Added click unit tests (salesforce#262)

examples/yml/crud-cases/3-wildcard-only-single-actions.yml

@@ -1,4 +1,4 @@
 mode: crud
 wildcard-only:
     single-actions:
-    - secretsmanager:CreateSecret
+    - secretsmanager:ListSecrets

test/command/test_write_policy_click.py

@@ -0,0 +1,57 @@
+import os
+import json
+import unittest
+from click.testing import CliRunner
+from policy_sentry.command.write_policy import write_policy
+from policy_sentry.util.policy_files import get_sid_names_from_policy
+
+test_file_directory = os.path.join(
+    os.path.dirname(__file__),
+    os.path.pardir,
+    os.path.pardir,
+    "examples",
+    "yml"
+)
+
+
+class PolicySentryClickUnitTests(unittest.TestCase):
+    def setUp(self):
+        self.runner = CliRunner()
+
+    def test_write_policy_basic_with_click(self):
+        """command.write_policy: using crud.yml should return exit code 0"""
+        template_file = os.path.join(test_file_directory, "crud.yml")
+        result = self.runner.invoke(write_policy, ["--input-file", template_file])
+        self.assertTrue(result.exit_code == 0)
+
+    def test_click_crud_case_1(self):
+        """write_policy: using 1-ssm-read.yml"""
+        template_file = os.path.join(test_file_directory, "crud-cases", "1-ssm-read.yml")
+        result = self.runner.invoke(write_policy, ["--input-file", template_file])
+        result_json = json.loads(result.output)
+        self.assertListEqual(get_sid_names_from_policy(result_json), ["SsmReadParameter"])
+        self.assertTrue(result.exit_code == 0)
+
+    def test_click_crud_case_2(self):
+        """write_policy: using 2-skip-resource-constraints.yml"""
+        template_file = os.path.join(test_file_directory, "crud-cases", "2-skip-resource-constraints.yml")
+        result = self.runner.invoke(write_policy, ["--input-file", template_file])
+        result_json = json.loads(result.output)
+        self.assertListEqual(get_sid_names_from_policy(result_json), ["SkipResourceConstraints"])
+        self.assertTrue(result.exit_code == 0)
+
+    def test_click_crud_case_3(self):
+        """write_policy: using 3-wildcard-only-single-actions.yml"""
+        template_file = os.path.join(test_file_directory, "crud-cases", "3-wildcard-only-single-actions.yml")
+        result = self.runner.invoke(write_policy, ["--input-file", template_file])
+        result_json = json.loads(result.output)
+        self.assertListEqual(get_sid_names_from_policy(result_json), ["MultMultNone"])
+        self.assertTrue(result.exit_code == 0)
+
+    def test_click_crud_case_4(self):
+        """write_policy: using 4-wildcard-only-bulk-selection.yml"""
+        template_file = os.path.join(test_file_directory, "crud-cases", "4-wildcard-only-bulk-selection.yml")
+        result = self.runner.invoke(write_policy, ["--input-file", template_file])
+        result_json = json.loads(result.output)
+        self.assertListEqual(get_sid_names_from_policy(result_json), ["MultMultNone"])
+        self.assertTrue(result.exit_code == 0)