Add repr method and several tests (#5)

* Add representation of TrafaretValidator

* Add smoke tests

setup.py

@@ -39,4 +39,6 @@ def read(fname):
       url='https://github.com/Lex0ne/trafaret_validator',
       packages=["trafaret_validator"],
       install_requires=['trafaret'],
-      include_package_data=True,)
+      test_suite='tests',
+      include_package_data=True,
+)

tests/test_smoke.py

@@ -0,0 +1,26 @@
+from unittest import TestCase
+
+import trafaret as t
+
+from trafaret_validator import TrafaretValidator
+
+
+class ValidatorForTest(TrafaretValidator):
+    d = t.Int()
+
+
+class TestTrafaretValidator(TestCase):
+
+    def test_valid(self):
+        data = {'d': 1}
+        vld_good = ValidatorForTest(**data)
+        self.assertTrue(vld_good.validate())
+        self.assertEqual(data, vld_good.data)
+        self.assertEqual({}, vld_good.errors)
+
+    def test_invalid(self):
+        data = {'d': 'asdasdasd'}
+        vld_good = ValidatorForTest(**data)
+        self.assertFalse(vld_good.validate())
+        self.assertEqual({}, vld_good.data)
+        self.assertIn('d', vld_good.errors)

trafaret_validator/validator.py

@@ -90,3 +90,13 @@ def validate(self):
         except t.DataError as error:
             self._errors = error.as_dict()
             return False
+
+    def __repr__(self):
+        return '<TrafaretValidator ' \
+               'is-data-valid={validation_result} ' \
+               'data={data} ' \
+               'errors={errors}>'.format(
+            validation_result=self.validate(),
+            data=self._data,
+            errors=self._errors,
+        )