Create meta test

Makefile

@@ -14,4 +14,7 @@ bamboo:
 tag:
 	@./setup.py tag
 
-.PHONY: test tag bamboo coverage
+clean:
+	@rm -rf .tox *.egg-info dist .coverage
+
+.PHONY: test tag bamboo coverage clean

README.md

@@ -290,6 +290,26 @@ questions:
         - id: 'id_str1'
 ```
 
+Writing Tests
+-------------
+To validate YAML files when you run your program's tests use Yamale's YamaleTestCase
+
+Example:
+
+```python
+class TestYaml(YamaleTestCase):
+    base_dir = os.path.dirname(os.path.realpath(__file__))
+    schema = 'fixtures/custom_types.yaml'
+    yaml = 'fixtures/custom_types_good.yaml'
+
+    def runTest(self):
+        self.validate()
+```
+
+`base_dir`: the path which is prefixed to other paths
+`schema`: the path to your schema YAML file
+`yaml`: the path or glob to the files you want to validate. Can also be an list of paths and/or globs.
+
 Developers
 ----------
 ### Testing

yamale/__init__.py

@@ -1,3 +1,4 @@
 from .yamale import make_schema, make_data, validate
+from .validator import YamaleTestCase
 
 __version__ = '1.1.4'

yamale/tests/test_meta_test.py

@@ -0,0 +1,20 @@
+import os
+from yamale import YamaleTestCase
+
+
+class TestYaml(YamaleTestCase):
+    base_dir = os.path.dirname(os.path.realpath(__file__))
+    schema = 'fixtures/custom_types.yaml'
+    yaml = 'fixtures/custom_types_good.yaml'
+
+    def runTest(self):
+        self.validate()
+
+
+class TestBadYaml(YamaleTestCase):
+    base_dir = os.path.dirname(os.path.realpath(__file__))
+    schema = 'fixtures/custom_types.yaml'
+    yaml = 'fixtures/custom_types_bad.yaml'
+
+    def runTest(self):
+        self.validate(exception=ValueError)

yamale/validator.py

@@ -0,0 +1,46 @@
+import glob
+import os
+from unittest import TestCase
+
+import yamale
+
+
+class YamaleTestCase(TestCase):
+    schema = None
+    yaml = None
+    base_dir = None
+
+    def validate(self, exception=None):
+        schema = self.schema
+        yaml = self.yaml
+        base_dir = self.base_dir
+
+        if schema is None:
+            return
+
+        if type(yaml) != list:
+            yaml = [yaml]
+
+        if base_dir is not None:
+            schema = os.path.join(base_dir, schema)
+            yaml = [os.path.join(base_dir, y) for y in yaml]
+
+        yamale_schema = yamale.make_schema(schema)
+        datas = self.create_data(yaml)
+
+        if exception is None:
+            self.assertIsNotNone(yamale.validate(yamale_schema, datas))
+        else:
+            self.assertRaises(exception, yamale.validate, yamale_schema, datas)
+
+    def create_data(self, yamls):
+        paths = set()
+        for g in yamls:
+            paths = paths.union(set(glob.glob(g)))
+
+        data = []
+        for d in [yamale.make_data(path) for path in paths]:
+            for c in d:
+                data.append(c)
+
+        return data