Update dbt-metricflow package tests to check logging to the log file

scripts/ci_tests/dbt_metricflow_package_test.py

@@ -5,6 +5,8 @@
 from pathlib import Path
 from typing import Optional
 
+from dbt_metricflow.cli.cli_configuration import CLIConfiguration
+
 
 def _run_shell_command(command: str, cwd: Optional[Path] = None) -> None:
     if cwd is None:
@@ -37,3 +39,16 @@ def _run_shell_command(command: str, cwd: Optional[Path] = None) -> None:
         "mf query --metrics transactions --group-by metric_time --order metric_time",
         cwd=tutorial_directory,
     )
+
+    # Check that log messages are written as spected to the log file.
+    log_file_path = tutorial_directory.joinpath("logs", CLIConfiguration.LOG_FILE_NAME)
+    assert log_file_path.exists(), f"Log file not present at expected location: {str(log_file_path)}"
+
+    with open(tutorial_directory.joinpath("logs", CLIConfiguration.LOG_FILE_NAME)) as fp:
+        log_file_contents = fp.read()
+
+    assert CLIConfiguration.LOG_FILE_NAME in log_file_contents, (
+        f"Log file ({log_file_path}) is missing message indicating logging has been set up."
+        f"\nLog file contents:"
+        f"\n{textwrap.indent(log_file_contents, prefix='  ')}"
+    )