// testRunner.c -- the bin/calog runner end to end, as a user runs it: calogScript() names each
// script's own file (with the extension the runner found for an extensionless name) and is "" in a
// task, which no file started; calogArgs() hands every script the arguments after "--". The scripts
// are in tests/runner; whoami.lua ends the run once the others have printed.

#define _POSIX_C_SOURCE 200809L

#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <sys/wait.h>

#define CHECK(cond, msg) checkImpl((cond), (msg), __FILE__, __LINE__)

#define OUTPUT_MAX  4096
// timeout(1) bounds a runner that never ends, so a regression fails here instead of hanging make test
#define RUN_COMMAND "timeout 60 ./bin/calog tests/runner/whoami tests/runner/whoami.js -- one two 2>&1"

static int32_t testsRun    = 0;
static int32_t testsFailed = 0;

static void checkImpl(bool condition, const char *message, const char *file, int32_t line);
static void testScriptAndArgs(void);


static void checkImpl(bool condition, const char *message, const char *file, int32_t line) {
    testsRun++;
    if (!condition) {
        testsFailed++;
        printf("FAIL %s:%d  %s\n", file, line, message);
    }
}


static void testScriptAndArgs(void) {
    char   output[OUTPUT_MAX];
    size_t length;
    FILE  *run;
    int    status;

    run = popen(RUN_COMMAND, "r");
    CHECK(run != NULL, "the runner starts");
    if (run == NULL) {
        return;
    }
    length = fread(output, 1, sizeof(output) - 1, run);
    output[length] = '\0';
    status = pclose(run);

    CHECK(WIFEXITED(status) && WEXITSTATUS(status) == 0, "the run ends with the code calogExit gave it");
    CHECK(strstr(output, "lua tests/runner/whoami.lua one,two\n") != NULL, "an extensionless script's calogScript() is the file the runner found, and calogArgs() the arguments after --");
    CHECK(strstr(output, "js tests/runner/whoami.js one,two\n") != NULL, "each script of a run has its own calogScript()");
    CHECK(strstr(output, "task []\n") != NULL, "calogScript() is empty in a task, which no file started");
    if (testsFailed != 0) {
        printf("runner output:\n%s", output);
    }
}


int main(void) {
    testScriptAndArgs();

    printf("\n%d checks, %d failed\n", testsRun, testsFailed);
    fflush(stdout);
    if (testsFailed != 0) {
        return 1;
    }
    return 0;
}