Refactor namespaces part 1 (#817)

Part 1 of refactoring effort

unittests/data/cassandra/RetryPolicyTests.cpp

@@ -0,0 +1,83 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of clio: https://github.com/XRPLF/clio
+    Copyright (c) 2023, the clio developers.
+
+    Permission to use, copy, modify, and distribute this software for any
+    purpose with or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL,  DIRECT,  INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#include <util/Fixtures.h>
+
+#include <data/cassandra/Error.h>
+#include <data/cassandra/impl/RetryPolicy.h>
+
+#include <gtest/gtest.h>
+
+using namespace data::cassandra;
+using namespace data::cassandra::detail;
+using namespace testing;
+
+class BackendCassandraRetryPolicyTest : public SyncAsioContextTest
+{
+};
+
+TEST_F(BackendCassandraRetryPolicyTest, ShouldRetryAlwaysTrue)
+{
+    auto retryPolicy = ExponentialBackoffRetryPolicy{ctx};
+    EXPECT_TRUE(retryPolicy.shouldRetry(CassandraError{"timeout", CASS_ERROR_LIB_REQUEST_TIMED_OUT}));
+    EXPECT_TRUE(retryPolicy.shouldRetry(CassandraError{"invalid data", CASS_ERROR_LIB_INVALID_DATA}));
+    EXPECT_TRUE(retryPolicy.shouldRetry(CassandraError{"invalid query", CASS_ERROR_SERVER_INVALID_QUERY}));
+
+    // this policy actually always returns true
+    auto const err = CassandraError{"ok", CASS_OK};
+    for (auto i = 0; i < 1024; ++i)
+    {
+        EXPECT_TRUE(retryPolicy.shouldRetry(err));
+    }
+}
+
+TEST_F(BackendCassandraRetryPolicyTest, CheckComputedBackoffDelayIsCorrect)
+{
+    auto retryPolicy = ExponentialBackoffRetryPolicy{ctx};
+    EXPECT_EQ(retryPolicy.calculateDelay(0).count(), 1);
+    EXPECT_EQ(retryPolicy.calculateDelay(1).count(), 2);
+    EXPECT_EQ(retryPolicy.calculateDelay(2).count(), 4);
+    EXPECT_EQ(retryPolicy.calculateDelay(3).count(), 8);
+    EXPECT_EQ(retryPolicy.calculateDelay(4).count(), 16);
+    EXPECT_EQ(retryPolicy.calculateDelay(5).count(), 32);
+    EXPECT_EQ(retryPolicy.calculateDelay(6).count(), 64);
+    EXPECT_EQ(retryPolicy.calculateDelay(7).count(), 128);
+    EXPECT_EQ(retryPolicy.calculateDelay(8).count(), 256);
+    EXPECT_EQ(retryPolicy.calculateDelay(9).count(), 512);
+    EXPECT_EQ(retryPolicy.calculateDelay(10).count(), 1024);
+    EXPECT_EQ(retryPolicy.calculateDelay(11).count(),
+              1024);  // 10 is max, same after that
+}
+
+TEST_F(BackendCassandraRetryPolicyTest, RetryCorrectlyExecuted)
+{
+    auto callCount = std::atomic_int{0};
+    auto work = std::optional<boost::asio::io_context::work>{ctx};
+    auto retryPolicy = ExponentialBackoffRetryPolicy{ctx};
+
+    retryPolicy.retry([&callCount]() { ++callCount; });
+    retryPolicy.retry([&callCount]() { ++callCount; });
+    retryPolicy.retry([&callCount, &work]() {
+        ++callCount;
+        work.reset();
+    });
+
+    ctx.run();
+    ASSERT_EQ(callCount, 3);
+}