Add tests for some validators

tests/forms/test_validators.py

@@ -0,0 +1,61 @@
+from wtforms.validators import ValidationError
+import pytest
+
+from atst.forms.validators import Alphabet, IsNumber, PhoneNumber
+
+
+class TestIsNumber:
+
+    @pytest.mark.parametrize("valid", ["0", "12", "-12"])
+    def test_IsNumber_accepts_integers(self, valid, dummy_form, dummy_field):
+        validator = IsNumber()
+        dummy_field.data = valid
+        validator(dummy_form, dummy_field)
+
+    @pytest.mark.parametrize("invalid", ["12.1", "two", ""])
+    def test_IsNumber_rejects_anything_else(self, invalid, dummy_form, dummy_field):
+        validator = IsNumber()
+        dummy_field.data = invalid
+        with pytest.raises(ValidationError):
+            validator(dummy_form, dummy_field)
+
+
+class TestPhoneNumber:
+
+    @pytest.mark.parametrize("valid", [
+        "12345",
+        "1234567890",
+        "(123) 456-7890",
+    ])
+    def test_PhoneNumber_accepts_valid_numbers(self, valid, dummy_form, dummy_field):
+        validator = PhoneNumber()
+        dummy_field.data = valid
+        validator(dummy_form, dummy_field)
+
+    @pytest.mark.parametrize("invalid", [
+        "1234",
+        "123456",
+        "1234567abc",
+        "(123) 456-789012",
+    ])
+    def test_PhoneNumber_rejects_invalid_numbers(self, invalid, dummy_form, dummy_field):
+        validator = PhoneNumber()
+        dummy_field.data = invalid
+        with pytest.raises(ValidationError):
+            validator(dummy_form, dummy_field)
+
+
+class TestAlphabet:
+
+    @pytest.mark.parametrize("valid", ["a", "abcde"])
+    def test_Alphabet_accepts_letters(self, valid, dummy_form, dummy_field):
+        validator = Alphabet()
+        dummy_field.data = valid
+        validator(dummy_form, dummy_field)
+
+    @pytest.mark.parametrize("invalid", ["", "hi mark", "cloud9"])
+    def test_Alphabet_rejects_non_letters(self, invalid, dummy_form, dummy_field):
+        validator = Alphabet()
+        dummy_field.data = invalid
+        with pytest.raises(ValidationError):
+            validator(dummy_form, dummy_field)