Switch from deprecated nodeunit test runner to tape.

package.json

@@ -13,10 +13,10 @@
   },
   "bugs": "https://github.com/DavidAnson/markdownlint/issues",
   "scripts": {
-    "test": "nodeunit test/markdownlint-test.js",
-    "test-cover": "nyc --check-coverage --skip-full node_modules/nodeunit/bin/nodeunit test/markdownlint-test.js",
+    "test": "node test/markdownlint-test.js",
+    "test-cover": "nyc --check-coverage --skip-full node test/markdownlint-test.js",
     "test-declaration": "cd example/typescript && tsc && node type-check.js",
-    "test-extra": "nodeunit test/markdownlint-test-extra.js",
+    "test-extra": "node test/markdownlint-test-extra.js",
     "debug": "node debug node_modules/nodeunit/bin/nodeunit",
     "lint": "eslint lib helpers test schema && eslint --env browser --global markdownit --global markdownlint --rule \"no-unused-vars: 0, no-extend-native: 0, max-statements: 0, no-console: 0, no-var: 0\" demo && eslint --rule \"no-console: 0, no-invalid-this: 0, no-shadow: 0, object-property-newline: 0\" example",
     "ci": "npm run test-cover && npm run lint && npm run test-declaration",
@@ -44,9 +44,9 @@
     "markdown-it-sub": "~1.0.0",
     "markdown-it-sup": "~1.0.0",
     "markdownlint-rule-helpers": "~0.5.0",
-    "nodeunit": "~0.11.3",
     "nyc": "~14.1.1",
     "rimraf": "~3.0.0",
+    "tape": "~4.12.1",
     "toml": "~3.0.0",
     "tv4": "~1.3.0",
     "typescript": "~3.7.3",

test/markdownlint-test-extra.js

@@ -5,6 +5,7 @@
 const fs = require("fs");
 const path = require("path");
 const glob = require("glob");
+const tape = require("tape");
 const markdownlint = require("../lib/markdownlint");
 const { utf8Encoding } = require("../helpers");
 
@@ -17,18 +18,21 @@ files.filter((file) => /\.md$/.test(file)).forEach((file) => {
     strings[content.length.toString()] = content;
     content = content.slice(0, -1);
   }
-  module.exports[`type ${file}`] = (test) => {
+  tape(`type ${file}`, (test) => {
+    test.plan(1);
     markdownlint.sync({
       // @ts-ignore
       strings,
       "resultVersion": 0
     });
-    test.done();
-  };
+    test.pass();
+    test.end();
+  });
 });
 
 // Parses all Markdown files in all package dependencies
-module.exports.parseAllFiles = (test) => {
+tape("parseAllFiles", (test) => {
+  test.plan(2);
   const globOptions = {
     // "cwd": "/",
     "realpath": true
@@ -40,7 +44,7 @@ module.exports.parseAllFiles = (test) => {
     };
     markdownlint(markdownlintOptions, (errr) => {
       test.ifError(errr);
-      test.done();
+      test.end();
     });
   });
-};
+});