add hash tests

tests/fixtures/centos-7.7/hash.json

@@ -0,0 +1 @@
+[{"hits": 3, "command": "/usr/bin/sum"}, {"hits": 2, "command": "/usr/bin/cat"}, {"hits": 2, "command": "/usr/bin/cksum"}]

tests/fixtures/centos-7.7/hash.out

@@ -0,0 +1,4 @@
+hits	command
+   3	/usr/bin/sum
+   2	/usr/bin/cat
+   2	/usr/bin/cksum

tests/test_hash.py

@@ -0,0 +1,34 @@
+import os
+import unittest
+import json
+import jc.parsers.hash
+
+THIS_DIR = os.path.dirname(os.path.abspath(__file__))
+
+
+class MyTests(unittest.TestCase):
+
+    def setUp(self):
+        # input
+        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/centos-7.7/hash.out'), 'r', encoding='utf-8') as f:
+            self.centos_7_7_hash = f.read()
+
+        # output
+        with open(os.path.join(THIS_DIR, os.pardir, 'tests/fixtures/centos-7.7/hash.json'), 'r', encoding='utf-8') as f:
+            self.centos_7_7_hash_json = json.loads(f.read())
+
+    def test_hash_nodata(self):
+        """
+        Test 'hash' parser with no data
+        """
+        self.assertEqual(jc.parsers.hash.parse('', quiet=True), [])
+
+    def test_hash_centos_7_7(self):
+        """
+        Test 'hash' on Centos 7.7
+        """
+        self.assertEqual(jc.parsers.hash.parse(self.centos_7_7_hash, quiet=True), self.centos_7_7_hash_json)
+
+
+if __name__ == '__main__':
+    unittest.main()