chore: import upstream snapshot with attribution

haystack/testing/sample_components/greet.py

@@ -0,0 +1,48 @@
+# SPDX-FileCopyrightText: 2022-present deepset GmbH <info@deepset.ai>
+#
+# SPDX-License-Identifier: Apache-2.0
+
+import logging
+
+import haystack.logging as haystack_logging
+from haystack.core.component import component
+
+logger = haystack_logging.getLogger(__name__)
+
+
+@component
+class Greet:
+    """
+    Logs a greeting message without affecting the value passing on the connection.
+    """
+
+    def __init__(
+        self, message: str = "\nGreeting component says: Hi! The value is {value}\n", log_level: str = "INFO"
+    ) -> None:
+        """
+        Class constructor
+
+        :param message: the message to log. Can use `{value}` to embed the value.
+        :param log_level: the level to log at.
+        """
+        if log_level and not getattr(logging, log_level):
+            raise ValueError(f"This log level does not exist: {log_level}")
+        self.message = message
+        self.log_level = log_level
+
+    @component.output_types(value=int)
+    def run(self, value: int, message: str | None = None, log_level: str | None = None):
+        """
+        Logs a greeting message without affecting the value passing on the connection.
+        """
+        if not message:
+            message = self.message
+        if not log_level:
+            log_level = self.log_level
+
+        level = getattr(logging, log_level, None)
+        if not level:
+            raise ValueError(f"This log level does not exist: {log_level}")
+
+        logger.log(level=level, msg=message.format(value=value))
+        return {"value": value}