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-rw-r--r--test/core/statistics/hash_table_test.cc286
1 files changed, 286 insertions, 0 deletions
diff --git a/test/core/statistics/hash_table_test.cc b/test/core/statistics/hash_table_test.cc
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+++ b/test/core/statistics/hash_table_test.cc
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+/*
+ *
+ * Copyright 2015 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "src/core/ext/census/hash_table.h"
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/time.h>
+#include "src/core/lib/support/murmur_hash.h"
+#include "src/core/lib/support/string.h"
+#include "test/core/util/test_config.h"
+
+static uint64_t hash64(const void* k) {
+ size_t len = strlen(k);
+ uint64_t higher = gpr_murmur_hash3((const char*)k, len / 2, 0);
+ return higher << 32 |
+ gpr_murmur_hash3((const char*)(k) + len / 2, len - len / 2, 0);
+}
+
+static int cmp_str_keys(const void* k1, const void* k2) {
+ return strcmp((const char*)k1, (const char*)k2);
+}
+
+static uint64_t force_collision(const void* k) {
+ return (1997 + hash64(k) % 3);
+}
+
+static void free_data(void* data) { gpr_free(data); }
+
+/* Basic tests that empty hash table can be created and destroyed. */
+static void test_create_table(void) {
+ /* Create table with uint64 key type */
+ census_ht* ht = NULL;
+ census_ht_option ht_options = {
+ CENSUS_HT_UINT64, 1999, NULL, NULL, NULL, NULL};
+ ht = census_ht_create(&ht_options);
+ GPR_ASSERT(ht != NULL);
+ GPR_ASSERT(census_ht_get_size(ht) == 0);
+ census_ht_destroy(ht);
+ /* Create table with pointer key type */
+ ht = NULL;
+ ht_options.key_type = CENSUS_HT_POINTER;
+ ht_options.hash = &hash64;
+ ht_options.compare_keys = &cmp_str_keys;
+ ht = census_ht_create(&ht_options);
+ GPR_ASSERT(ht != NULL);
+ GPR_ASSERT(census_ht_get_size(ht) == 0);
+ census_ht_destroy(ht);
+}
+
+static void test_table_with_int_key(void) {
+ census_ht_option opt = {CENSUS_HT_UINT64, 7, NULL, NULL, NULL, NULL};
+ census_ht* ht = census_ht_create(&opt);
+ uint64_t i = 0;
+ uint64_t sum_of_keys = 0;
+ size_t num_elements;
+ census_ht_kv* elements = NULL;
+ GPR_ASSERT(ht != NULL);
+ GPR_ASSERT(census_ht_get_size(ht) == 0);
+ elements = census_ht_get_all_elements(ht, &num_elements);
+ GPR_ASSERT(num_elements == 0);
+ GPR_ASSERT(elements == NULL);
+ for (i = 0; i < 20; ++i) {
+ census_ht_key key;
+ key.val = i;
+ census_ht_insert(ht, key, (void*)(intptr_t)i);
+ GPR_ASSERT(census_ht_get_size(ht) == i + 1);
+ }
+ for (i = 0; i < 20; i++) {
+ uint64_t* val = NULL;
+ census_ht_key key;
+ key.val = i;
+ val = static_cast<uint64_t*>(census_ht_find(ht, key));
+ GPR_ASSERT(val == (void*)(intptr_t)i);
+ }
+ elements = census_ht_get_all_elements(ht, &num_elements);
+ GPR_ASSERT(elements != NULL);
+ GPR_ASSERT(num_elements == 20);
+ for (i = 0; i < num_elements; i++) {
+ sum_of_keys += elements[i].k.val;
+ }
+ GPR_ASSERT(sum_of_keys == 190);
+ gpr_free(elements);
+ census_ht_destroy(ht);
+}
+
+/* Test that there is no memory leak when keys and values are owned by table. */
+static void test_value_and_key_deleter(void) {
+ census_ht_option opt = {CENSUS_HT_POINTER, 7, &hash64,
+ &cmp_str_keys, &free_data, &free_data};
+ census_ht* ht = census_ht_create(&opt);
+ census_ht_key key;
+ char* val = NULL;
+ char* val2 = NULL;
+ key.ptr = gpr_malloc(100);
+ val = static_cast<char*>(gpr_malloc(10));
+ strcpy(val, "value");
+ strcpy(key.ptr, "some string as a key");
+ GPR_ASSERT(ht != NULL);
+ GPR_ASSERT(census_ht_get_size(ht) == 0);
+ census_ht_insert(ht, key, val);
+ GPR_ASSERT(census_ht_get_size(ht) == 1);
+ val = static_cast<char*>(census_ht_find(ht, key));
+ GPR_ASSERT(val != NULL);
+ GPR_ASSERT(strcmp(val, "value") == 0);
+ /* Insert same key different value, old value is overwritten. */
+ val2 = static_cast<char*>(gpr_malloc(10));
+ strcpy(val2, "v2");
+ census_ht_insert(ht, key, val2);
+ GPR_ASSERT(census_ht_get_size(ht) == 1);
+ val2 = static_cast<char*>(census_ht_find(ht, key));
+ GPR_ASSERT(val2 != NULL);
+ GPR_ASSERT(strcmp(val2, "v2") == 0);
+ census_ht_destroy(ht);
+}
+
+/* Test simple insert and erase operations. */
+static void test_simple_add_and_erase(void) {
+ census_ht_option opt = {CENSUS_HT_UINT64, 7, NULL, NULL, NULL, NULL};
+ census_ht* ht = census_ht_create(&opt);
+ GPR_ASSERT(ht != NULL);
+ GPR_ASSERT(census_ht_get_size(ht) == 0);
+ {
+ census_ht_key key;
+ int val = 3;
+ key.val = 2;
+ census_ht_insert(ht, key, (void*)&val);
+ GPR_ASSERT(census_ht_get_size(ht) == 1);
+ census_ht_erase(ht, key);
+ GPR_ASSERT(census_ht_get_size(ht) == 0);
+ /* Erasing a key from an empty table should be noop. */
+ census_ht_erase(ht, key);
+ GPR_ASSERT(census_ht_get_size(ht) == 0);
+ /* Erasing a non-existant key from a table should be noop. */
+ census_ht_insert(ht, key, (void*)&val);
+ key.val = 3;
+ census_ht_insert(ht, key, (void*)&val);
+ key.val = 9;
+ census_ht_insert(ht, key, (void*)&val);
+ GPR_ASSERT(census_ht_get_size(ht) == 3);
+ key.val = 1;
+ census_ht_erase(ht, key);
+ /* size unchanged after deleting non-existant key. */
+ GPR_ASSERT(census_ht_get_size(ht) == 3);
+ /* size decrease by 1 after deleting an existant key. */
+ key.val = 2;
+ census_ht_erase(ht, key);
+ GPR_ASSERT(census_ht_get_size(ht) == 2);
+ }
+ census_ht_destroy(ht);
+}
+
+static void test_insertion_and_deletion_with_high_collision_rate(void) {
+ census_ht_option opt = {CENSUS_HT_POINTER, 13, &force_collision,
+ &cmp_str_keys, NULL, NULL};
+ census_ht* ht = census_ht_create(&opt);
+ char key_str[1000][GPR_LTOA_MIN_BUFSIZE];
+ uint64_t val = 0;
+ unsigned i = 0;
+ for (i = 0; i < 1000; i++) {
+ census_ht_key key;
+ key.ptr = key_str[i];
+ gpr_ltoa(i, key_str[i]);
+ census_ht_insert(ht, key, (void*)(&val));
+ gpr_log(GPR_INFO, "%d\n", i);
+ GPR_ASSERT(census_ht_get_size(ht) == (i + 1));
+ }
+ for (i = 0; i < 1000; i++) {
+ census_ht_key key;
+ key.ptr = key_str[i];
+ census_ht_erase(ht, key);
+ GPR_ASSERT(census_ht_get_size(ht) == (999 - i));
+ }
+ census_ht_destroy(ht);
+}
+
+static void test_table_with_string_key(void) {
+ census_ht_option opt = {CENSUS_HT_POINTER, 7, &hash64,
+ &cmp_str_keys, NULL, NULL};
+ census_ht* ht = census_ht_create(&opt);
+ const char* keys[] = {
+ "k1", "a", "000", "apple", "banana_a_long_long_long_banana",
+ "%$", "111", "foo", "b"};
+ const int vals[] = {0, 1, 2, 3, 4, 5, 6, 7, 8};
+ int i = 0;
+ GPR_ASSERT(ht != NULL);
+ GPR_ASSERT(census_ht_get_size(ht) == 0);
+ for (i = 0; i < 9; i++) {
+ census_ht_key key;
+ key.ptr = (void*)(keys[i]);
+ census_ht_insert(ht, key, (void*)(vals + i));
+ }
+ GPR_ASSERT(census_ht_get_size(ht) == 9);
+ for (i = 0; i < 9; i++) {
+ census_ht_key key;
+ int* val_ptr;
+ key.ptr = (void*)(keys[i]);
+ val_ptr = static_cast<int*>(census_ht_find(ht, key));
+ GPR_ASSERT(*val_ptr == vals[i]);
+ }
+ {
+ /* inserts duplicate keys */
+ census_ht_key key;
+ int* val_ptr = NULL;
+ key.ptr = (void*)(keys[2]);
+ census_ht_insert(ht, key, (void*)(vals + 8));
+ /* expect value to be over written by new insertion */
+ GPR_ASSERT(census_ht_get_size(ht) == 9);
+ val_ptr = static_cast<int*>(census_ht_find(ht, key));
+ GPR_ASSERT(*val_ptr == vals[8]);
+ }
+ for (i = 0; i < 9; i++) {
+ census_ht_key key;
+ int* val_ptr;
+ uint32_t expected_tbl_sz = 9 - i;
+ GPR_ASSERT(census_ht_get_size(ht) == expected_tbl_sz);
+ key.ptr = (void*)(keys[i]);
+ val_ptr = static_cast<int*>(census_ht_find(ht, key));
+ GPR_ASSERT(val_ptr != NULL);
+ census_ht_erase(ht, key);
+ GPR_ASSERT(census_ht_get_size(ht) == expected_tbl_sz - 1);
+ val_ptr = static_cast<int*>(census_ht_find(ht, key));
+ GPR_ASSERT(val_ptr == NULL);
+ }
+ census_ht_destroy(ht);
+}
+
+static void test_insertion_with_same_key(void) {
+ census_ht_option opt = {CENSUS_HT_UINT64, 11, NULL, NULL, NULL, NULL};
+ census_ht* ht = census_ht_create(&opt);
+ census_ht_key key;
+ const char vals[] = {'a', 'b', 'c'};
+ char* val_ptr;
+ key.val = 3;
+ census_ht_insert(ht, key, (void*)&(vals[0]));
+ GPR_ASSERT(census_ht_get_size(ht) == 1);
+ val_ptr = (char*)census_ht_find(ht, key);
+ GPR_ASSERT(val_ptr != NULL);
+ GPR_ASSERT(*val_ptr == 'a');
+ key.val = 4;
+ val_ptr = (char*)census_ht_find(ht, key);
+ GPR_ASSERT(val_ptr == NULL);
+ key.val = 3;
+ census_ht_insert(ht, key, (void*)&(vals[1]));
+ GPR_ASSERT(census_ht_get_size(ht) == 1);
+ val_ptr = (char*)census_ht_find(ht, key);
+ GPR_ASSERT(val_ptr != NULL);
+ GPR_ASSERT(*val_ptr == 'b');
+ census_ht_insert(ht, key, (void*)&(vals[2]));
+ GPR_ASSERT(census_ht_get_size(ht) == 1);
+ val_ptr = (char*)census_ht_find(ht, key);
+ GPR_ASSERT(val_ptr != NULL);
+ GPR_ASSERT(*val_ptr == 'c');
+ census_ht_destroy(ht);
+}
+
+int main(int argc, char** argv) {
+ grpc_test_init(argc, argv);
+ test_create_table();
+ test_simple_add_and_erase();
+ test_table_with_int_key();
+ test_table_with_string_key();
+ test_value_and_key_deleter();
+ test_insertion_with_same_key();
+ test_insertion_and_deletion_with_high_collision_rate();
+ return 0;
+}
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