| /* |
| * |
| * Copyright 2016, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| #include "src/core/support/backoff.h" |
| |
| #include <grpc/support/log.h> |
| |
| #include "test/core/util/test_config.h" |
| |
| static void test_constant_backoff(void) { |
| gpr_backoff backoff; |
| gpr_backoff_init(&backoff, 1.0, 0.0, 1000, 1000); |
| |
| gpr_timespec now = gpr_time_0(GPR_TIMESPAN); |
| gpr_timespec next = gpr_backoff_begin(&backoff, now); |
| GPR_ASSERT(gpr_time_to_millis(gpr_time_sub(next, now)) == 1000); |
| for (int i = 0; i < 10000; i++) { |
| next = gpr_backoff_step(&backoff, now); |
| GPR_ASSERT(gpr_time_to_millis(gpr_time_sub(next, now)) == 1000); |
| now = next; |
| } |
| } |
| |
| static void test_no_jitter_backoff(void) { |
| gpr_backoff backoff; |
| gpr_backoff_init(&backoff, 2.0, 0.0, 1, 513); |
| |
| gpr_timespec now = gpr_time_0(GPR_TIMESPAN); |
| gpr_timespec next = gpr_backoff_begin(&backoff, now); |
| GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(1, GPR_TIMESPAN), next) == 0); |
| now = next; |
| next = gpr_backoff_step(&backoff, now); |
| GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(3, GPR_TIMESPAN), next) == 0); |
| now = next; |
| next = gpr_backoff_step(&backoff, now); |
| GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(7, GPR_TIMESPAN), next) == 0); |
| now = next; |
| next = gpr_backoff_step(&backoff, now); |
| GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(15, GPR_TIMESPAN), next) == 0); |
| now = next; |
| next = gpr_backoff_step(&backoff, now); |
| GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(31, GPR_TIMESPAN), next) == 0); |
| now = next; |
| next = gpr_backoff_step(&backoff, now); |
| GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(63, GPR_TIMESPAN), next) == 0); |
| now = next; |
| next = gpr_backoff_step(&backoff, now); |
| GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(127, GPR_TIMESPAN), next) == 0); |
| now = next; |
| next = gpr_backoff_step(&backoff, now); |
| GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(255, GPR_TIMESPAN), next) == 0); |
| now = next; |
| next = gpr_backoff_step(&backoff, now); |
| GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(511, GPR_TIMESPAN), next) == 0); |
| now = next; |
| next = gpr_backoff_step(&backoff, now); |
| GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(1023, GPR_TIMESPAN), next) == 0); |
| now = next; |
| next = gpr_backoff_step(&backoff, now); |
| GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(1536, GPR_TIMESPAN), next) == 0); |
| now = next; |
| next = gpr_backoff_step(&backoff, now); |
| GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(2049, GPR_TIMESPAN), next) == 0); |
| now = next; |
| next = gpr_backoff_step(&backoff, now); |
| GPR_ASSERT(gpr_time_cmp(gpr_time_from_millis(2562, GPR_TIMESPAN), next) == 0); |
| } |
| |
| int main(int argc, char **argv) { |
| grpc_test_init(argc, argv); |
| gpr_time_init(); |
| |
| test_constant_backoff(); |
| test_no_jitter_backoff(); |
| |
| return 0; |
| } |