Pipping echo command prints to output

[Aledosim]

Hello!

I wrote this example, I think it's self explanatory

% LOG_FILE: ./test

remove_logs() {
    rm $LOG_FILE
}

Context 'log'
    AfterEach 'remove_logs'
    File log_file="$LOG_FILE"

    It 'should log a message to file'
        When run command echo 'test message' >> "$LOG_FILE"

        The file log_file should be a file
        The file log_file should not be a empty file
        The file log_file should be readable
        The length of output should equal 0
    End
End

The result I got:

Randomized with seed 93493
Running: /bin/bash [bash 5.0.3(1)-release] {--random examples}
F

Examples:
  1) log should log a message to file
     When run command echo test message

     1.1) The file log_file should not be a empty file

            The specified path is empty file
            path: ./test

          # spec/test_spec.sh:259

     1.2) The length of output should equal 0

            expected: 0
                 got: 12

          # spec/test_spec.sh:261

Finished in 0.12 seconds (user 0.12 seconds, sys 0.03 seconds)
1 example, 1 failure


Failure examples / Errors: (Listed here affect your suite's status)

shellspec spec/test_spec.sh:255 # 1) log should log a message to file FAILED

Using Dump I found out that the echo command is printed to output. I expected a success, is this a bug or I'm doing it wrong?

[JConan]

I don't think evaluation line "When" can resolve redirection.
You can otherwise encapsuled this in a function and then call it.

LOG_FILE="$SHELLSPEC_TMPDIR/test"

remove_logs() {
    rm "$LOG_FILE"
}

Context 'log'
    AfterEach 'remove_logs'
    File log_file="$LOG_FILE"
    log_to_file(){
      echo 'test message' >> "$LOG_FILE"
    }


    It 'should log a message to file'
        When call echo 'toto' >> "$LOG_FILE"

        The file log_file should be a file
        The file log_file should not be a empty file
        The file log_file should be readable
        The length of output should equal 0
    End
End

[alexandredosim]

Hello JConan!
Thanks for your reply. After some study I came to a passing answer of the same type of yours. Pasting the full test here:

# Constants accessed from functions
% DATE_STR: dom 26 mar 2023 22:38:45
% LOG_DIR: .
% LOG_PATH: "$LOG_DIR/$DATE_STR test_env_builder.log"
#######################################

Mock date
    if [ ! -e "$date_lock" ]; then
        echo $DATE_STR
        touch "$date_lock"
    else
        echo dom 26 mar 2023 22:38:46
    fi
End
export "DATE_STR"

Context 'log'
    Include $script_file

    Context 'usage: caller'

        It 'should redirect the stdout to the file setted by log'

            usage() {
                log
                echo 'test message' &>> "$LOG_FILE"
            }

            When call usage

            The file "$LOG_PATH" should be a file
            The file "$LOG_PATH" should not be a empty file
            The file "$LOG_PATH" should be readable

            The output should equal "" 
        End
    End

    It 'should set the log file with the right format'
        When call log

        The variable "LOG_FILE" should equal "$LOG_PATH"
    End

    It 'should set the log file path one time only'
        log_twice() {
            log
            log
        }

        When call log_twice

        The variable "LOG_FILE" should equal "$LOG_PATH"
    End
End