From 37108991acf3413754c6d254ab4a8730ce82f3be Mon Sep 17 00:00:00 2001
From: OleksiiMishchenko <alex.mishch@gmail.com>
Date: Sun, 24 Nov 2024 22:01:53 +0200
Subject: [PATCH] Solution

---
 src/validateEmail.test.js | 41 ++++++++++++++++++++++++++++++++-------
 1 file changed, 34 insertions(+), 7 deletions(-)

diff --git a/src/validateEmail.test.js b/src/validateEmail.test.js
index 63a3673..545258a 100644
--- a/src/validateEmail.test.js
+++ b/src/validateEmail.test.js
@@ -3,18 +3,45 @@
 describe(`Function 'validateEmail':`, () => {
   const validateEmail = require('./validateEmail');
 
-  it(`should be declared`, () => {
-    expect(validateEmail).toBeInstanceOf(Function);
-  });
+  it(`should be declared`, () => expect(validateEmail).toBeDefined());
 
   it(`should return boolean`, () => {
-
+    expect(typeof validateEmail('')).toBe('boolean');
   });
 
   it(`should return 'true' for the valid email`, () => {
-    expect(validateEmail('test838@gmail.com.'))
-      .toBeTruthy();
+    expect(validateEmail('test838@gmail.com')).toBeTruthy();
+  });
+
+  it(`should return 'true' for email name containing digits only`, () => {
+    expect(validateEmail('838838@gmail.com')).toBeTruthy();
+  });
+
+  it(`should return 'true' for email containing '-', '_' or '.'`, () => {
+    expect(validateEmail('my.new_e-mail@gmail.com')).toBeTruthy();
+  });
+
+  it(`should return 'false' for email with cyrillic letters`, () => {
+    expect(validateEmail('моя_пошта@gmail.com')).toBeFalsy();
   });
 
-  // write more tests here
+  it(`should return 'false' for email beginning with '.'`, () => {
+    expect(validateEmail('.my_e-mail@gmail.com')).toBeFalsy();
+  });
+
+  it(`should return 'false' for domain beginning with '.'`, () => {
+    expect(validateEmail('my_e-mail@.gmail.com')).toBeFalsy();
+  });
+
+  it(`should return 'false' for email containing not allowed chars`, () => {
+    const notAllowedChars = `!$%&'*+/=?^{|}~`.split('');
+
+    notAllowedChars.forEach((char) => {
+      expect(validateEmail(`my${char}e-mail@gmail.com`)).toBeFalsy();
+    });
+  });
+
+  it(`should return 'false' for email without '@'`, () => {
+    expect(validateEmail('my_e-mail_gmail.com')).toBeFalsy();
+  });
 });