fix - testing JSON schemas

tests/schemas/test_elx_schemas.py

 from unittest import TestCase
 from json import loads
 from jsonschema import validate
+from jsonschema.exceptions import SchemaError
 import os
 
+# Fixtures
+dirname = os.path.dirname(__file__)
+testdata_dir = os.path.abspath(os.path.join(dirname, "data/"))
+schema_dir = os.path.abspath(os.path.join(dirname,"../../metadata_tools/resources/"))
+schema_testdata_filename_map = [
+    ('elu-dataset.json', 'datasets.json'),
+    ('elu-project.json', 'projects.json'),
+    ('elu-institution.json', 'partners.json')
+    ]
 
-class TestParser(TestCase):
 
 
+class TestJSONSchemas(TestCase):
 
     def test_validation(self):
-
-        print(os.getcwd())
-        schemaFile = open('../../metadata_tools/resources/elu-dataset.json', encoding='utf-8')
-        dataFile = open('data/datasets.json', encoding='utf-8')
-
-        schema = loads(schemaFile.read())
-        data = loads(dataFile.read())
-
-        try:
-            validate(data, schema['schema'])
-            self.assert_(True)
-        except:
-            self.fail()
-        finally:
-            dataFile.close()
-            schemaFile.close()
-
-
+        for schema_filename, dataset_filename in schema_testdata_filename_map:
+            schema_filepath = os.path.abspath(os.path.join(schema_dir, schema_filename))
+            schemaFile = open(os.path.join(schema_dir, schema_filename), encoding='utf-8')
+
+            data_filepath = os.path.abspath(os.path.join(testdata_dir, dataset_filename))
+            dataFile = open(data_filepath, encoding='utf-8')
+
+            schema = loads(schemaFile.read())
+            data = loads(dataFile.read())['items']
+
+            for item in data:
+                try:
+                    validate(item, schema)
+                    self.assert_(True)
+                except SchemaError:
+                   self.fail(f"JSONSchema {schema_filepath} is not valid - SchemaError.")
+                except:
+                    self.fail(f"JSONSchema {schema_filepath} is not valid - failed on test data {data_filepath}")
+                finally:
+                    dataFile.close()
+                    schemaFile.close()