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How to use serialized_replacements method in localstack

Best Python code snippet using localstack_python

transformer.py

Source:transformer.py

...17        self.replacements = []18        self.scoped_tokens = {}19        self._cache = {}20    @property21    def serialized_replacements(self) -> list[GlobalReplacementFn]:  # TODO: naming22        return self.replacements23    def register_serialized_replacement(self, fn: GlobalReplacementFn):  # TODO: naming24        self.replacements.append(fn)25    def new_scope(self, scope: str) -> int:26        """retrieve new enumeration value for a given scope key (e.g. for tokens such as <fn-name:1>"""27        current_counter = self.scoped_tokens.setdefault(scope, 1)28        self.scoped_tokens[scope] += 129        return current_counter30def _register_serialized_reference_replacement(31    transform_context: TransformContext, *, reference_value: str, replacement: str32):33    if '"' in reference_value:34        reference_value = reference_value.replace('"', '\\"')35    cache = transform_context._cache.setdefault("regexcache", set())...

test_transformer.py

Source:test_transformer.py

1import copy2import json3import pytest4from localstack.testing.snapshots.transformer import TransformContext5from localstack.testing.snapshots.transformer_utility import TransformerUtility6class TestTransformer:7    def test_key_value_replacement(self):8        input = {9            "hello": "world",10            "hello2": "again",11            "path": {"to": {"anotherkey": "hi", "inside": {"hello": "inside"}}},12        }13        key_value = TransformerUtility.key_value(14            "hello", "placeholder", reference_replacement=False15        )16        expected_key_value = {17            "hello": "placeholder",18            "hello2": "again",19            "path": {"to": {"anotherkey": "hi", "inside": {"hello": "placeholder"}}},20        }21        copied = copy.deepcopy(input)22        ctx = TransformContext()23        assert key_value.transform(copied, ctx=ctx) == expected_key_value24        assert ctx.serialized_replacements == []25        copied = copy.deepcopy(input)26        key_value = TransformerUtility.key_value("hello", "placeholder", reference_replacement=True)27        expected_key_value_reference = {28            "hello": "<placeholder:1>",29            "hello2": "again",30            "path": {"to": {"anotherkey": "hi", "<placeholder:2>": {"hello": "<placeholder:2>"}}},31        }32        assert key_value.transform(copied, ctx=ctx) == copied33        assert len(ctx.serialized_replacements) == 234        tmp = json.dumps(copied, default=str)35        for sr in ctx.serialized_replacements:36            tmp = sr(tmp)37        assert json.loads(tmp) == expected_key_value_reference38    @pytest.mark.parametrize("type", ["key_value", "jsonpath"])39    def test_replacement_with_reference(self, type):40        input = {41            "also-me": "b",42            "path": {43                "to": {"anotherkey": "hi", "test": {"hello": "replaceme"}},44                "another": {"key": "this/replaceme/hello"},45            },46            "b": {"a/b/replaceme.again": "bb"},47            "test": {"inside": {"path": {"to": {"test": {"hello": "also-me"}}}}},48        }49        expected = {50            "<MYVALUE:2>": "b",51            "path": {52                "to": {"anotherkey": "hi", "test": {"hello": "<MYVALUE:1>"}},53                "another": {"key": "this/<MYVALUE:1>/hello"},54            },55            "b": {"a/b/<MYVALUE:1>.again": "bb"},56            "test": {"inside": {"path": {"to": {"test": {"hello": "<MYVALUE:2>"}}}}},57        }58        replacement = "MYVALUE"59        if type == "key_value":60            transformer = TransformerUtility.key_value(61                "hello", replacement, reference_replacement=True62            )63        else:64            transformer = TransformerUtility.jsonpath(65                "$..path.to.test.hello", replacement, reference_replacement=True66            )67        copied = copy.deepcopy(input)68        ctx = TransformContext()69        assert transformer.transform(copied, ctx=ctx) == copied70        assert len(ctx.serialized_replacements) == 271        tmp = json.dumps(copied, default=str)72        for sr in ctx.serialized_replacements:73            tmp = sr(tmp)74        assert json.loads(tmp) == expected75    def test_regex(self):76        input = {77            "hello": "world",78            "hello2": "again",79            "path": {"to": {"anotherkey": "hi", "inside": {"hello": "inside"}}},80        }81        expected = {82            "new-value": "world",83            "new-value2": "again",84            "path": {"to": {"anotherkey": "hi", "inside": {"new-value": "inside"}}},85        }86        transformer = TransformerUtility.regex("hello", "new-value")87        ctx = TransformContext()88        output = transformer.transform(json.dumps(input), ctx=ctx)89        for sr in ctx.serialized_replacements:90            output = sr(output)91        assert json.loads(output) == expected92    def test_log_stream_name(self):93        input = {94            "Payload": {95                "context": {96                    "functionVersion": "$LATEST",97                    "functionName": "my-function",98                    "memoryLimitInMB": "128",99                    "logGroupName": "/aws/lambda/my-function",100                    "logStreamName": "2022/05/31/[$LATEST]ced3cafaaf284d8199e02909ac87e2f5",101                    "clientContext": {102                        "custom": {"foo": "bar"},103                        "client": {"snap": ["crackle", "pop"]},104                        "env": {"fizz": "buzz"},105                    },106                    "invokedFunctionArn": "arn:aws:lambda:us-east-1:111111111111:function:my-function",107                }108            }109        }110        transformers = TransformerUtility.lambda_api()111        ctx = TransformContext()112        for t in transformers:113            t.transform(input, ctx=ctx)114        output = json.dumps(input)115        for sr in ctx.serialized_replacements:116            output = sr(output)117        expected = {118            "Payload": {119                "context": {120                    "functionVersion": "$LATEST",121                    "functionName": "<resource:1>",122                    "memoryLimitInMB": "128",123                    "logGroupName": "/aws/lambda/<resource:1>",124                    "logStreamName": "<log-stream-name:1>",125                    "clientContext": {126                        "custom": {"foo": "bar"},127                        "client": {"snap": ["crackle", "pop"]},128                        "env": {"fizz": "buzz"},129                    },130                    "invokedFunctionArn": "arn:aws:lambda:us-east-1:111111111111:function:<resource:1>",131                }132            }133        }...

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