Unit testing a function that reads from stdin

[saladuit]

So I've created the following function that is being called in a loop. I'm not sure how to properly test it. Preferably I'd like to give readline two separate commands: 1. "ls" 2. "exit". This would issue the command once and then exit the loop. As a bonus I'd also like to compare the result of the "ls" command but that's only optional. Does anyone have any ideas how I could achieve this using criterion?

int32_t minishell_loop(t_minishell *sheldon)
{
    sheldon->command_line = readline(PROMPT);
    if (!sheldon->command_line && printf("\x1B[1A" PROMPT "exit\n"))
        return (STOP);
    if (!*sheldon->command_line)
    {
        free(sheldon->command_line);
        return (CONTINUE);
    }
    add_history(sheldon->command_line);
    sheldon->tokens = lexer(sheldon->command_line, &sheldon->exit_status);
    if (!sheldon->tokens)
        return (minishell_clean(sheldon));
    sheldon->ast = parser(sheldon->tokens);
    if (!sheldon->ast)
        return (minishell_clean(sheldon));
    sheldon->exit_status = executor(sheldon);
        return (minishell_clean(sheldon));
}

void redirect_stdfds(void)
{
    cr_redirect_stdin();
    cr_redirect_stdout();
}

Test(minishell_loop, test_ls_exit, .timeout=1, .init=redirect_stdfds) {
    char *commands[] = {"exit\n\0", NULL};
    char *envp[] = {"HALLO=hello", NULL};

    FILE *file = cr_get_redirected_stdin();
    fputs(*commands, file);
    // Run the loop
    int result = minishell(envp);
    cr_assert_eq(result, STOP);
    cr_assert_stdout_eq_str("xit\n");
    fflush(file);
    fclose(file);
}

Executing this produces the following output:

make test; ./test.out --filter 'minishell_loop/*'

isatty: Inappropriate ioctl for device

[====] Synthesis: Tested: 1 | Passing: 1 | Failing: 0 | Crashing: 0

Running:

./minishell.out
minishell$ exit

Prints on the stdout:

Sheldon$ exit
So this test should fail

[saladuit]

I'm still stuck. The following code snippit still produces the following output. What am I doing wrong?

[ERR ] command_line: (null)
Sheldon$ [FAIL] minishell_loop::test_ls_exit: Timed out. (1.00s)
[====] Synthesis: Tested: 1 | Passing: 0 | Failing: 1 | Crashing: 0 

Test(minishell_loop, test_ls_exit, .timeout=1/*  .init=redirect_stdfds */) {
    char *commands[] = {"exit\0", NULL};
    char *envp[] = {"HALLO=hello", NULL};
    t_minishell sheldon;

	ft_bzero(&sheldon, sizeof(t_minishell));
	sheldon.exit_status = envp_load(&sheldon.envd, envp);

    rl_instream = cr_get_redirected_stdin();
    fwrite(*commands, sizeof(char), strlen(*commands), rl_instream);
    rewind(rl_instream);
    cr_log_error("command_line: %s", sheldon.command_line);

    int result = minishell_loop(&sheldon);

    cr_log_error("command_line: %s", sheldon.command_line);
    cr_assert_eq(result, STOP);
    cr_assert_stdout_eq_str("xit\n");
    fflush(rl_instream);
    fclose(rl_instream);
}

[saladuit]

So after a LOT of trying. I've dumbed down everything to the following:
The test case

Test(minishell_loop, test_ls_exit) 
{
    t_minishell sheldon;

	ft_bzero(&sheldon, sizeof(t_minishell));
	sheldon.command_line = ft_strdup("ls");
    minishell_loop(&sheldon);
}

I check whether sheldon->command_line exists. which saves the pain of redirection stuff and so forth.
However, if I don't uncomment the executor, my program hangs.
It probably has something to do with #383, but I'm not completely sure.

int32_t	minishell_loop(t_minishell *sheldon)
{
	if (!sheldon->command_line)
		sheldon->command_line = readline(PROMPT);
	if (!sheldon->command_line && printf("\x1B[1A" PROMPT "exit\n"))
		return (STOP);
	if (!*sheldon->command_line)
	{
		free(sheldon->command_line);
		return (CONTINUE);
	}
	add_history(sheldon->command_line);
	sheldon->tokens = lexer(sheldon->command_line, &sheldon->exit_status);
	if (!sheldon->tokens)
		return (minishell_clean(sheldon));
	sheldon->ast = parser(sheldon->tokens);
	if (!sheldon->ast)
		return (minishell_clean(sheldon));
	// sheldon->exit_status = executor(sheldon);
	return (minishell_clean(sheldon));
}

This 'works' as it successfully prints the whole ast shown below:

✦ ~/repos/minishell increase_coverage📈* ⇡ ❯ ./test.out --filter 'minishell_loop/*'

Command_table #1 at 0x55e58678f490
        Command #1 at 0x55e58678f490
                Argument #1: ls
[====] Synthesis: Tested: 1 | Passing: 1 | Failing: 0 | Crashing: 0 

If I uncomment sheldon->exit_status = executor(sheldon);

I get the following output:

Command_table #1 at 0x561aa47ce490
        Command #1 at 0x561aa47ce490
                Argument #1: ls
[ERR ] Received message identified by a PID '468695' that is not a child process.

[saladuit]

What I really hate is that this line doesnt work:

if (!sheldon->command_line)
		sheldon->command_line = readline(PROMPT);

I really don't mind not testing readline and just using strdup, but for some reason it hangs @Snaipe

[Snaipe]

Well, there's a few things that make unit-testing readline() impractical, but besides that, I think I'd expect this to work.

What is your executor function doing? From the error message above, it looks like it's trying to call some criterion function after forking; that is definitely not possible, as the PID is used to identify which test is sending the message.

Going back to your initial test, you can't really rewind the redirected stdin, because it's a pipe. I'm not sure the buffering on it is also line-based, so you'd need to call fflush(rl_instream); before calling your minishell_loop.

[saladuit]

it is roughly doing this in the case that it only accepts one command like ls:

int32_t	execute_simple_command(t_command *cmd, t_minishell *shell)
{
	pid_t		pid;
	int32_t		status;
	char		**arguments;

	arguments = get_arguments(cmd);
	setup_redirects(cmd);
	free(cmd);
	status = execute_builtin(arguments, shell);
	if (status >= 0)
		return (status);
	pid = fork();
	if (pid != 0)
		return (wait_for_child_processes(pid));
	reset_signals();
	execute_child_command(shell, arguments);
	return (0);
}

I will retry my inital test with fflush()

[saladuit]

That last return 0 is suspicious. I'm assuming execute_child_command is your execve(), and it should not return; normally reaching past it is a hard error, and you should _exit(127).

If the child ends up returning back to the criterion test function, it might explain why you're seeing a communication error, because both the test and the child are trying to send the assert result back to criterion.

With the addition of my latest post I really think that the executor can't 'stray off', at least not in this case. fair point that it should exit! But in this case it should just execute ls.

Or not. the environmnet is probably not loaded correctly, Is there a way to get the char **envp into criterion?

[Snaipe]

Well, the environment here has nothing to do with criterion -- as far as I can tell the environment you're loading is char *envp[] = {"HALLO=hello", NULL};, which means you won't be able to run ls because there's no PATH variable. execute_child_command likely just returns early.

[saladuit]

Is there a way to access the char **envp variable inside of Criterion?

[Snaipe]

You can just use environ:

extern char **environ;

Test(foo, bar) {
    // use environ
}

This is a weird feature of libc; there's no header to include it. Both glibc and musl support it.

[saladuit]

🤩

[saladuit]

I had to make a picture because it quickly exits:
If I only make the change you suggested the following occurs:

I had to run the command twice to show the end result, first entry.
And when I quickly make a picture, second entry

[saladuit]

it also doesn't work if I change "exit" into "ls"

[Snaipe]

Can you post the updated code of the test?

[saladuit]

Test(minishell_loop, test_ls_exit, .timeout=1/*  .init=redirect_stdfds */) {
    char *commands[] = {"ls", NULL};
    char *envp[] = {"HALLO=hello", NULL};
    t_minishell sheldon;

	ft_bzero(&sheldon, sizeof(t_minishell));
	sheldon.exit_status = envp_load(&sheldon.envd, envp);

    rl_instream = cr_get_redirected_stdin();
    fwrite(*commands, sizeof(char), strlen(*commands), rl_instream);
    fflush(rl_instream);
    cr_log_error("command_line: %s", sheldon.command_line);

    int result = minishell_loop(&sheldon);

    cr_log_error("command_line: %s", sheldon.command_line);
    cr_assert_eq(result, STOP);
    cr_assert_stdout_eq_str("xit\n");
    fflush(rl_instream);
    fclose(rl_instream);
}

[Snaipe]

I think in this case the ls is missing a newline and the readline is likely hanging.

[saladuit]

If i add '\n' it still hangs

[saladuit]

An important additon is that if I don't use my unit tester. the ls command just works:

I don't necessarily want to test readline, I just wanted to test the main part of my program with criterion to see whether I could find any code that wasn't being executed.I would also be perfectly happy if you have any other suggestion to tackle this problem!

[saladuit]

(a naked return is a return without argument, which are the two returns you have in your function)

My suggestion would be to either move the exit(127) out of execute_child_command and replace the return (0); of execute_simple_command (maybe replace it with err(127, "execve") if that's allowed, or a combination of fprintf(stderr, "your_command: execve: %s", strerror(errno)) followed by exit, or simply exit instead of returning.

Both approach prevent your child from leaking to its parent context, but the first (i.e. move the exit call) has at least the advantage of being able to handle the error correctly in execute_simple_command

You were correct in that my executor wasn't exiting properly!
Thank you very much for finding that.
Removing the naked returns fixed one of my issues.

I was however unable to write to rl_instream,
so I'm just going to forget about that and go with the following solution:

int32_t	minishell_loop(t_minishell *sheldon);

Test(minishell_loop, test_ls_exit)
{
    t_minishell sheldon;

	ft_bzero(&sheldon, sizeof(t_minishell));
	sheldon.command_line = strdup("ls"); //assign command_line directly
    minishell_loop(&sheldon);
}

int32_t	minishell_loop(t_minishell *sheldon)
{
	if (!sheldon->command_line) // check whether the command_line already exists.
		sheldon->command_line = readline(PROMPT);
	if (!sheldon->command_line && printf("\x1B[1A" PROMPT "exit\n"))
		return (STOP);
	if (!*sheldon->command_line)
	{
		free(sheldon->command_line);
		return (CONTINUE);
	}
	add_history(sheldon->command_line);
	sheldon->tokens = lexer(sheldon->command_line, &sheldon->exit_status);
	if (!sheldon->tokens)
		return (minishell_clean(sheldon));
	sheldon->ast = parser(sheldon->tokens);
	if (!sheldon->ast)
		return (minishell_clean(sheldon));
	sheldon->exit_status = executor(sheldon);
	return (minishell_clean(sheldon));
}

In this way I don't have to care about redirecting the stdin.
Still, I've spent so much time on this,
that if you ever come up with a working solution to directly write to readline,
I'd like to know.
Just out of curiosity.

[saladuit]

You were also right about exit btw. If I don't use _exit(), the child process doesn't get freed properly

[saladuit]

So I hope that no one is going to notice

[Snaipe]

I'd raise the issue to whoever gave you the assignment. exit is well known and documented to not be fork-safe, it's the wrong function to use when exiting from a fork, and it's a frequent source of bugs because all of the atexit handlers of the parent have to run twice, and usually with races. Forcing you to use exit over _exit is like telling you to knowingly add a bug to your program, willingly.

[saladuit]

I did!

[saladuit]

So I'm not exactly sure, but right now it even seems to work as expected:

#include <unit_test.h>

void redirect_stdfds(void)
{
    cr_redirect_stdin();
    cr_redirect_stdout();
}

int32_t	minishell_loop(t_minishell *sheldon);

Test(minishell_loop, test_ls_exit)
{
    t_minishell sheldon;

	ft_bzero(&sheldon, sizeof(t_minishell));
	rl_instream = fopen("test.txt", "r");
	// sheldon.command_line = strdup("ls");
    minishell_loop(&sheldon);
}

Gives this as output:

Sheldon$ ls

Command_table #1 at 0x60300015a0f0
        Command #1 at 0x60300015a0f0
                Argument #1: ls
malloc: No such file or directory
[====] Synthesis: Tested: 1 | Passing: 1 | Failing: 0 | Crashing: 0 

[saladuit]

Well it actually works right now
@Snaipe thank you sooo much!!!!
I think the executor was the real culprit afterall!

[saladuit]

I have one more question. Is there a criterion function to debug the stdout/stderr?

[Snaipe]

You can use cr_get_redirected_stdout and cr_get_redirected_stderr and read from them, but note that you can't use any of the cr_assert_stdout_* and cr_assert_stderr_* macros since both of them use these functions under the cover to consume content

[saladuit]

I've found that the easiest way is just removing the redirections 🤦

[saladuit]

My apologies for having so many questions. It cannot be understated how much your help is appreciated.
I do however have a follow up question. Following the redirect.c example. I'm expecting my test case to fail.
It doesn't however. with the following code snippet:

void redirect_stdfds(void)
{
    cr_redirect_stdout();
    cr_redirect_stderr();
}

int32_t	minishell_loop(t_minishell *sheldon);

TestSuite(minishell, .init=redirect_stdfds);

Test(minishell, test_ls_exit)
{
	rl_instream = fopen("ls.txt", "r");
    minishell(environ);
    fflush(stdout);
    fflush(stderr);
    cr_assert_stdout_eq_str("balsdhf;aj;dlfsild");
    cr_assert_stderr_eq_str("balsdhf;aj;dlfsild");
}

My test just passes.

~/repos/minishell increase_coverage📈* ❯ ./test.out --filter 'minishell/*'
[====] Synthesis: Tested: 1 | Passing: 1 | Failing: 0 | Crashing: 0 

Am I missing something?
if I uncomment the cr_redirect_* functions the following output is presented:

DEBUGINFOD_URLS=https://debuginfod.archlinux.org
PERL_LOCAL_LIB_ROOT=/home/saladuit/perl5:/home/saladuit/perl5
XDG_CACHE_HOME=/home/safoh/.cache
VTE_VERSION=7003
VIRTUAL_ENV_DISABLE_PROMPT=12
DISPLAY=:1
XDG_RUNTIME_DIR=/run/user/1000
HISTSIZE=1000000
PAGER=less
PERL_MM_OPT=INSTALL_BASE=/home/saladuit/perl5
SESSION_MANAGER=local/the-omega-arch:@/tmp/.ICE-unix/1274,unix/the-omega-arch:/tmp/.ICE-unix/1274
MOTD_SHOWN=pam
SSH_AUTH_SOCK=/run/user/1000/keyring/ssh
PATH=/home/saladuit/perl5/bin:/home/safoh/.brew/Cellar/llvm/15.0.7/bin/clangd:/home/safoh/.local/sbin:/home/safoh/.local/bin:/usr/local/bin:/usr/local/sbin:/home/safoh/.data/nvim/mason/bin:/home/saladuit/perl5/bin:/hom
e/safoh/.brew/Cellar/llvm/15.0.7/bin/clangd:/home/safoh/.local/sbin:/home/safoh/.local/bin:/usr/local/bin:/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/local/sbin:/usr/lib/jvm/default/bin:/usr/bin/site_perl:/usr/bin/ven
dor_perl:/usr/bin/core_perl:/home/safoh/.data/gem/ruby/3.0.0/bin:/home/safoh/.data/gem/ruby/3.0.0/bin
PROMPT_EOL_MARK=
GIO_LAUNCHED_DESKTOP_FILE_PID=1435
GDMSESSION=gnome
XDG_SESSION_TYPE=x11
SYSTEMD_EXEC_PID=1274
JOURNAL_STREAM=8:14571
LS_COLORS=rs=0:di=01;34:ln=01;36:mh=00:pi=40;33:so=01;35:do=01;35:bd=40;33;01:cd=40;33;01:or=40;31;01:mi=00:su=37;41:sg=30;43:ca=00:tw=30;42:ow=34;42:st=37;44:ex=01;32:*.tar=01;31:*.tgz=01;31:*.arc=01;31:*.arj=01;31:*.
taz=01;31:*.lha=01;31:*.lz4=01;31:*.lzh=01;31:*.lzma=01;31:*.tlz=01;31:*.txz=01;31:*.tzo=01;31:*.t7z=01;31:*.zip=01;31:*.z=01;31:*.dz=01;31:*.gz=01;31:*.lrz=01;31:*.lz=01;31:*.lzo=01;31:*.xz=01;31:*.zst=01;31:*.tzst=01
;31:*.bz2=01;31:*.bz=01;31:*.tbz=01;31:*.tbz2=01;31:*.tz=01;31:*.deb=01;31:*.rpm=01;31:*.jar=01;31:*.war=01;31:*.ear=01;31:*.sar=01;31:*.rar=01;31:*.alz=01;31:*.ace=01;31:*.zoo=01;31:*.cpio=01;31:*.7z=01;31:*.rz=01;31:
*.cab=01;31:*.wim=01;31:*.swm=01;31:*.dwm=01;31:*.esd=01;31:*.avif=01;35:*.jpg=01;35:*.jpeg=01;35:*.mjpg=01;35:*.mjpeg=01;35:*.gif=01;35:*.bmp=01;35:*.pbm=01;35:*.pgm=01;35:*.ppm=01;35:*.tga=01;35:*.xbm=01;35:*.xpm=01;
35:*.tif=01;35:*.tiff=01;35:*.png=01;35:*.svg=01;35:*.svgz=01;35:*.mng=01;35:*.pcx=01;35:*.mov=01;35:*.mpg=01;35:*.mpeg=01;35:*.m2v=01;35:*.mkv=01;35:*.webm=01;35:*.webp=01;35:*.ogm=01;35:*.mp4=01;35:*.m4v=01;35:*.mp4v
=01;35:*.vob=01;35:*.qt=01;35:*.nuv=01;35:*.wmv=01;35:*.asf=01;35:*.rm=01;35:*.rmvb=01;35:*.flc=01;35:*.avi=01;35:*.fli=01;35:*.flv=01;35:*.gl=01;35:*.dl=01;35:*.xcf=01;35:*.xwd=01;35:*.yuv=01;35:*.cgm=01;35:*.emf=01;3
5:*.ogv=01;35:*.ogx=01;35:*.aac=00;36:*.au=00;36:*.flac=00;36:*.m4a=00;36:*.mid=00;36:*.midi=00;36:*.mka=00;36:*.mp3=00;36:*.mpc=00;36:*.ogg=00;36:*.ra=00;36:*.wav=00;36:*.oga=00;36:*.opus=00;36:*.spx=00;36:*.xspf=00;3
6:*~=00;90:*#=00;90:*.bak=00;90:*.old=00;90:*.orig=00;90:*.part=00;90:*.rej=00;90:*.swp=00;90:*.tmp=00;90:*.dpkg-dist=00;90:*.dpkg-old=00;90:*.ucf-dist=00;90:*.ucf-new=00;90:*.ucf-old=00;90:*.rpmnew=00;90:*.rpmorig=00;
90:*.rpmsave=00;90:
DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/1000/bus
INTRAUSER=safoh
NVIM_LOG_FILE=/home/safoh/.local/state/nvim/log
DESKTOP_AUTOSTART_ID=1058539a311f5af3df167775097141231600000012740017
XAUTHORITY=/run/user/1000/gdm/Xauthority
XDG_SESSION_CLASS=user
USER=safoh
NVIM=/run/user/1000/nvim.19565.0
TERM=xterm-256color
SHLVL=2
EDITOR=nvim
LANG=en_US.UTF-8
DATE=02-03-2023
XDG_MENU_PREFIX=gnome-
LOGNAME=safoh
XDG_SESSION_DESKTOP=gnome
COLORTERM=truecolor
GEM_HOME=/home/safoh/.data/gem/ruby/3.0.0
XDG_DATA_HOME=/home/safoh/.data
SHELL=/bin/zsh
TERM_PROGRAM=guake
XDG_CURRENT_DESKTOP=GNOME
ZSH_CACHE=/home/safoh/.cache/zsh
ZSH_CONFIG=/home/safoh/repos/dotfiles/zsh
DESKTOP_SESSION=gnome
WINDOWPATH=2
NVIM_CONFIG=/home/safoh/repos/dotfiles/nvim
BXFI_MAP=/bxfi_58672
USERNAME=safoh
OLDPWD=/home/safoh/repos/minishell
LSCOLORS=Gxfxcxdxbxegedabagacad
GUAKE_TAB_UUID=d374eb23-216a-490e-95c9-3974d95a654f
[email protected]
LESSHISTFILE=/home/safoh/.cache/less/less_history
XDG_CONFIG_HOME=/home/safoh/.config
PERL_MB_OPT=--install_base "/home/saladuit/perl5"
LESS=-R
GIO_LAUNCHED_DESKTOP_FILE=/home/safoh/.config/autostart/guake.desktop
LESS_CACHE=/home/safoh/.cache/less
GMON_OUT_PREFIX=sandbox-gmon
GDM_LANG=en_US.UTF-8
PWD=/home/safoh/repos/minishell
NVIM_DATA=/home/safoh/.data/nvim/autoload
VIMRUNTIME=/usr/share/nvim/runtime
HISTFILE=/home/safoh/.cache/zsh/zsh_history
MANAGERPID=1156
CONDA_CHANGEPS1=no
PERL5LIB=/home/saladuit/perl5/lib/perl5:/home/saladuit/perl5/lib/perl5
MYVIMRC=/home/safoh/.vimrc
HOME=/home/safoh
_=/home/safoh/repos/minishell/./test.out
SAVEHIST=1000000
isatty: Inappropriate ioctl for device

Command_table #1 at 0x60300015b7d0
        Command #1 at 0x60300015b7d0
                Argument #1: ls
build  compile_commands.json  include  libs  ls.txt  Makefile  makerc  minishell.out  norme.sh  README.md  src  test.out  unit_test

Command_table #1 at 0x60300015b860
        Command #1 at 0x60300015b860
                Argument #1: exit
[====] Synthesis: Tested: 1 | Passing: 1 | Failing: 0 | Crashing: 0 

[saladuit]

(the is atty line can be ignored btw. I'll just have not check it if I'm testing)

[Snaipe]

Can you run your test under strace -f -o strace.txt and add the strace.txt file as a file attachment here?

[saladuit]

strace_no_fsan.txt

[saladuit]

it somewhat works?

static int read_from_file(void *cookie, void *buffer, size_t *size)
{
    FILE *file = (FILE *)cookie;
    size_t read_size = fread(buffer, 1, *size, file);
    *size = read_size;
    return 0;
}

Test(minishell, stream)
{
    FILE *f_stdin = cr_get_redirected_stdin();
    struct cr_stream actual = {
        .cookie = cr_get_redirected_stdout(),
        .read   = read_from_file,
    };

    struct cr_stream expected = {
        .cookie = fopen("ls.txt", "r"),
        .read   = read_from_file,
    };
    cr_stream_init(&expected);
    cr_stream_init(&actual);
	fputs("ls\nEOF", f_stdin);
    fclose(f_stdin);
    minishell(environ);
    fflush(stdout);
    fflush(stdin);
    fflush(stderr);

    cr_assert(eq(stream, expected, actual));

}

Results in the following output, altough hard to read:

✦ ~/repos/minishell increase_coverage📈* ❯ ./test.out --filter 'minishell/stream'
[----] src/minishell_cases.c:61: Assertion Failed
[----]   eq(stream, expected, actual): 
[----]     @@ -1,2 +1,257 @@
[----]     -00: 6c730a45 4f460a                      ls.EOF.         
[----]     +00: 44454255 47494e46 4f445f55 524c533d  DEBUGINFOD_URLS=
[----]     +10: 68747470 733a2f2f 64656275 67696e66  https://debuginf
[----]     +20: 6f642e61 7263686c 696e7578 2e6f7267  od.archlinux.org
[----]     +30: 0a504552 4c5f4c4f 43414c5f 4c49425f  .PERL_LOCAL_LIB_
[----]     +40: 524f4f54 3d2f686f 6d652f73 616c6164  ROOT=/home/salad
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[----]     +cb0: 7465726d 2d323536 636f6c6f 720a5348  term-256color.SH
[----]     +cc0: 4c564c3d 320a4544 49544f52 3d6e7669  LVL=2.EDITOR=nvi
[----]     +cd0: 6d0a4c41 4e473d65 6e5f5553 2e555446  m.LANG=en_US.UTF
[----]     +ce0: 2d380a44 4154453d 30322d30 332d3230  -8.DATE=02-03-20
[----]     +cf0: 32330a58 44475f4d 454e555f 50524546  23.XDG_MENU_PREF
[----]     +d00: 49583d67 6e6f6d65 2d0a4c4f 474e414d  IX=gnome-.LOGNAM
[----]     +d10: 453d7361 666f680a 5a53483d 2f686f6d  E=safoh.ZSH=/hom
[----]     +d20: 652f7361 666f682f 2e646174 612f7368  e/safoh/.data/sh
[----]     +d30: 656c646f 6e2f7265 706f732f 67697468  eldon/repos/gith
[----]     +d40: 75622e63 6f6d2f6f 686d797a 73682f6f  ub.com/ohmyzsh/o
[----]     +d50: 686d797a 73680a58 44475f53 45535349  hmyzsh.XDG_SESSI
[----]     +d60: 4f4e5f44 45534b54 4f503d67 6e6f6d65  ON_DESKTOP=gnome
[----]     +d70: 0a434f4c 4f525445 524d3d74 72756563  .COLORTERM=truec
[----]     +d80: 6f6c6f72 0a47454d 5f484f4d 453d2f68  olor.GEM_HOME=/h
[----]     +d90: 6f6d652f 7361666f 682f2e64 6174612f  ome/safoh/.data/
[----]     +da0: 67656d2f 72756279 2f332e30 2e300a58  gem/ruby/3.0.0.X
[----]     +db0: 44475f44 4154415f 484f4d45 3d2f686f  DG_DATA_HOME=/ho
[----]     +dc0: 6d652f73 61666f68 2f2e6461 74610a53  me/safoh/.data.S
[----]     +dd0: 48454c4c 3d2f6269 6e2f7a73 680a5445  HELL=/bin/zsh.TE
[----]     +de0: 524d5f50 524f4752 414d3d67 75616b65  RM_PROGRAM=guake
[----]     +df0: 0a584447 5f435552 52454e54 5f444553  .XDG_CURRENT_DES
[----]     +e00: 4b544f50 3d474e4f 4d450a5a 53485f43  KTOP=GNOME.ZSH_C
[----]     +e10: 41434845 3d2f686f 6d652f73 61666f68  ACHE=/home/safoh
[----]     +e20: 2f2e6361 6368652f 7a73680a 5a53485f  /.cache/zsh.ZSH_
[----]     +e30: 434f4e46 49473d2f 686f6d65 2f736166  CONFIG=/home/saf
[----]     +e40: 6f682f72 65706f73 2f646f74 66696c65  oh/repos/dotfile
[----]     +e50: 732f7a73 680a4445 534b544f 505f5345  s/zsh.DESKTOP_SE
[----]     +e60: 5353494f 4e3d676e 6f6d650a 57494e44  SSION=gnome.WIND
[----]     +e70: 4f575041 54483d32 0a4e5649 4d5f434f  OWPATH=2.NVIM_CO
[----]     +e80: 4e464947 3d2f686f 6d652f73 61666f68  NFIG=/home/safoh
[----]     +e90: 2f726570 6f732f64 6f746669 6c65732f  /repos/dotfiles/
[----]     +ea0: 6e76696d 0a425846 495f4d41 503d2f62  nvim.BXFI_MAP=/b
[----]     +eb0: 7866695f 39383838 370a5553 45524e41  xfi_98887.USERNA
[----]     +ec0: 4d453d73 61666f68 0a4f4c44 5057443d  ME=safoh.OLDPWD=
[----]     +ed0: 2f686f6d 652f7361 666f682f 7265706f  /home/safoh/repo
[----]     +ee0: 732f6d69 6e697368 656c6c0a 4c53434f  s/minishell.LSCO
[----]     +ef0: 4c4f5253 3d477866 78637864 78627865  LORS=Gxfxcxdxbxe
[----]     +f00: 67656461 62616761 6361640a 4755414b  gedabagacad.GUAK
[----]     +f10: 455f5441 425f5555 49443d64 33373465  E_TAB_UUID=d374e
[----]     +f20: 6232332d 32313661 2d343930 652d3935  b23-216a-490e-95
[----]     +f30: 63392d33 39373464 39356136 3534660a  c9-3974d95a654f.
[----]     +f40: 4d41494c 3d736166 6f684073 74756465  MAIL=safoh@stude
[----]     +f50: 6e742e63 6f64616d 2e6e6c0a 4c455353  nt.codam.nl.LESS
[----]     +f60: 48495354 46494c45 3d2f686f 6d652f73  HISTFILE=/home/s
[----]     +f70: 61666f68 2f2e6361 6368652f 6c657373  afoh/.cache/less
[----]     +f80: 2f6c6573 735f6869 73746f72 790a5844  /less_history.XD
[----]     +f90: 475f434f 4e464947 5f484f4d 453d2f68  G_CONFIG_HOME=/h
[----]     +fa0: 6f6d652f 7361666f 682f2e63 6f6e6669  ome/safoh/.confi
[----]     +fb0: 670a5045 524c5f4d 425f4f50 543d2d2d  g.PERL_MB_OPT=--
[----]     +fc0: 696e7374 616c6c5f 62617365 20222f68  install_base "/h
[----]     +fd0: 6f6d652f 73616c61 64756974 2f706572  ome/saladuit/per
[----]     +fe0: 6c35220a 4c455353 3d2d520a 47494f5f  l5".LESS=-R.GIO_
[----]     +ff0: 4c41554e 43484544 5f444553 4b544f50  LAUNCHED_DESKTOP
[----]      
[FAIL] minishell::stream: (0.01s)
[====] Synthesis: Tested: 1 | Passing: 0 | Failing: 1 | Crashing: 0 

[saladuit]

I really don't know where all of the numbers come from

[saladuit]

static int read_from_file(void *cookie, void *buffer, size_t *size)
{
    FILE *file = (FILE *)cookie;
    size_t read_size = fread(buffer, 1, *size, file);
    *size = read_size;
    return 0;
}

Test(minishell, stream)
{
    FILE *f_stdin = cr_get_redirected_stdin();
    struct cr_stream actual = {
        .cookie = cr_get_redirected_stdout(),
        .read   = read_from_file,
    };

    system("bash -c 'pwd' >| unit_test/test_files/pwd/pwd-bash.txt");
    struct cr_stream expected = {
        .cookie = fopen("unit_test/test_files/pwd/pwd-bash.txt", "r"),
        .read   = read_from_file,
    };
    cr_stream_init(&expected);
    cr_stream_init(&actual);
	fputs("pwd\nEOF", f_stdin);
    fclose(f_stdin);
    minishell(environ);
    fflush(stdout);
    fflush(stdin);
    fflush(stderr);

    cr_assert(eq(stream, expected, actual));

}

I can't really tell what I'm doing wrong at this point. It is something that would make my life easier. So I'm goint to try to figure it out.

[saladuit]

OOOOh
is see
need to turn of my debug options

[saladuit]

static int read_from_file(void *cookie, void *buffer, size_t *size)
{
    FILE *file = (FILE *)cookie;
    size_t read_size = fread(buffer, 1, *size, file);
    *size = read_size;
    return 0;
}

Test(minishell, stream)
{
    FILE *f_stdin = cr_get_redirected_stdin();
    struct cr_stream actual = {
        .cookie = cr_get_redirected_stdout(),
        .read   = read_from_file,
    };

    system("bash -c 'echo $SHELL' >| unit_test/test_files/pwd/pwd-bash.txt");
    struct cr_stream expected = {
        .cookie = fopen("unit_test/test_files/pwd/pwd-bash.txt", "r"),
        .read   = read_from_file,
    };
    cr_stream_init(&expected);
    cr_stream_init(&actual);
	fputs("pwd\nEOF", f_stdin);
    fclose(f_stdin);
    minishell(environ);
    fflush(stdout);
    fflush(stdin);
    fflush(stderr);

    cr_assert(eq(stream, expected, actual));

}

If accidentally made the input differ:
[----] src/minishell_cases.c:63: Assertion Failed
[----]   eq(stream, expected, actual): 
[----]     @@ -1,2 +1,3 @@
[----]     -00: 2f62696e 2f7a7368 0a                 /bin/zsh.       
[----]     +00: 2f686f6d 652f7361 666f682f 7265706f  /home/safoh/repo
[----]     +10: 732f6d69 6e697368 656c6c0a           s/minishell.    
[----]      
[FAIL] minishell::stream: (0.01s)
[====] Synthesis: Tested: 1 | Passing: 0 | Failing: 1 | Crashing: 0 
make: *** [Makefile:71: ftest] Error 1

If you think this is acceptable I can make a pull request. I'm curious whether people will actually use this due to it's complexity. Perhaps I can think of some sort of wrapper that makes the usage easier.