Create unitests for creating_full_email function.

The minimum email length is checked. Local part minimum 2 characters + "@ mailinator.com" (15 characters) = 17 characters.
Check for maximum length (254 characters).
Check if there is a domain name.
Check whether there is a "com."
Check for the number of characters "@".
Check if there is a ". @".
Check if the first character is a letter. extsoft#47
In code_assesment.sh was added py.test for runing unitests.
In README.md was added information about py.test.

README.md

@@ -76,7 +76,8 @@ We use some tools to guarantee the quality of the code.
 3. [flake8](http://flake8.pycqa.org/en/latest/) applies some style checks on the code.
 4. [pydocstyle](http://www.pydocstyle.org/en/stable/) analyses the quality of docstrings
 (executed via `flake8`).
-5. [Mypy](https://mypy.readthedocs.io/en/latest/) checks static types. 
+5. [Mypy](https://mypy.readthedocs.io/en/latest/) checks static types.
+6. [py.test](https://docs.pytest.org) runs unittests. 
 
 In order to run code assessment, you need to run `./code-assessment.sh` command and make sure
 that there is no message like **_Code assessment is failed! Please fix errors!!!_**. If you face

code-assessment.sh

@@ -10,7 +10,7 @@ black --check . || add_fail black
 pylint oct suite.py || add_fail pylint
 flake8 oct suite.py || add_fail flake8
 mypy oct suite.py || add_fail mypy
-
+py.test -v tests || add_fail py.test
 if [[ ${#FAILURES[@]} -ne 0 ]]; then
     cat <<RESULT
 

tests/test_emailsGeneration.py

@@ -0,0 +1,55 @@
+import pytest
+import re
+from oct.tests.web.creating_emails import EmailsGeneration
+
+
+class TestEmailsGeneration:
+    @pytest.fixture(scope="function", autouse=True)
+    def setup(self) -> None:
+        self.email = EmailsGeneration().creating_full_email()
+
+    def test_length_more_then_17(self) -> None:
+        assert len(self.email) > 17
+
+    def test_length_less_then_254(self) -> None:
+        assert len(self.email) < 254
+
+    def test_find_domain_name(self) -> None:
+        assert "@mailinator.com" in self.email
+
+    def test_absence_dot_dog(self) -> None:
+        assert ".@" not in self.email
+
+    def test_one_at_character(self) -> None:
+        dog_counter = 0
+        for iterator in self.email:
+            if iterator == "@":
+                dog_counter += 1
+        assert dog_counter == 1
+
+    def test_absence_com_dot(self) -> None:
+        assert "com." not in self.email
+
+    def test_first_symbol_isalpha(self) -> None:
+        assert self.email[0].isalpha()
+
+    def test_creating_emails_is_string(self) -> None:
+        assert isinstance(EmailsGeneration().creating_full_email(), str)
+
+    def test_emails_pattern(self) -> None:
+        random_email = EmailsGeneration().creating_full_email()
+        assert random_email == ((re.findall(r"\w{1,7}@\w+.\w+", random_email)).pop(0))
+
+    def test_email_contains_dog(self) -> None:
+        assert (EmailsGeneration().creating_full_email().count("@")) == 1
+
+    def test_length_first_part_of_email(self) -> None:
+        assert len((EmailsGeneration().creating_full_email().split("@")).pop(0)) == 7
+
+    def test_second_part_of_email(self) -> None:
+        assert len((EmailsGeneration().creating_full_email().split(".")).pop(1)) <= 4
+
+    def test_special_symbols_are_absent(self) -> None:
+        special_symbols = list(str("!$#%^&*()+=?/," "№;:?*[]{}|"))
+        for each_symbol in special_symbols:
+            assert each_symbol is not EmailsGeneration().creating_full_email()