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73 lines
2 KiB
C++
73 lines
2 KiB
C++
/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
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// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
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#include <stdlib.h>
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#include <ft/comparator.h>
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static int MAGIC = 49;
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static DBT dbt_a;
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static DBT dbt_b;
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static DESCRIPTOR expected_desc;
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static int magic_compare(DB *db, const DBT *a, const DBT *b) {
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invariant(db && a && b);
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invariant(db->cmp_descriptor == expected_desc);
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invariant(a == &dbt_a);
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invariant(b == &dbt_b);
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return MAGIC;
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}
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static void test_desc(void) {
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int c;
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toku::comparator cmp;
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DESCRIPTOR_S d1, d2;
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// create with d1, make sure it gets used
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cmp.create(magic_compare, &d1);
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expected_desc = &d1;
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c = cmp.compare(&dbt_a, &dbt_b);
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invariant(c == MAGIC);
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// set desc to d2, make sure it gets used
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cmp.set_descriptor(&d2);
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expected_desc = &d2;
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c = cmp.compare(&dbt_a, &dbt_b);
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invariant(c == MAGIC);
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}
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static int dont_compare_me_bro(DB *db, const DBT *a, const DBT *b) {
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abort();
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return db && a && b;
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}
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static void test_infinity(void) {
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int c;
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toku::comparator cmp;
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cmp.create(dont_compare_me_bro, nullptr);
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// make sure infinity-valued end points compare as expected
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// to an arbitrary (uninitialized!) dbt. the comparison function
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// should never be called and thus the dbt never actually read.
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DBT arbitrary_dbt;
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c = cmp.compare(&arbitrary_dbt, toku_dbt_positive_infinity());
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invariant(c < 0);
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c = cmp.compare(toku_dbt_negative_infinity(), &arbitrary_dbt);
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invariant(c < 0);
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c = cmp.compare(toku_dbt_positive_infinity(), &arbitrary_dbt);
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invariant(c > 0);
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c = cmp.compare(&arbitrary_dbt, toku_dbt_negative_infinity());
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invariant(c > 0);
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c = cmp.compare(toku_dbt_negative_infinity(), toku_dbt_negative_infinity());
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invariant(c == 0);
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c = cmp.compare(toku_dbt_positive_infinity(), toku_dbt_positive_infinity());
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invariant(c == 0);
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}
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int main(void) {
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test_desc();
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test_infinity();
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return 0;
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}
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