tests

babel.config.js

@@ -0,0 +1,7 @@
+// babel.config.js
+module.exports = {
+	presets: [
+	  ['@babel/preset-env', {targets: {node: 'current'}}],
+       '@babel/preset-typescript',
+	],
+  };

package.json

@@ -5,16 +5,23 @@
   "main": "main.js",
   "scripts": {
     "dev": "rollup --config rollup.config.js -w",
-    "build": "rollup --config rollup.config.js --environment BUILD:production"
+    "build": "rollup --config rollup.config.js --environment BUILD:production",
+    "test": "jest"
   },
   "keywords": [],
   "author": "",
   "license": "MIT",
   "devDependencies": {
+    "@babel/core": "^7.14.8",
+    "@babel/preset-env": "^7.14.9",
+    "@babel/preset-typescript": "^7.14.5",
     "@rollup/plugin-commonjs": "^18.0.0",
     "@rollup/plugin-node-resolve": "^11.2.1",
     "@rollup/plugin-typescript": "^8.2.1",
+    "@types/jest": "^26.0.24",
     "@types/node": "^14.14.37",
+    "babel-jest": "^27.0.6",
+    "jest": "^27.0.6",
     "obsidian": "^0.12.0",
     "rollup": "^2.32.1",
     "tslib": "^2.2.0",

rules.ts

@@ -4,7 +4,8 @@ export const rules: { [name: string] : (text: string, params?: any) => string }
 		return text.replace(/[ \t]+$/gm, "");
 	},
 	"newlines_around_headings" : (text: string) => {
-		return text.replace(/\n*^(#+ .*)\n*/gm, "\n\n$1\n\n");
+		text = text.replace(/\n*(#+ .*)\n+/g, "\n\n$1\n\n");
+		return text.replace(/\n*(#+ .*)/g, "\n\n$1");
 	},
 	"spaces_after_list_markers" : (text: string) => {
 		// Space after marker

test.ts

@@ -0,0 +1,34 @@
+import { rules } from './rules';
+
+test("trailing_spaces", () => {
+	const text = 
+	`
+# H1   
+line with trailing spaces and tabs    	`;
+	const expected = `
+# H1
+line with trailing spaces and tabs`;
+	expect(rules['trailing_spaces'](text)).toBe(expected);
+});
+
+test("newlines_around_headings", () => {
+	const text = `
+# H1
+## H2
+
+
+# H1
+line`;
+	const expected = `
+
+# H1
+
+## H2
+
+# H1
+
+line`;
+	expect(rules['newlines_around_headings'](text)).toBe(expected);
+});
+
+