FileSystem: JSDoc: Fixed a typo in writeToFile(), added a unit test (#3897)

* FileSystem: JSDoc: Fixed a typo in writeToFile()

* Added a unit test for writeToFile()

Author: mirao

docs/helpers/FileSystem.md

@@ -140,7 +140,7 @@ I.waitForFile('largeFilesName.txt', 10); // wait 10 seconds for file
 
 ### writeToFile
 
-Writes test to file
+Writes text to file
 
 #### Parameters
 

lib/helper/FileSystem.js

@@ -52,7 +52,7 @@ class FileSystem extends Helper {
   }
 
   /**
-   * Writes test to file
+   * Writes text to file
    * @param {string} name
    * @param {string} text
    */

test/unit/helper/FileSystem_test.js

@@ -43,4 +43,12 @@ describe('FileSystem', () => {
 for FileSystem helper
 test`);
   });
+
+  it('should write text to file', () => {
+    const outputFilePath = 'data/output/fs_output.txt';
+    const text = '123';
+    fs.writeToFile(outputFilePath, text);
+    fs.seeFile(outputFilePath);
+    fs.seeInThisFile(text);
+  });
 });