Adding tests and linting.

.eslintrc.json

@@ -0,0 +1,30 @@
+{
+  "env": {
+    "es6": true,
+    "jest": true,
+    "node": true
+  },
+  "extends": "eslint:recommended",
+  "parserOptions": {
+    "sourceType": "module",
+    "ecmaVersion": "2017"
+  },
+  "rules": {
+    "indent": [
+      "error",
+      2
+    ],
+    "linebreak-style": [
+      "error",
+      "unix"
+    ],
+    "quotes": [
+      "error",
+      "single"
+    ],
+    "semi": [
+      "error",
+      "always"
+    ]
+  }
+}

package.json

@@ -9,14 +9,21 @@
   },
   "author": "mjswensen",
   "license": "MIT",
+  "jest": {
+    "rootDir": "lib"
+  },
   "scripts": {
-    "build": "babel --out-dir lib src",
-    "start": "watch 'yarn run build' src",
+    "build": "eslint src && babel --out-dir lib src",
+    "test": "yarn run build && jest",
+    "start": "watch 'yarn run test' src",
     "prepublish": "yarn run build"
   },
   "devDependencies": {
     "babel-cli": "^6.18.0",
     "babel-preset-latest": "^6.16.0",
+    "eslint": "^3.12.2",
+    "jest": "^18.1.0",
+    "themer-colors-default": "^1.0.1",
     "watch": "^1.0.1"
   },
   "peerDependencies": {

src/index.js

@@ -1,4 +1,4 @@
-export const render = (colors, options) => {
+export const render = (colors) => {
 
   const colorVars = colorSet => `
   let s:shade0 = "${colorSet.shade0}"
@@ -21,13 +21,13 @@ export const render = (colors, options) => {
 
   const theme = `
 
-  ${!!colors.dark ? `
+  ${'dark' in colors ? `
   if &background == 'dark'
     ${colorVars(colors.dark)}
   endif
   ` : ''}
 
-  ${!!colors.light ? `
+  ${'light' in colors ? `
   if &background == 'light'
     ${colorVars(colors.light)}
   endif

src/index.spec.js

@@ -0,0 +1,21 @@
+import { render } from './index';
+import { colors } from 'themer-colors-default';
+
+describe('themer vim lighline palette generator', () => {
+
+  const testColorSetConfiguration = (message, colors) => {
+    it(message, async() => {
+      const files = await Promise.all(render(colors, {}));
+      const fileContents = files[0].contents.toString('utf8');
+      expect(files.length).toBe(1);
+      expect(/undefined/.test(fileContents)).toBe(false);
+      expect(/'dark'/.test(fileContents)).toBe('dark' in colors);
+      expect(/'light'/.test(fileContents)).toBe('light' in colors);
+    });
+  };
+
+  testColorSetConfiguration('should produce only one file containing both schemes if passed both a dark and light theme', colors);
+  testColorSetConfiguration('should produce only one file containing only a dark scheme if passed only a dark color set', { dark: colors.dark });
+  testColorSetConfiguration('should produce only one file containing only a light scheme if passed only a light color set', { light: colors.light });
+
+});