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#include <gtest/gtest.h>
#include "fieldstat.h"
#include "utils.hpp"
#include "hdr/hdr_histogram.h"
#include "histogram_encoder.h"
struct fieldstat *test_init_standard_instance_one_cube_one_metric_one_cell_hdr()
{
struct fieldstat *instance = fieldstat_new();
int cube_id = fieldstat_create_cube(instance, &TEST_SHARED_TAG, 1, SAMPLING_MODE_COMPREHENSIVE, 10);
EXPECT_EQ(cube_id, 0);
int metric_id = fieldstat_register_hist(instance, "czz_test hdr metric", 1, 600000, 3);
EXPECT_EQ(metric_id, 0);
return instance;
}
void test_assert_standard_instance(const struct fieldstat *instance)
{
int *ret_cube_id_arr = NULL;
int n_cube = 0;
fieldstat_get_cubes(instance, &ret_cube_id_arr, &n_cube);
EXPECT_EQ(n_cube, 1);
int ret_cell_id = ret_cube_id_arr[0];
free(ret_cube_id_arr);
EXPECT_EQ(ret_cell_id, 0);
const char *name = fieldstat_get_metric_name(instance, 0);
EXPECT_STREQ(name, "czz_test hdr metric");
struct fieldstat_tag_list *tag_list = NULL;
size_t n_cell = 0;
fieldstat_get_cells_used_by_metric(instance, 0, 0, &tag_list, &n_cell);
EXPECT_EQ(n_cell, 1);
EXPECT_EQ(tag_list->n_tag, 1);
EXPECT_STREQ(tag_list->tag[0].key, TEST_TAG_STRING.key);
fieldstat_tag_list_arr_free(tag_list, n_cell);
}
TEST(metric_test_histogram, simple_register_and_query)
{
struct fieldstat *instance = test_init_standard_instance_one_cube_one_metric_one_cell_hdr();
fieldstat_hist_record(instance, 0, 0, &TEST_TAG_STRING, 1, 1234);
fieldstat_hist_record(instance, 0, 0, &TEST_TAG_STRING, 1, 1234);
fieldstat_hist_record(instance, 0, 0, &TEST_TAG_STRING, 1, 123);
test_assert_standard_instance(instance);
EXPECT_EQ(fieldstat_hist_value_at_percentile(instance, 0, 0, &TEST_TAG_LIST_STRING, 50.0), 1234);
EXPECT_EQ(fieldstat_hist_count_le_value(instance, 0, 0, &TEST_TAG_LIST_STRING, 1000), 1);
fieldstat_free(instance);
}
TEST(metric_test_histogram, merge)
{
struct fieldstat *instance = test_init_standard_instance_one_cube_one_metric_one_cell_hdr();
fieldstat_hist_record(instance, 0, 0, &TEST_TAG_STRING, 1, 1234);
fieldstat_hist_record(instance, 0, 0, &TEST_TAG_STRING, 1, 1234);
fieldstat_hist_record(instance, 0, 0, &TEST_TAG_STRING, 1, 123);
struct fieldstat *instance_total = fieldstat_new();
fieldstat_merge(instance_total, instance);
// query
test_assert_standard_instance(instance_total);
EXPECT_EQ(fieldstat_hist_value_at_percentile(instance_total, 0, 0, &TEST_TAG_LIST_STRING, 50.0), 1234);
EXPECT_EQ(fieldstat_hist_count_le_value(instance, 0, 0, &TEST_TAG_LIST_STRING, 1000), 1);
fieldstat_free(instance);
fieldstat_free(instance_total);
}
TEST(metric_test_histogram, merge_twice_with_reset)
{
struct fieldstat *instance = test_init_standard_instance_one_cube_one_metric_one_cell_hdr();
fieldstat_hist_record(instance, 0, 0, &TEST_TAG_STRING, 1, 1234);
fieldstat_hist_record(instance, 0, 0, &TEST_TAG_STRING, 1, 123);
struct fieldstat *instance_total = fieldstat_new();
fieldstat_merge(instance_total, instance);
fieldstat_reset(instance);
fieldstat_hist_record(instance, 0, 0, &TEST_TAG_STRING, 1, 1234);
fieldstat_merge(instance_total, instance);
test_assert_standard_instance(instance_total);
EXPECT_EQ(fieldstat_hist_value_at_percentile(instance_total, 0, 0, &TEST_TAG_LIST_STRING, 50.0), 1234);
EXPECT_EQ(fieldstat_hist_count_le_value(instance_total, 0, 0, &TEST_TAG_LIST_STRING, 1000), 1);
fieldstat_free(instance);
fieldstat_free(instance_total);
}
TEST(metric_test_histogram, add_with_wrong_cube_id_expecting_fail)
{
struct fieldstat *instance = fieldstat_new();
int cube_id = fieldstat_create_cube(instance, &TEST_TAG_INT_collided, 1, SAMPLING_MODE_COMPREHENSIVE, 10);
int ret = fieldstat_hist_record(instance, cube_id + 1, 0, &TEST_TAG_INT, 1, 1);
EXPECT_EQ(ret, FS_ERR_INVALID_CUBE_ID);
ret = fieldstat_hist_record(instance, -1, 0, &TEST_TAG_INT, 1, 1);
EXPECT_EQ(ret, FS_ERR_INVALID_CUBE_ID);
fieldstat_free(instance);
}
TEST(metric_test_histogram, add_with_wrong_metric_id_expecting_fail)
{
struct fieldstat *instance = fieldstat_new();
int cube_id = fieldstat_create_cube(instance, &TEST_TAG_INT_collided, 1, SAMPLING_MODE_COMPREHENSIVE, 10);
int metric_id = fieldstat_register_hist(instance, "czz_test", 1, 600000, 3);
int ret = fieldstat_hist_record(instance, cube_id, metric_id + 1, &TEST_TAG_INT, 1, 1);
EXPECT_EQ(ret, FS_ERR_INVALID_METRIC_ID);
ret = fieldstat_hist_record(instance, cube_id, -1, &TEST_TAG_INT, 1, 1);
EXPECT_EQ(ret, FS_ERR_INVALID_METRIC_ID);
fieldstat_free(instance);
}
extern "C" {
bool fieldstat_is_hll(char *buf);
}
TEST(metric_test_histogram, encode_decode_b64)
{
struct hdr_histogram *h = NULL;
hdr_init(1, 10000, 5, &h);
hdr_record_value(h, 1234);
hdr_record_value(h, 1234);
hdr_record_value(h, 4312);
char *b64 = NULL;
size_t b64_len = 0;
histogram_encode_into_b64(h, &b64, &b64_len);
EXPECT_FALSE(fieldstat_is_hll(b64));
struct hdr_histogram *h2 = histogram_decode_from_b64(b64, b64_len);
EXPECT_TRUE(h2 != NULL);
EXPECT_EQ(h->lowest_discernible_value, h2->lowest_discernible_value);
EXPECT_EQ(h->highest_trackable_value, h2->highest_trackable_value);
EXPECT_EQ(h->significant_figures, h2->significant_figures);
EXPECT_EQ(h->counts_len, h2->counts_len);
for (int i = 0; i < h2->counts_len; i++)
{
EXPECT_EQ(h->counts[i], h2->counts[i]);
}
free(b64);
hdr_close(h);
hdr_close(h2);
}
TEST(metric_test_histogram, can_add_0value) // histogram only allow min_val > 0, but it can accept value == 0
{
struct fieldstat *instance = fieldstat_new();
int cube_id = fieldstat_create_cube(instance, &TEST_TAG_INT_collided, 1, SAMPLING_MODE_COMPREHENSIVE, 10);
int metric_id = fieldstat_register_hist(instance, "czz_test", 1, 600000, 3);
int ret = fieldstat_hist_record(instance, cube_id, metric_id, &TEST_TAG_INT, 1, 0);
EXPECT_EQ(ret, 0);
ret = fieldstat_hist_record(instance, cube_id, metric_id, &TEST_TAG_INT, 1, 0);
EXPECT_EQ(ret, 0);
ret = fieldstat_hist_record(instance, cube_id, metric_id, &TEST_TAG_INT, 1, 500);
EXPECT_EQ(fieldstat_hist_value_at_percentile(instance, cube_id, metric_id, &TEST_TAG_LIST_INT, 60.0), 0);
fieldstat_free(instance);
}
int main(int argc, char *argv[])
{
testing::InitGoogleTest(&argc, argv);
return RUN_ALL_TESTS();
}
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