add tests for validateEmail.test.js

src/validateEmail.test.js

@@ -8,13 +8,48 @@ describe(`Function 'validateEmail':`, () => {
   });
 
   it(`should return boolean`, () => {
-
+    expect(typeof validateEmail('[email protected]')).toBe('boolean');
   });
 
   it(`should return 'true' for the valid email`, () => {
     expect(validateEmail('[email protected].'))
       .toBeTruthy();
   });
 
-  // write more tests here
+  it(`should return 'false' for an email without '@'`, () => {
+    expect(validateEmail('testmail.com')).toBe(false);
+  });
+
+  it(`should return 'false' for an email with an invalid domain`, () => {
+    expect(validateEmail('test@mail')).toBe(false);
+  });
+
+  it(`should return 'false' for an email starting with a dot`, () => {
+    expect(validateEmail('[email protected]')).toBe(false);
+  });
+
+  it(`should return 'false' for an email ending with a dot`, () => {
+    expect(validateEmail('[email protected]')).toBe(false);
+  });
+
+  it(`should return 'false' for an email with double dots in
+    personal_info`, () => {
+    expect(validateEmail('[email protected]')).toBe(false);
+  });
+
+  it(`should return 'false' for an email with invalid characters in
+    personal_info`, () => {
+    expect(validateEmail('[email protected]')).toBe(false);
+    expect(validateEmail('[email protected]')).toBe(false);
+  });
+
+  it(`should return 'false' for an email with a domain containing
+    invalid characters`, () => {
+    expect(validateEmail('test@mail!.com')).toBe(false);
+  });
+
+  it(`should return 'false' for an email with a domain starting with
+    a hyphen`, () => {
+    expect(validateEmail('[email protected]')).toBe(false);
+  });
 });