add streaming test template

tests/_test_foo_s.py

@@ -0,0 +1,38 @@
+import os
+import json
+import unittest
+import jc.parsers.foo_s
+
+THIS_DIR = os.path.dirname(os.path.abspath(__file__))
+
+# To create streaming output use:
+# $ cat foo.out | jc --foo-s | jello -c > foo-streaming.json
+
+
+class MyTests(unittest.TestCase):
+
+    def setUp(self):
+        pass
+        # input
+        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/centos-7.7/foo.out'), 'r', encoding='utf-8') as f:
+            self.centos_7_7_foo = f.read()
+
+        # output
+        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/centos-7.7/foo-streaming.json'), 'r', encoding='utf-8') as f:
+            self.centos_7_7_foo_streaming_json = json.loads(f.read())
+
+    def test_foo_s_nodata(self):
+        """
+        Test 'foo' with no data
+        """
+        self.assertEqual(list(jc.parsers.foo_s.parse([], quiet=True)), [])
+
+    def test_foo_s_centos_7_7(self):
+        """
+        Test 'foo' on Centos 7.7
+        """
+        self.assertEqual(list(jc.parsers.foo_s.parse(self.centos_7_7_foo.splitlines(), quiet=True)), self.centos_7_7_foo_streaming_json)
+
+
+if __name__ == '__main__':
+    unittest.main()