qht: add test program

Acked-by: Sergey Fedorov <sergey.fedorov@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Emilio G. Cota <cota@braap.org>
Message-Id: <1465412133-3029-12-git-send-email-cota@braap.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>

1 files changed, 159 insertions, 0 deletions

diff --git a/tests/test-qht.c b/tests/test-qht.c
new file mode 100644
index 0000000000..c8eb9305ed
--- /dev/null
+++ b/tests/test-qht.c
@@ -0,0 +1,159 @@
+/*
+ * Copyright (C) 2016, Emilio G. Cota <cota@braap.org>
+ *
+ * License: GNU GPL, version 2 or later.
+ *   See the COPYING file in the top-level directory.
+ */
+#include "qemu/osdep.h"
+#include <glib.h>
+#include "qemu/qht.h"
+
+#define N 5000
+
+static struct qht ht;
+static int32_t arr[N * 2];
+
+static bool is_equal(const void *obj, const void *userp)
+{
+    const int32_t *a = obj;
+    const int32_t *b = userp;
+
+    return *a == *b;
+}
+
+static void insert(int a, int b)
+{
+    int i;
+
+    for (i = a; i < b; i++) {
+        uint32_t hash;
+
+        arr[i] = i;
+        hash = i;
+
+        qht_insert(&ht, &arr[i], hash);
+    }
+}
+
+static void rm(int init, int end)
+{
+    int i;
+
+    for (i = init; i < end; i++) {
+        uint32_t hash;
+
+        hash = arr[i];
+        g_assert_true(qht_remove(&ht, &arr[i], hash));
+    }
+}
+
+static void check(int a, int b, bool expected)
+{
+    struct qht_stats stats;
+    int i;
+
+    for (i = a; i < b; i++) {
+        void *p;
+        uint32_t hash;
+        int32_t val;
+
+        val = i;
+        hash = i;
+        p = qht_lookup(&ht, is_equal, &val, hash);
+        g_assert_true(!!p == expected);
+    }
+    qht_statistics_init(&ht, &stats);
+    if (stats.used_head_buckets) {
+        g_assert_cmpfloat(qdist_avg(&stats.chain), >=, 1.0);
+    }
+    g_assert_cmpuint(stats.head_buckets, >, 0);
+    qht_statistics_destroy(&stats);
+}
+
+static void count_func(struct qht *ht, void *p, uint32_t hash, void *userp)
+{
+    unsigned int *curr = userp;
+
+    (*curr)++;
+}
+
+static void check_n(size_t expected)
+{
+    struct qht_stats stats;
+
+    qht_statistics_init(&ht, &stats);
+    g_assert_cmpuint(stats.entries, ==, expected);
+    qht_statistics_destroy(&stats);
+}
+
+static void iter_check(unsigned int count)
+{
+    unsigned int curr = 0;
+
+    qht_iter(&ht, count_func, &curr);
+    g_assert_cmpuint(curr, ==, count);
+}
+
+static void qht_do_test(unsigned int mode, size_t init_entries)
+{
+    qht_init(&ht, 0, mode);
+
+    insert(0, N);
+    check(0, N, true);
+    check_n(N);
+    check(-N, -1, false);
+    iter_check(N);
+
+    rm(101, 102);
+    check_n(N - 1);
+    insert(N, N * 2);
+    check_n(N + N - 1);
+    rm(N, N * 2);
+    check_n(N - 1);
+    insert(101, 102);
+    check_n(N);
+
+    rm(10, 200);
+    check_n(N - 190);
+    insert(150, 200);
+    check_n(N - 190 + 50);
+    insert(10, 150);
+    check_n(N);
+
+    rm(1, 2);
+    check_n(N - 1);
+    qht_reset_size(&ht, 0);
+    check_n(0);
+    check(0, N, false);
+
+    qht_destroy(&ht);
+}
+
+static void qht_test(unsigned int mode)
+{
+    qht_do_test(mode, 0);
+    qht_do_test(mode, 1);
+    qht_do_test(mode, 2);
+    qht_do_test(mode, 8);
+    qht_do_test(mode, 16);
+    qht_do_test(mode, 8192);
+    qht_do_test(mode, 16384);
+}
+
+static void test_default(void)
+{
+    qht_test(0);
+}
+
+static void test_resize(void)
+{
+    qht_test(QHT_MODE_AUTO_RESIZE);
+}
+
+int main(int argc, char *argv[])
+{
+    g_test_init(&argc, &argv, NULL);
+    g_test_add_func("/qht/mode/default", test_default);
+    g_test_add_func("/qht/mode/resize", test_resize);
+    return g_test_run();
+}