Genymobile/scrcpy

Client tests are 12 assert-based C programs in app/tests, each compiled as a Meson test() executable — but only when buildtype=debug so asserts execute. They cover adb parsing, binary helpers, CLI parsing, control-message serialization, device-message deserialization, orientation parsing, string/strbuf/vecdeque/vector containers and Windows command building. Server tests are JUnit4 in server/src/test covering ControlMessageReader, DeviceMessageWriter, CodecOptions, BinarySearch, Binary, CommandParser and StringUtils. CI runs release/test_server.sh (gradle test) and release/test_client.sh (meson test) plus a build-without-gradle check; there is no end-to-end socket-protocol or UI test coverage.

• app/tests contains 12 test files (test_adb_parser, test_audiobuf, test_binary, test_cli, test_command_windows, test_control_msg_serialize, test_device_msg_deserialize, test_orientation, test_str, test_strbuf, test_vecdeque, test_vector) registered as meson test() targets.
  app/meson.build#L222-298
• Tests are only built when get_option('buildtype') == 'debug', because the tests are plain assert()-based programs compiled with -DSC_TEST.
  app/meson.build#L224-297app/tests/test_control_msg_serialize.c#L9-32
• Serialization is tested at the byte level: test_control_msg_serialize asserts exact serialized layouts (e.g. INJECT_KEYCODE == 14 bytes with specific keycode/metastate encoding).
  app/tests/test_control_msg_serialize.c#L9-52
• Server unit tests (JUnit 4.13.2) live in server/src/test/java under control/, model/, util/: ControlMessageReaderTest, DeviceMessageWriterTest, CodecOptionsTest, BinarySearchTest, BinaryTest, CommandParserTest, StringUtilsTest.
  server/build.gradleserver/src/test/java/com/genymobile/scrcpy/control/ControlMessageReaderTest.java
• CI job test-scrcpy-server runs release/test_server.sh on ubuntu-latest with JDK 17 (zulu) using native gradle.
  .github/workflows/release.yml#L14-29
• CI job test-client installs meson/ffmpeg/SDL deps (SDL3 built by app/deps/sdl.sh since it is not packaged in Ubuntu) and runs release/test_client.sh.
  .github/workflows/release.yml#L69-98release/test_client.sh
• A dedicated CI job builds the server without Gradle via server/build_without_gradle.sh, keeping the manual javac/d8 path tested.
  .github/workflows/release.yml#L54-67server/build_without_gradle.sh
• Both sides test the same protocol independently (client serializer tests vs server reader tests) but no test exercises a real socket round-trip between client and server; protocol drift would only be caught manually. (inferred)
  app/tests/test_control_msg_serialize.cserver/src/test/java/com/genymobile/scrcpy/control/ControlMessageReaderTest.java
• No tests exist for demuxer, decoder, recorder, screen, server.c, adb process management or any SDL/audio playback path — the largest files (cli.c, screen.c, recorder.c, server.c) are exercised only manually or via release scripts. (inferred)
  app/meson.build#L225-297
• test_cli compiles the real cli.c+options.c, so option-table regressions (missing longopt, bad argdesc) are caught in CI.
  app/meson.build#L242-251app/tests/test_cli.c