1 files changed, 99 insertions, 0 deletions
diff --git a/src/seastar/tests/unit/simple_stream_test.cc b/src/seastar/tests/unit/simple_stream_test.cc
new file mode 100644
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+++ b/src/seastar/tests/unit/simple_stream_test.cc
@@ -0,0 +1,99 @@
+/*
+ * This file is open source software, licensed to you under the terms
+ * of the Apache License, Version 2.0 (the "License").  See the NOTICE file
+ * distributed with this work for additional information regarding copyright
+ * ownership.  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.
+ */
+/*
+ * Copyright (C) 2018 ScyllaDB Ltd.
+ */
+
+#define BOOST_TEST_MODULE simple_stream
+
+#include <boost/test/included/unit_test.hpp>
+#include <seastar/core/simple-stream.hh>
+
+using namespace seastar;
+
+template<typename Input, typename Output>
+static void write_read_test(Input in, Output out)
+{
+    auto aa = std::vector<char>(4, 'a');
+    auto bb = std::vector<char>(3, 'b');
+    auto cc = std::vector<char>(2, 'c');
+
+    out.write(aa.data(), aa.size());
+    out.fill('b', 3);
+
+    BOOST_CHECK_THROW(out.fill(' ', 3), std::out_of_range);
+    BOOST_CHECK_THROW(out.write("   ", 3), std::out_of_range);
+
+    out.write(cc.data(), cc.size());
+
+    BOOST_CHECK_THROW(out.fill(' ', 1), std::out_of_range);
+    BOOST_CHECK_THROW(out.write(" ", 1), std::out_of_range);
+
+    auto actual_aa = std::vector<char>(4);
+    in.read(actual_aa.data(), actual_aa.size());
+    BOOST_CHECK_EQUAL(aa, actual_aa);
+
+    auto actual_bb = std::vector<char>(3);
+    in.read(actual_bb.data(), actual_bb.size());
+    BOOST_CHECK_EQUAL(bb, actual_bb);
+
+    actual_aa.resize(1024);
+    BOOST_CHECK_THROW(in.read(actual_aa.data(), actual_aa.size()), std::out_of_range);
+
+    auto actual_cc = std::vector<char>(2);
+    in.read(actual_cc.data(), actual_cc.size());
+    BOOST_CHECK_EQUAL(cc, actual_cc);
+
+    BOOST_CHECK_THROW(in.read(actual_aa.data(), 1), std::out_of_range);
+}
+
+BOOST_AUTO_TEST_CASE(simple_write_read_test) {
+    auto buf = temporary_buffer<char>(9);
+
+    write_read_test(simple_memory_input_stream(buf.get(), buf.size()),
+                    simple_memory_output_stream(buf.get_write(), buf.size()));
+
+    std::fill_n(buf.get_write(), buf.size(), 'x');
+
+    auto out = simple_memory_output_stream(buf.get_write(), buf.size());
+    write_read_test(out.to_input_stream(), out);
+}
+
+BOOST_AUTO_TEST_CASE(fragmented_write_read_test) {
+    static constexpr size_t total_size = 9;
+
+    auto bufs = std::vector<temporary_buffer<char>>();
+    using iterator_type = std::vector<temporary_buffer<char>>::iterator;
+
+    auto test = [&] {
+        write_read_test(fragmented_memory_input_stream<iterator_type>(bufs.begin(), total_size),
+                        fragmented_memory_output_stream<iterator_type>(bufs.begin(), total_size));
+
+        auto out = fragmented_memory_output_stream<iterator_type>(bufs.begin(), total_size);
+        write_read_test(out.to_input_stream(), out);
+    };
+
+    bufs.emplace_back(total_size);
+    test();
+
+    bufs.clear();
+    for (auto i = 0u; i < total_size; i++) {
+        bufs.emplace_back(1);
+    }
+    test();
+}