E81009: invalid file name pattern (typo detected)

What went wrong

A file in the test directory appears to be misnamed. The test runner detected a likely typo using fuzzy matching.

Worked examples

Compilable examples demonstrating this error and the correct fix:

• ek9 -q 953 (How do @Test programs work with command-line arguments...)

Common typos

commandline_args_   -> commandline_arg_   (extra 's')
command_line_arg_   -> commandline_arg_   (extra underscore)
expected_output_case_ -> expected_case_   (wrong format)

How to fix it

Rename the file to match expected pattern:

$ mv dev/commandline_args_test.txt dev/commandline_arg_test.txt

File naming patterns

Simple test:       expected_output.txt
Parameterized:     commandline_arg_{id}.txt + expected_case_{id}.txt

Examples

No compiled example of E81009 is held in the error catalogue yet; the explanation above is the rich message the compiler shows for it (ek9 -h E81009).