Add basic unit tests with Ava runner

README.md

@@ -45,9 +45,9 @@ The example directory contains a more detailed example.
 
 ## Test
 
-There are currently no tests.
-If you have ideas,
-please open an issue.
+```sh
+npm test
+```
 
 ## Future
 

package.json

@@ -1,6 +1,9 @@
 {
   "name": "portscanner",
   "description": "Asynchronous port scanner for Node.js",
+  "scripts": {
+    "test": "ava"
+  },
   "keywords": [
     "portscanner",
     "port",
@@ -29,7 +32,9 @@
   "dependencies": {
     "async": "0.1.15"
   },
-  "devDependencies": {},
+  "devDependencies": {
+    "ava": "^0.4.2"
+  },
   "engines": {
     "node": ">=0.4",
     "npm": ">=1.0.0"

test.js

@@ -0,0 +1,89 @@
+import path from 'path';
+import fs from 'fs';
+import net from 'net';
+
+import test from 'ava';
+
+import portScanner from './lib/portscanner.js'
+
+test.before('Set #1 test server', t => {
+    const server = net.createServer();
+    server.listen(3000, '127.0.0.1', () => t.end());
+});
+
+test.before('Set #2 test server', t => {
+    const server2 = net.createServer();
+    server2.listen(2999, '127.0.0.1', () => t.end());
+});
+
+
+/* checkPortStatus */
+
+test('checkPortStatus - taken', t => {
+    t.plan(2);
+
+    portScanner.checkPortStatus(3000, '127.0.0.1', (error, port) => {
+        t.is(error, null);
+        t.is(port, 'open');
+    });
+});
+
+test('checkPortStatus - free', t => {
+    t.plan(2);
+
+    portScanner.checkPortStatus(3001, '127.0.0.1', (error, port) => {
+        t.is(error, null);
+        t.is(port, 'closed');
+    });
+});
+
+
+/* findPortInUse */
+
+test('findPortInUse - taken port in range', t => {
+    t.plan(2);
+
+    portScanner.findAPortInUse(3000, 3010, '127.0.0.1', (error, port) => {
+        t.is(error, null);
+        t.is(port, 3000);
+    });
+});
+
+test('findPortInUse - all ports in range free', t => {
+    t.plan(2);
+
+    portScanner.findAPortInUse(3001, 3010, '127.0.0.1', (error, port) => {
+        t.is(error, null);
+        t.false(port);
+    });
+});
+
+
+/* findPortNotInUse */
+
+test('findAPortNotInUse - start from free port', t => {
+    t.plan(2);
+
+    portScanner.findAPortNotInUse(3001, 3010, '127.0.0.1', (error, port) => {
+        t.is(error, null);
+        t.true(port >= 3001 && port <= 3010);
+    });
+});
+
+test('findAPortNotInUse - start from taken port', t => {
+    t.plan(2);
+
+    portScanner.findAPortNotInUse(3000, 3010, '127.0.0.1', (error, port) => {
+        t.is(error, null);
+        t.true(port >= 3001 && port <= 3010);
+    });
+});
+
+test('findAPortNotInUse - all ports in range taken', t => {
+    t.plan(2);
+
+    portScanner.findAPortNotInUse(2999, 3000, '127.0.0.1', (error, port) => {
+        t.is(error, null);
+        t.false(port);
+    });
+});