added unit testing, and started implementing unit tests...phew

node_modules/winston/test/transports/file-create-dir-test.js

@@ -0,0 +1,43 @@
+'use strict';
+
+const fs = require('fs');
+const assert = require('assert');
+const path = require('path');
+const winston = require('../../lib/winston');
+
+/* eslint-disable no-sync */
+
+describe('winston/transports/file/createLogDir', function () {
+  const logDir = path.resolve(__dirname, '../fixtures/temp_logs');
+
+  beforeEach(function () {
+    fs.rmdirSync(logDir);
+  });
+
+  it('should create directory if it does not exist', function () {
+    winston.createLogger({
+      transports: [
+        new winston.transports.File({
+          filename: path.join(logDir, 'file.log')
+        })
+      ]
+    });
+
+    assert(fs.existsSync(logDir));
+  });
+
+  it('should create directory if it does not exist when write to the stream', function () {
+    const streamfile = path.join(logDir, 'simple-stream.log');
+    const stream = fs.createWriteStream(streamfile);
+
+    winston.createLogger({
+      transports: [
+        new winston.transports.File({
+          stream: stream
+        })
+      ]
+    });
+
+    assert(fs.existsSync(logDir));
+  });
+});