added unit test

Author: UmiKami

exercises/10-Create_a_new_function/test.js

@@ -0,0 +1,34 @@
+const fs = require('fs');
+const path = require('path');
+const rewire = require('rewire');
+
+test('shortIntroduction function exists', () => {
+  const file = rewire("./app.js");
+  const shortIntroduction = file.__get__('shortIntroduction');
+  expect(typeof shortIntroduction).toBe('function');
+});
+
+test('shortIntroduction function requires 3 arguments', () => {
+  const file = fs.readFileSync(path.resolve(__dirname, './app.js'), 'utf8');
+  const shortIntroductionRegex = /function\s*shortIntroduction\s*\(\s*\w+\s*,\s*\w+\s*,\s*\w+\s*\)\s*{/gm;
+  const hasProperParameters = shortIntroductionRegex.test(file.toString());
+  expect(hasProperParameters).toBeTruthy();
+});
+
+test("shortIntroduction function creates correct introduction", ()=>{
+    // read the content of the file
+    const file = fs.readFileSync(path.resolve(__dirname, './app.js'), 'utf8');
+
+    // Use regex pattern to check for the correct console.log within the function using template literals
+    const patternTemplate = /console\.log\(\s*`Hello! my name is \${\s*\w+\s*}, my profession is \${\s*\w+\s*}\. I am \${\s*\w+\s*} years old\.`\s*\)\s*;?/gm;
+    
+    // Use regex pattern to check for the correct console.log within the function using + operator
+    const patternPlus = /console\.log\(\s*"Hello! my name is "\s*\+\s*\w+\s*\+\s*", my profession is "\s*\+\s*\w+\s*\+\s*". I am "\s*\+\s*\w+\s*\+\s*" years old."\s*\)\s*;?/gm;
+    
+    const hasCorrectConsoleLogTemplate = patternTemplate.test(file.toString());
+    const hasCorrectConsoleLogPlus = patternPlus.test(file.toString());
+
+    expect(hasCorrectConsoleLogTemplate || hasCorrectConsoleLogPlus).toBeTruthy();
+});
+
+