Split benchmarks and test tools into separate targets.

This lets us remove main() from snappy_bench.cc and snappy_unittest.cc,
which simplifies integrating these tests and benchmarks with other
suites.

PiperOrigin-RevId: 347857427

snappy_test_data.h

@@ -0,0 +1,68 @@
+// Copyright 2020 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.
+//
+// List of test case files.
+
+#ifndef THIRD_PARTY_SNAPPY_SNAPPY_TEST_DATA_H__
+#define THIRD_PARTY_SNAPPY_SNAPPY_TEST_DATA_H__
+
+#include <cstddef>
+#include <string>
+
+namespace snappy {
+
+std::string ReadTestDataFile(const char* base, size_t size_limit);
+
+// TODO: Replace anonymous namespace with inline variable when we can
+//               rely on C++17.
+namespace {
+
+constexpr struct {
+  const char* label;
+  const char* filename;
+  size_t size_limit;
+} kTestDataFiles[] = {
+  { "html", "html", 0 },
+  { "urls", "urls.10K", 0 },
+  { "jpg", "fireworks.jpeg", 0 },
+  { "jpg_200", "fireworks.jpeg", 200 },
+  { "pdf", "paper-100k.pdf", 0 },
+  { "html4", "html_x_4", 0 },
+  { "txt1", "alice29.txt", 0 },
+  { "txt2", "asyoulik.txt", 0 },
+  { "txt3", "lcet10.txt", 0 },
+  { "txt4", "plrabn12.txt", 0 },
+  { "pb", "geo.protodata", 0 },
+  { "gaviota", "kppkn.gtb", 0 },
+};
+
+}  // namespace
+
+}  // namespace snappy
+
+#endif  // THIRD_PARTY_SNAPPY_SNAPPY_TEST_DATA_H__