Add unit tests for config retrieval (#40)

.gitignore

@@ -18,4 +18,8 @@ TODO.md
 spot/benchmarks/*/workload.json
 
 spot-env/
-dump/
+
+#Unittest Logs
+.coverage
+
+dump/

tests/config_tests/sample_function_configuration.json

@@ -0,0 +1,82 @@
+{
+    "FunctionName": "string",
+    "FunctionArn": "string",
+    "Runtime": "python3.8",
+    "Role": "string",
+    "Handler": "string",
+    "CodeSize": 123,
+    "Description": "string",
+    "Timeout": 123,
+    "MemorySize": 123,
+    "LastModified": "2022-02-09T21:58:22.000+0000",
+    "CodeSha256": "string",
+    "Version": "string",
+    "VpcConfig": {
+        "SubnetIds": [
+            "string"
+        ],
+        "SecurityGroupIds": [
+            "string"
+        ],
+        "VpcId": "string"
+    },
+    "DeadLetterConfig": {
+        "TargetArn": "string"
+    },
+    "Environment": {
+        "Variables": {
+            "string": "string"
+        },
+        "Error": {
+            "ErrorCode": "string",
+            "Message": "string"
+        }
+    },
+    "KMSKeyArn": "string",
+    "TracingConfig": {
+        "Mode": "Active"
+    },
+    "MasterArn": "string",
+    "RevisionId": "string",
+    "Layers": [
+        {
+            "Arn": "string",
+            "CodeSize": 123,
+            "SigningProfileVersionArn": "string",
+            "SigningJobArn": "string"
+        }
+    ],
+    "State": "Active",
+    "StateReason": "string",
+    "StateReasonCode": "Idle",
+    "LastUpdateStatus": "Successful",
+    "LastUpdateStatusReason": "string",
+    "LastUpdateStatusReasonCode": "EniLimitExceeded",
+    "FileSystemConfigs": [
+        {
+            "Arn": "string",
+            "LocalMountPath": "string"
+        }
+    ],
+    "PackageType": "Zip",
+    "ImageConfigResponse": {
+        "ImageConfig": {
+            "EntryPoint": [
+                "string"
+            ],
+            "Command": [
+                "string"
+            ],
+            "WorkingDirectory": "string"
+        },
+        "Error": {
+            "ErrorCode": "string",
+            "Message": "string"
+        }
+    },
+    "SigningProfileVersionArn": "string",
+    "SigningJobArn": "string",
+    "Architectures": [
+        "x86_64"
+    ]
+}

tests/config_tests/test_config_retriever.py

@@ -0,0 +1,58 @@
+import unittest
+import json
+from unittest.mock import patch, call
+import datetime
+
+import spot
+from spot.configs.aws_config_retriever import AWSConfigRetriever
+from spot.db.db import DBClient
+
+
+class TestConfigRetrieval(unittest.TestCase):
+    def setUp(self) -> None:
+        self.function = "AWSHelloWorld"
+        self.timestamp = 0
+        self.configRetriever = AWSConfigRetriever(self.function, "localhost", 27017)
+
+    @patch.object(
+        spot.configs.aws_config_retriever.DBClient, "add_new_config_if_changed"
+    )
+    @patch("spot.configs.aws_config_retriever.boto3")
+    def test_get_latest_config(self, mockBoto3, mockDBClient):
+        sample_config = []
+        with open("tests/config_tests/sample_function_configuration.json") as f:
+            sample_config = json.load(f)
+            mockBoto3.client(
+                "lambda"
+            ).get_function_configuration.return_value = sample_config
+            self.configRetriever.get_latest_config()
+
+            # assert a database call has been made with function add_new_config_if_changed with appropriate variables
+            date = datetime.datetime.strptime(
+                sample_config["LastModified"], "%Y-%m-%dT%H:%M:%S.%f+0000"
+            )
+            timestamp = str(
+                (date - datetime.datetime(1970, 1, 1)).total_seconds() * 1000
+            )
+            sample_config["LastModifiedInMs"] = int(timestamp[:-2])
+            sample_config["Architectures"] = sample_config["Architectures"][0]
+            callTemp = call(self.function, "config", sample_config)
+            mockDBClient.assert_has_calls([callTemp])
+
+    @patch.object(
+        spot.configs.aws_config_retriever.DBClient, "get_all_collection_documents"
+    )
+    def test_print_configs(self, mockDBClient):
+        sample_config = []
+        with open("tests/config_tests/sample_function_configuration.json") as f:
+            sample_config = json.load(f)
+            mockDBClient.get_all_collection_documents.return_value = [sample_config]
+            self.configRetriever.print_configs()
+
+            # assert a database call to get_all_collection_documents has been made with proper variables
+            callTemp = call(self.function, "config")
+            mockDBClient.assert_has_calls([callTemp])
+
+
+if __name__ == "__main__":
+    unittest.main()