build/tracer/BUILD.gn

# Copyright 2020 The Fuchsia Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

import("//build/python/python_host_test.gni")

group("tests") {
  testonly = true

  deps = [
    ":action_tracer_test($host_toolchain)",
    ":output_cacher_test($host_toolchain)",
    ":tracer_test",

    # There are known platforms where fsatrace_test fails.
    # TODO(fxb/70879): enable when test passes on all of them
    # ":fsatrace_test",
  ]
}

python_host_test("action_tracer_test") {
  main_source = "action_tracer_test.py"
  sources = [ "action_tracer.py" ]
}

# 1. Turn on trace_action:
# $ fx set ... --args=build_should_trace_actions=true
# 2. Delete the output files to ensure that this action will run:
# $ rm -rf out/default/obj/build/tracer
# 3. Comment out either the `inputs`, or the second line of `outputs` below.
# 4. Build.
# $ fx build obj/build/tracer/tracer_test_output_1.txt
# You should see an error for the target below!
#
# You can also induce an error by commenting out one of the output-producing
# lines in tracer_test.sh.
action("tracer_test") {
  script = "tracer_test.sh"

  inputs = [ "tracer_test_input.txt" ]

  outputs = [
    "$target_out_dir/tracer_test_output_1.txt",
    "$target_out_dir/tracer_test_output_2.txt",
    "$target_out_dir/tracer_test_output_3.txt",
  ]

  args = [
    rebase_path(inputs[0], root_build_dir),
    rebase_path(outputs[0], root_build_dir),
    rebase_path(outputs[1], root_build_dir),
    rebase_path(outputs[2], root_build_dir),
  ]
}

# Test that fsatrace is working properly on the host.
# If this fails, tracing is not capturing file accesses properly,
# and enabling action tracing is providing no coverage or diagnostic value.
action("fsatrace_test") {
  script = "fsatrace_test.sh"
  inputs = [ "//prebuilt/fsatrace/fsatrace" ]
  outputs = [ "$target_out_dir/fsatrace_test_stamp.txt" ]
  args = [
    rebase_path(inputs[0], root_build_dir),
    rebase_path(outputs[0], root_build_dir),
  ]
}

python_host_test("output_cacher_test") {
  main_source = "output_cacher_test.py"
  sources = [ "output_cacher.py" ]
}