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# Copyright 2013 The Flutter 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/compiled_action.gni")
import("//flutter/build/dart/rules.gni")
import("//flutter/common/config.gni")
is_aot_test =
flutter_runtime_mode == "profile" || flutter_runtime_mode == "release"
# Build unit tests when any of the following are true:
# * host_toolchain: non-cross-compile, so we can run tests on the host.
# * is_mac: arm64 builds can run x64 binaries.
# * is_fuchsia: build unittests for testing on device.
declare_args() {
enable_unittests = current_toolchain == host_toolchain || is_fuchsia || is_mac
}
# Creates a translation unit that defines the flutter::testing::GetFixturesPath
# method that tests can use to locate their fixtures.
#
# Arguments
# assets_dir (required): The assets directory
template("fixtures_location") {
testonly = true
assert(defined(invoker.assets_dir), "The assets directory.")
location_path = rebase_path(invoker.assets_dir)
testing_assets_path = rebase_path("$root_out_dir/gen/flutter/testing/assets")
source_path = rebase_path("//")
# Array of source lines. We use a list to ensure a trailing newline is
# emitted by write_file() to comply with -Wnewline-eof.
location_source = [
"namespace flutter { namespace testing { ",
"const char* GetSourcePath() {return \"$source_path\";} ",
"const char* GetFixturesPath() {return \"$location_path\";} ",
"const char* GetTestingAssetsPath() {return \"$testing_assets_path\";} ",
"}}",
]
location_source_path = "$target_gen_dir/_fl_$target_name.cc"
write_file(location_source_path, location_source)
source_set(target_name) {
public = []
sources = [ location_source_path ]
}
}
# Generates the Dart kernel snapshot.
#
# Arguments
# dart_main (required): The Main Dart file.
#
# dart_kernel (required): The path to the output kernel snapshot in the out
# directory.
template("dart_snapshot_kernel") {
testonly = true
assert(defined(invoker.dart_main), "The Dart Main file must be specified")
assert(defined(invoker.dart_kernel),
"The Dart Kernel file location must be specified")
args = []
if (flutter_runtime_mode == "release" ||
flutter_runtime_mode == "jit_release") {
args += [ "-Ddart.vm.product=true" ]
}
if (is_aot_test) {
args += [
"--aot",
# type flow analysis
"--tfa",
]
}
flutter_frontend_server(target_name) {
testonly = true
main_dart = invoker.dart_main
kernel_output = invoker.dart_kernel
extra_args = args
}
}
# Generates an AOT snapshot from a kernel snapshot.
#
# Arguments:
#
# dart_kernel (required): The path to the kernel snapshot.
#
# dart_elf_filename (required): The filename of the AOT ELF snapshot.
template("dart_snapshot_aot") {
testonly = true
assert(defined(invoker.dart_kernel),
"The Dart Kernel file location must be specified")
assert(defined(invoker.dart_elf_filename),
"The main Dart ELF filename must be specified.")
compiled_action(target_name) {
testonly = true
tool = "$dart_src/runtime/bin:gen_snapshot"
pool = "//flutter/build/dart:dart_pool"
inputs = [ invoker.dart_kernel ]
# Custom ELF loader is used for Mac and Windows.
elf_object = "$target_gen_dir/assets/${invoker.dart_elf_filename}"
loading_unit_manifest = "$target_gen_dir/assets/loading_unit_manifest.json"
outputs = [ elf_object ]
args = [
"--deterministic",
"--snapshot_kind=app-aot-elf",
"--loading_unit_manifest=" + rebase_path(loading_unit_manifest),
"--elf=" + rebase_path(elf_object),
rebase_path(invoker.dart_kernel),
]
forward_variables_from(invoker, [ "deps" ])
}
}
# Generates a kernel or AOT snapshot as necessary from the main Dart file.
# Other Dart dependencies referenced by that main Dart file will be tracked.
#
# Arguments:
#
# dart_main (required): The path to the main Dart file.
#
# dart_kernel_filename (required): The filename of the kernel blob.
#
# dart_elf_filename (required): The filename of the AOT ELF snapshot only if is_aot_test is true.
template("dart_snapshot") {
assert(defined(invoker.dart_main), "The main Dart file must be specified.")
assert(defined(invoker.dart_kernel_filename),
"The main Dart kernel filename must be specified.")
testonly = true
dart_snapshot_kernel_target_name = "_dsk_$target_name"
dart_snapshot_kernel_path =
"$target_gen_dir/assets/${invoker.dart_kernel_filename}"
dart_snapshot_kernel(dart_snapshot_kernel_target_name) {
dart_main = invoker.dart_main
dart_kernel = dart_snapshot_kernel_path
}
snapshot_deps = []
snapshot_public_deps = [ ":$dart_snapshot_kernel_target_name" ]
if (is_aot_test) {
assert(defined(invoker.dart_elf_filename),
"The main Dart ELF filename must be specified.")
dart_snapshot_aot_target_name = "_dsa_$target_name"
dart_snapshot_aot(dart_snapshot_aot_target_name) {
dart_kernel = dart_snapshot_kernel_path
dart_elf_filename = invoker.dart_elf_filename
deps = [ ":$dart_snapshot_kernel_target_name" ]
}
snapshot_deps += [ ":$dart_snapshot_aot_target_name" ]
}
group(target_name) {
testonly = true
deps = snapshot_deps
public_deps = snapshot_public_deps
}
}
# Copies a (potentially empty) list of fixtures to the fixtures directory for
# the unit test.
#
# Arguments:
#
# fixtures (required): The list of fixtures to copy.
#
# dest (optional): When specified, the fixtures are placed under an
# 'assets' subdirectory of this path rather than an
# 'assets' subdirectory of target_gen_dir.
template("copy_fixtures") {
testonly = true
assert(defined(invoker.fixtures), "The test fixtures must be specified.")
dest = target_gen_dir
if (defined(invoker.dest)) {
dest = invoker.dest
}
has_fixtures = false
foreach(fixture, invoker.fixtures) {
has_fixtures = true
}
if (has_fixtures) {
copy(target_name) {
sources = invoker.fixtures
outputs = [ "$dest/assets/{{source_file_part}}" ]
forward_variables_from(invoker, [ "deps" ])
}
} else {
group(target_name) {
# The copy target cannot accept an empty list.
}
}
}
# Specifies the fixtures to copy to a location known by the specific unit test.
# Test executable can only depend on one such target. You can use either one of
# both arguments to expand this template. If you have none, then you'll see the
# unused invoker scope error. In such cases specify the fixtures using an empty
# array.
#
# The targets which generate the outputs from these test fixtures (e.g. the
# Dart kernel snapshot) are exposed as public dependencies of the test fixture
# target. This is so that users can depend on the test fixture target directly
# and be able to access the generated outputs without needing to know about the
# internal dependency structure generated by this template.
#
# Arguments:
#
# fixtures (optional): The list of test fixtures. An empty list may be
# specified.
#
# dart_main (optional): The path to the main Dart file. If specified, it is
# snapshotted.
#
# use_target_as_artifact_prefix(optional): If true, adds the target name as
# prefix of the kernel and AOT ELF snapshot filename.
#
# dest (optional): When specified, the fixtures are placed under an
# 'assets' subdirectory of this path rather than an
# 'assets' subdirectory of target_gen_dir.
template("test_fixtures") {
dest = target_gen_dir
if (defined(invoker.dest)) {
dest = invoker.dest
}
# Not all paths use 'dest'
not_needed([ "dest" ])
# Even if no fixtures are present, the location of the fixtures directory
# must always be known to tests.
fixtures_location_target_name = "_fl_$target_name"
fixtures_location(fixtures_location_target_name) {
if (is_fuchsia) {
assets_dir = "/pkg/data/assets"
} else {
assets_dir = "$dest/assets"
}
}
test_deps = [ ":$fixtures_location_target_name" ]
test_public_deps = []
# If the fixtures are specified, copy them to the assets directory.
if (defined(invoker.fixtures)) {
copy_fixtures_target_name = "_cf_$target_name"
copy_fixtures(copy_fixtures_target_name) {
fixtures = invoker.fixtures
dest = dest
forward_variables_from(invoker, [ "deps" ])
}
test_public_deps += [ ":$copy_fixtures_target_name" ]
}
# If a Dart file is specified, snapshot it and place it in the generated
# assets directory.
if (defined(invoker.dart_main)) {
if (defined(invoker.use_target_as_artifact_prefix) &&
invoker.use_target_as_artifact_prefix) {
artifact_prefix = "${target_name}_"
} else {
artifact_prefix = ""
}
dart_snapshot_target_name = "_ds_$target_name"
dart_snapshot(dart_snapshot_target_name) {
dart_main = invoker.dart_main
dart_kernel_filename = "${artifact_prefix}kernel_blob.bin"
if (is_aot_test) {
dart_elf_filename = "${artifact_prefix}app_elf_snapshot.so"
}
}
test_public_deps += [ ":$dart_snapshot_target_name" ]
}
group(target_name) {
testonly = true
deps = test_deps
public_deps = test_public_deps
}
}