E81003: argument count mismatch between program and file

What went wrong

The @Test program declares N parameters, but commandline_arg_{id}.txt provides a different number of arguments (one per line).

Worked examples

Compilable examples demonstrating this error and the correct fix:

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

Example error

A '@Test' program 'MyTest()' that declares two parameters (a String 'label' and an Integer 'count'), with a commandline_arg_basic.txt holding the single line "hello", is this error: one argument where two are expected.

How to fix it

1. Update commandline file to match program's parameter count
2. Or update program's parameter declaration to match args provided

File format

One argument per line. Empty lines are ignored. Order matches parameters.

Examples

Every example is compiled by the EK9 compiler: the first fails exactly as captioned, the others fix it.

Fails with E81003: argument count mismatch between program and file - reported by the test runner, not the compiler, when ek9 -t greeting.ek9 runs in this project.

bad/greeting.ek9

#!ek9
defines module error.e81003.bad

  defines function

    greeting() as pure
      -> name as String
      <- result as String: `Hello, ${name}`

bad/dev/tests.ek9

#!ek9
defines module error.e81003.bad.tests

  references
    error.e81003.bad::greeting

  defines program

    @Test
    GreetingCases()
      ->
        name as String
        times as Integer
      stdout <- Stdout()
      stdout.println(`${greeting(name)} (${times})`)

bad/dev/commandline_arg_simple.txt

EK9

bad/dev/expected_case_simple.txt

Hello, EK9 (3)

$ ek9 -t greeting.ek9
ℹ️ Found 1 test:
  1 assert (unit tests with assertions)

Executing 1 test...

❌ FAIL error.e81003.bad.tests::GreetingCases [Assert] (nms)
    Test configuration error: program expects 2 argument(s), but commandline_arg_simple.txt provides 1

Summary: 0 passed, 1 failed (1 total)
Types: 1 assert
Duration: nms
ek9: tests failed (exit 11)
E81003: argument count mismatch between program and file
  program expects 2 argument(s), but commandline_arg_simple.txt provides 1
  See: ek9 -h E81003

Fixed: commandline_arg_simple.txt holds one line per parameter

good/greeting.ek9

#!ek9
defines module error.e81003.good

  defines function

    greeting() as pure
      -> name as String
      <- result as String: `Hello, ${name}`

good/dev/tests.ek9

#!ek9
defines module error.e81003.good.tests

  references
    error.e81003.good::greeting

  defines program

    @Test
    GreetingCases()
      ->
        name as String
        times as Integer
      stdout <- Stdout()
      stdout.println(`${greeting(name)} (${times})`)

good/dev/commandline_arg_simple.txt

EK9
3

good/dev/expected_case_simple.txt

Hello, EK9 (3)

$ ek9 -t greeting.ek9
ℹ️ Found 1 test:
  1 parameterized (1 cases total)

Executing 1 test...

✅ PASS error.e81003.good.tests::GreetingCases [Param:simple] (nms)

Summary: 1 passed, 0 failed (1 total)
Types: 1 parameterized
Duration: nms