feat(`forge test`) add an optional `--json-file` argument to write both to `stdout` and to a JSON file

[adhusson]

Component

Forge

Describe the feature you would like

When running tests in a CI, it is useful to both show the human-readable output on stdout and write a JSON file to be processed at later stages by the CI.

Right now, the only way to output both is either 1) to run forge test twice, or 2) to run forge test --json | myProcessingTool, where myProcessingTool writes a JSON file and format the JSON back to human-readable output.

With forge test --json-file path/to/file you would get both outputs.

[onbjerg]

What would you use the JSON output for? Out of curiosity.

[adhusson]

Parse and format for the CI, create test summaries (e.g. this from test-reporter).

[mattsse]

I think you can get print+pipe with tee

[adhusson]

Thanks, yes it would help to print either text or JSON both on stdout and a file, but to get text to stdout + JSON to a file I think you need something like a --json-file argument.

[mattsse]

this is, unfortunately, a bit unambiguous because then we can't really write to file OR print to stdout

you can print and write with --json | tee out.json

[0xYYY]

I think what OP want is to have the stdout of forge test, but at the same time, save the output of forge test --json to a file.

To implement that, we could save the output of serialized results to a file here and here if the --json-file flag is supplied?

[ByteAtATime]

Hey, what is the status on this? I also need the feature for my project, to have a script that outputs the original stdout (human-readable) for the user but also get the json data for processing.