       .item {
@@ -732,7 +732,7 @@ it('overrides themes to single theme', () => {
   }
   `;
 
-  return postcss([plugin({ config, defaultTheme: 'quickBooks', forceSingleTheme: true })])
+  return postcss([plugin({ config, defaultTheme: 'quickBooks', forceSingleTheme: 'true' })])
     .process(input, { from: undefined })
     .catch(e => {
       expect(e.message).toContain(
@@ -773,7 +773,7 @@ it('when theme = light , forceSingleTheme = true, single selector is generated',
     {
       config,
       defaultTheme: 'light',
-      forceSingleTheme: true,
+      forceSingleTheme: 'true',
     }
   );
 });
@@ -806,19 +806,45 @@ it('when theme = light , forceSingleTheme = false, multiple selectors are genera
         width: 10px;
         color: white;
       }
-      .default .expanded,.default  .foo {
-        width: 1px;
+    `,
+    {
+      config,
+      defaultTheme: 'light',
+      forceSingleTheme: 'false',
+    }
+  );
+});
+
+it('Adding empty selectors to final output. Part of legacy code', () => {
+  const config = {
+    default: {
+      color: 'purple'
+    },
+    light: {
+      color: 'white'
+    }
+  };
+
+  return run(
+    `
+      .test {
+        color: @theme color;
+      }
+    `,
+    `
+      .test {
         color: purple;
       }
-      .dark .expanded,.dark  .foo {
-        width: 20px;
-        color: black;
+      .light .test {
+        color: white;
       }
+      .default {}
+      .light {}
+      .dark {}
     `,
     {
       config,
-      defaultTheme: 'light',
-      forceSingleTheme: false,
+      forceEmptyThemeSelectors: true
     }
   );
 });

__tests__/modern.test.ts

@@ -383,3 +383,32 @@ it('scoped variable names with custom function', () => {
     }
   );
 });
+
+it('Wrong key mentioned in theme configuration', () => {
+  const config = {
+    default: {
+      color: 'purple'
+    },
+    light: {
+      color: 'white'
+    }
+  };
+
+  return run(
+    `
+      .test {
+        background-color: @theme background-color;
+      }
+    `,
+    `
+      .test {
+      }
+    `,
+    {
+      config,
+      forceSingleTheme: 'mint',
+      optimizeSingleTheme: true
+    }
+  );
+});
+