/* test_join_worker_args.c -- xce-test-cli-ux task 2.6 remediation
 * (bug-1557 fix)
 *
 * Unity unit tests for join_worker_args.c's join_worker_parse_attrs(),
 * extracted from test.c's cmd_join_worker() (see join_worker_args.h for the
 * full extraction rationale). This is the permanent, automated regression
 * guard for bug-1557 (join's stale maxmem default): review had confirmed
 * the fix value/unit were already correct in cmd_join_worker, but rejected
 * that task for lacking a permanent test given a genuine testable seam
 * existed -- this file is that test.
 *
 * Standalone Unity main (this binary is its own test executable -- see
 * meson.build's join_worker_args_unit_test), mirroring
 * joblist_display_unit_test's/resval_typeresolve_unit_test's own pattern.
 */
#include <errno.h>
#include <stdio.h>
#include <string.h>

#include <unity/unity.h>

#include "join_worker_args.h"
#include "xce/types.h" /* hostattrs_t */

/* Requirement 12.1's actual regression guard: no -m flag given must default
 * maxmem to 64 * 1024 * 1024 (64 MB expressed in the codebase's
 * bytes-canonical unit) -- not the pre-bug-1557 nonsensical 64 bytes. */
static void test_join_worker_default_maxmem_is_64mb_in_bytes(void)
{
    char*       argv[] = { "join" };
    hostattrs_t attrs;
    int         rc = join_worker_parse_attrs(1, argv, &attrs);

    TEST_ASSERT_EQUAL_INT(0, rc);
    /* This Unity build has double-precision assertions disabled -- use
     * TEST_ASSERT_EQUAL_FLOAT (this file's own convention, matching
     * test_listfmt_json.c/test_wal_job_rusage_fact.c) instead. 64 * 1024 *
     * 1024 is an exact power of two, so the float round-trip is exact. */
    TEST_ASSERT_EQUAL_FLOAT_MESSAGE(
        (float)(64 * 1024 * 1024), (float)attrs.maxmem,
        "join's default maxmem must be 64 * 1024 * 1024 bytes (bug-1557, "
        "Requirement 12.1)");
}

/* Proves the flag-parsing itself still works after extraction, not just the
 * default: -m <value> must override the default exactly. */
static void test_join_worker_dash_m_overrides_default(void)
{
    char*       argv[] = { "join", "-m", "12345" };
    hostattrs_t attrs;
    int         rc = join_worker_parse_attrs(3, argv, &attrs);

    TEST_ASSERT_EQUAL_INT(0, rc);
    TEST_ASSERT_EQUAL_FLOAT_MESSAGE(
        12345.0f, (float)attrs.maxmem,
        "-m <value> must override join's default maxmem");
}

/* Fail-loud behavior (matching this file's error-handling convention
 * elsewhere): an unrecognized flag must return the negative-errno error
 * code, not silently succeed with a partially-parsed attrs. */
static void test_join_worker_unrecognized_flag_returns_einval(void)
{
    char*       argv[] = { "join", "-z", "bogus" };
    hostattrs_t attrs;
    int         rc = join_worker_parse_attrs(3, argv, &attrs);

    TEST_ASSERT_EQUAL_INT(-EINVAL, rc);
}

/* A NULL attrs pointer must also fail loud rather than crash. */
static void test_join_worker_null_attrs_returns_einval(void)
{
    char* argv[] = { "join" };
    int   rc = join_worker_parse_attrs(1, argv, NULL);

    TEST_ASSERT_EQUAL_INT(-EINVAL, rc);
}

/* Documents/locks in the CURRENT (still-buggy, unchanged-by-this-task)
 * default values of maxcpus/maxswap/maxtmp -- the sibling same-class fields
 * task 2.6's implementer correctly declined to touch (a separate,
 * recommended follow-up bug covers them). If someone later fixes those
 * fields, THIS test's assertions (specific to maxmem) must not be confused
 * with assertions on those separate fields. */
static void test_join_worker_sibling_defaults_unchanged(void)
{
    char*       argv[] = { "join" };
    hostattrs_t attrs;
    int         rc = join_worker_parse_attrs(1, argv, &attrs);

    TEST_ASSERT_EQUAL_INT(0, rc);
    TEST_ASSERT_EQUAL_INT_MESSAGE(
        4, attrs.maxcpus,
        "maxcpus default is unchanged by task 2.6 (bug-1557 scoped to "
        "maxmem only)");
    TEST_ASSERT_EQUAL_FLOAT_MESSAGE(
        1024.0f, (float)attrs.maxswap,
        "maxswap's still-buggy default is intentionally unchanged by task "
        "2.6 -- separate follow-up bug covers it");
    TEST_ASSERT_EQUAL_FLOAT_MESSAGE(
        2048.0f, (float)attrs.maxtmp,
        "maxtmp's still-buggy default is intentionally unchanged by task "
        "2.6 -- separate follow-up bug covers it");
}

/* ------------------------------------------------------------------ */
/* Standalone Unity main (this binary is its own test executable -- see  */
/* meson.build's join_worker_args_unit_test)                             */
/* ------------------------------------------------------------------ */

void setUp(void) { return; }
void tearDown(void) { return; }

int main(void)
{
    printf("\n>> xce-test-cli-ux task 2.6 remediation: join_worker_args "
           "join_worker_parse_attrs (bug-1557)\n\n");

    UNITY_BEGIN();

    RUN_TEST(test_join_worker_default_maxmem_is_64mb_in_bytes);
    RUN_TEST(test_join_worker_dash_m_overrides_default);
    RUN_TEST(test_join_worker_unrecognized_flag_returns_einval);
    RUN_TEST(test_join_worker_null_attrs_returns_einval);
    RUN_TEST(test_join_worker_sibling_defaults_unchanged);

    return UNITY_END();
}