Initial version of unittest (#10)

* Initial version of unittest

* Unittest of methods defined in main.py

* Removed the unnecessary dependency on an external file: tf_validate.json.

* Removed the unnecessary dependency on an external file: tf_validate.json.

* Removed the unnecessary dependency on an external file: tf_validate.json.

* Added 'pip install' to workflow

* 'pip install pytest' added

* 'pip install parameterized' added to workflow

* str removeprefix() in main.py is not supprted in Python 3.8

* /tmp does not exist in windows

.github/workflows/unittest.yaml

@@ -0,0 +1,22 @@
+name: Run Tests
+
+on: [push, pull_request]
+
+jobs:
+  unittest:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ubuntu-latest, windows-latest]
+        python: ["3.9", "3.10", "3.11", "3.12"]
+
+    steps:
+      - uses: actions/checkout@v4.1.1
+      - name: Setup Python
+        uses: actions/setup-python@v5.1.0
+        with:
+          python-version: ${{ matrix.python }}
+      - name: Install pytest and parameterized
+        run: pip install pytest parameterized
+      - name: Run test
+        run: python -m unittest test_tf.py

test_tf.py

@@ -0,0 +1,153 @@
+import os
+import subprocess
+import unittest
+import pytest
+from parameterized import parameterized
+from main import get_policy_check_type, get_required_inputs, get_optional_inputs, get_sub_command
+from main import get_treat_findings_as_non_blocking_flag, build_command, execute_command, set_output
+
+from main import CLI_POLICY_VALIDATOR, POLICY_CHECK_TYPE, VALIDATE_POLICY, CHECK_NO_NEW_ACCESS, CHECK_ACCESS_NOT_GRANTED
+from main import COMMON_REQUIRED_INPUTS, TREAT_FINDINGS_AS_NON_BLOCKING
+
+from unittest.mock import patch
+
+INVALID_POLICY_CHECK = "INVALID_POLICY_CHECK"
+
+class TfpvTest(unittest.TestCase):
+    # case 1: test_get_type_ENVIRON_NOT_SET: failure expected because required os.environ[] are not set
+    def test_get_type_ENVIRON_NOT_SET(self):
+        self.assertRaises(KeyError, get_policy_check_type)
+
+    # case 2: test_get_type_INVALID_POLICY_CHECK: failure expected because os.environ[] is set to an invalid value
+    def test_get_type_INVALID_POLICY_CHECK(self):
+        os.environ[POLICY_CHECK_TYPE] = INVALID_POLICY_CHECK
+        self.assertRaises(ValueError, get_policy_check_type)
+
+    # case 3, 4, 5: test_get_type_WITH_VALIDATE_POLICY: success with valid POLICY_CHECK_TYPE
+    @parameterized.expand([VALIDATE_POLICY, CHECK_NO_NEW_ACCESS, CHECK_ACCESS_NOT_GRANTED])
+    def test_get_type_WITH_VALID_POLICY_CHECK(self, policy_check_type):
+        os.environ[POLICY_CHECK_TYPE] = policy_check_type
+        policy_type = get_policy_check_type()
+        self.assertEqual(policy_type, policy_check_type)
+
+    # case 6: test_get_required_input_INVALID_POLICY_CHECK: failure expected because an invalid policy_check_type is provided
+    @unittest.expectedFailure
+    def test_get_required_input_INVALID_POLICY_CHECK(self):
+        policy_check = INVALID_POLICY_CHECK
+        self.assertEqual(get_required_inputs(policy_check), "")
+
+    # case 7, 8, 9: test_get_required_input_WITH_VALIDATE_POLICY: success as a valid POLICY_CHECK_TYPE is provided: VALIDATE_POLICY
+    @parameterized.expand([VALIDATE_POLICY, CHECK_NO_NEW_ACCESS, CHECK_ACCESS_NOT_GRANTED])
+    def test_get_required_input_WITH_VALID_POLICY_CHECK(self, policy_check_type):
+        result = get_required_inputs(policy_check_type)
+        if policy_check_type == VALIDATE_POLICY:
+            self.assertEqual(result, {"INPUT_TEMPLATE-PATH",  "INPUT_REGION"})
+        elif policy_check_type == CHECK_NO_NEW_ACCESS:
+            self.assertEqual(result, {"INPUT_TEMPLATE-PATH",  "INPUT_REGION", "INPUT_REFERENCE-POLICY",  "INPUT_REFERENCE-POLICY-TYPE"})
+        else:
+            self.assertEqual(result, {"INPUT_TEMPLATE-PATH",  "INPUT_REGION", "INPUT_ACTIONS"})
+
+    # case 10: test_get_optional_input_INVALID_POLICY_CHECK: failure expected because an invalid policy_check_type is provided
+    @unittest.expectedFailure
+    def test_get_optional_input_INVALID_POLICY_CHECK(self):
+        policy_check = INVALID_POLICY_CHECK
+        result = get_optional_inputs(policy_check)
+        assertEqual(result, {"INPUT_IGNORE-FINDING",  "INPUT_ALLOW-DYNAMIC-REF-WITHOUT-VERSION",  "INPUT_EXCLUDE-RESOURCE-TYPES"})
+
+    # case 11, 12, 13: test_get_optional_input_WITH_VALID_POLICY_CHECK: success as a valid POLICY_CHECK_TYPE is provided
+    @parameterized.expand([VALIDATE_POLICY, CHECK_NO_NEW_ACCESS, CHECK_ACCESS_NOT_GRANTED])
+    def test_get_optional_input_WITH_VALID_POLICY_CHECK(self, policy_check_type):
+        result = get_optional_inputs(policy_check_type)
+        if policy_check_type == VALIDATE_POLICY:
+            self.assertEqual(result, {"INPUT_ALLOW-EXTERNAL-PRINCIPALS",  "INPUT_TREAT-FINDING-TYPE-AS-BLOCKING", "INPUT_IGNORE-FINDING",
+                          "INPUT_ALLOW-DYNAMIC-REF-WITHOUT-VERSION",  "INPUT_EXCLUDE-RESOURCE-TYPES"})
+        elif policy_check_type == CHECK_NO_NEW_ACCESS:
+            self.assertEqual(result, {"INPUT_IGNORE-FINDING",  "INPUT_ALLOW-DYNAMIC-REF-WITHOUT-VERSION",  "INPUT_EXCLUDE-RESOURCE-TYPES"})
+        else:
+            self.assertEqual(result, {"INPUT_IGNORE-FINDING",  "INPUT_ALLOW-DYNAMIC-REF-WITHOUT-VERSION",  "INPUT_EXCLUDE-RESOURCE-TYPES"})
+
+    # case 14: test_get_sub_command_ENVIRON_NOT_SET: failure expected because required os.environ[]s are not set
+    def test_get_sub_command_ENVIRON_NOT_SET(self):
+        os.environ['INPUT_REGION'] = ''
+        required = ['INPUT_REGION']
+        self.assertRaises(ValueError, get_sub_command, required, True)
+
+    # case 15: test_get_sub_command_MEET_REQUIRED_INPUTS: success as valid inputs are provided.
+    def test_get_sub_command_MEET_REQUIRED_INPUTS(self):
+        tft = os.getcwd() + './main.py'
+        os.environ['INPUT_TEMPLATE-PATH'] = tft
+        os.environ['INPUT_REGION'] = 'us-west-2'
+        required = {"INPUT_TEMPLATE-PATH",  "INPUT_REGION"}
+        expected = ['--template-path', tft, '--region', 'us-west-2']
+        flags = get_sub_command(required, True)
+        self.assertEqual(set(flags), set(expected))
+
+    # case 16: test_get_treat_findings_as_non_blocking_flag_ENVIRON_NOT_SET: failure expected because os.environ[TREAT_FINDINGS_AS_NON_BLOCKING] is not set
+    def test_get_treat_findings_as_non_blocking_flag_ENVIRON_NOT_SET(self):
+        os.environ[TREAT_FINDINGS_AS_NON_BLOCKING] = ''
+        policy_check = CHECK_NO_NEW_ACCESS
+        self.assertRaises(ValueError, get_treat_findings_as_non_blocking_flag, policy_check)
+
+    # case 17: test_get_treat_findings_as_non_blocking_flag_VALIDATE_POLICY: pass
+    def test_get_treat_findings_as_non_blocking_flag_VALIDATE_POLICY(self):
+        policy_check = VALIDATE_POLICY
+        result = get_treat_findings_as_non_blocking_flag(policy_check)
+        self.assertEqual(result, "")
+
+    # case 18: test_get_treat_findings_as_non_blocking_flag_CHECK_ACCESS_NOT_GRANTED_True: pass, a string of flag returned
+    def test_get_treat_findings_as_non_blocking_flag_CHECK_ACCESS_NOT_GRANTED_True(self):
+        policy_check = CHECK_ACCESS_NOT_GRANTED
+        os.environ[TREAT_FINDINGS_AS_NON_BLOCKING] = 'True'
+        result = get_treat_findings_as_non_blocking_flag(policy_check)
+        self.assertEqual(result, ['--treat-findings-as-non-blocking'])
+
+    # case 19: test_get_treat_findings_as_non_blocking_flag_CHECK_ACCESS_NOT_GRANTED_False: pass, an empty string returned
+    def test_get_treat_findings_as_non_blocking_flag_CHECK_ACCESS_NOT_GRANTED_False(self):
+        policy_check = CHECK_ACCESS_NOT_GRANTED
+        os.environ[TREAT_FINDINGS_AS_NON_BLOCKING] = 'False'
+        result = get_treat_findings_as_non_blocking_flag(policy_check)
+        self.assertEqual(result, "")
+
+    # case 20: test_build_command_VALIDATE_POLICY: pass with correct parameters.
+    def test_build_command_VALIDATE_POLICY(self):
+        policy_check = VALIDATE_POLICY
+        tft = os.getcwd() + './main.py'
+        os.environ['INPUT_TEMPLATE-PATH'] = tft 
+        os.environ['INPUT_REGION'] = 'us-west-2'
+        os.environ['TREAT_FINDINGS_AS_NON_BLOCKING'] = 'False'
+        os.environ['INPUT_IGNORE-FINDING'] = 'PASS_ROLE_WITH_STAR_IN_RESOURCE'
+        required = {"INPUT_TEMPLATE-PATH",  "INPUT_REGION"}
+        optional = {"INPUT_IGNORE-FINDING"}
+        command = build_command(policy_check, required, optional)
+        expected = set([CLI_POLICY_VALIDATOR, 'validate', '--template-path', tft, '--region', 'us-west-2', '--ignore-finding', 'PASS_ROLE_WITH_STAR_IN_RESOURCE'])
+        command_set = set(command)
+        self.assertEqual(command_set, expected)
+
+    # case 21: test_execute_command_EXCEPTION: exception raised
+    @patch("subprocess.run", side_effect=Exception("invalid-input"))
+    def test_execute_command_EXCEPTION(self, mock_run):
+        with pytest.raises(Exception) as exc:
+            result = execute_command()
+            assertNotEqual(str(exc.value).find("invalid-input"), -1)
+
+    # case 21: test_execute_command_VALIDATE: pass with mockrun
+    @patch("main.subprocess.run")
+    def test_execute_command_VALIDATE(self, mock_run):
+        command = [CLI_POLICY_VALIDATOR, 'validate']
+        expected = "pass"
+
+        completed_process = subprocess.CompletedProcess(args=['command', 'args'], returncode=0, stdout=expected, stderr=b'error')
+        mock_run.return_value = completed_process
+
+        result = execute_command(command)
+        self.assertEqual(result, expected)
+
+    # case 23: test_set_output: pass
+    def test_set_output_WRITE_TO_FILE(self):
+        os.environ['GITHUB_OUTPUT'] = 'o1'
+        val = '{"BlockingFindings": [],"NonBlockingFindings": []}'
+        set_output(val)
+        res = subprocess.run(["grep", "BlockingFindings", "o1"], check=True, capture_output=True, encoding="utf-8").stdout
+        subprocess.run(["rm", "o1"])
+        self.assertNotEqual(res.find("BlockingFindings"), -1)
+