| # Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| # This file is meant to be included into an target to create a unittest that |
| # invokes a set of no-compile tests. A no-compile test is a test that asserts |
| # a particular construct will not compile. |
| # |
| # Also see: |
| # http://dev.chromium.org/developers/testing/no-compile-tests |
| # |
| # To use this, create a gyp target with the following form: |
| # |
| # import("//build/nocompile.gni") |
| # nocompile_test("my_module_nc_unittests") { |
| # sources = [ |
| # 'nc_testset_1.nc', |
| # 'nc_testset_2.nc', |
| # ] |
| # } |
| # |
| # The .nc files are C++ files that contain code we wish to assert will not |
| # compile. Each individual test case in the file should be put in its own |
| # #ifdef section. The expected output should be appended with a C++-style |
| # comment that has a python list of regular expressions. This will likely |
| # be greater than 80-characters. Giving a solid expected output test is |
| # important so that random compile failures do not cause the test to pass. |
| # |
| # Example .nc file: |
| # |
| # #if defined(TEST_NEEDS_SEMICOLON) // [r"expected ',' or ';' at end of input"] |
| # |
| # int a = 1 |
| # |
| # #elif defined(TEST_NEEDS_CAST) // [r"invalid conversion from 'void*' to 'char*'"] |
| # |
| # void* a = NULL; |
| # char* b = a; |
| # |
| # #endif |
| # |
| # If we needed disable TEST_NEEDS_SEMICOLON, then change the define to: |
| # |
| # DISABLE_TEST_NEEDS_SEMICOLON |
| # TEST_NEEDS_CAST |
| # |
| # The lines above are parsed by a regexp so avoid getting creative with the |
| # formatting or ifdef logic; it will likely just not work. |
| # |
| # Implementation notes: |
| # The .nc files are actually processed by a python script which executes the |
| # compiler and generates a .cc file that is empty on success, or will have a |
| # series of #error lines on failure, and a set of trivially passing gunit |
| # TEST() functions on success. This allows us to fail at the compile step when |
| # something goes wrong, and know during the unittest run that the test was at |
| # least processed when things go right. |
| |
| import("//build/config/clang/clang.gni") |
| import("//build/toolchain/toolchain.gni") |
| import("//testing/test.gni") |
| |
| declare_args() { |
| # TODO(crbug.com/105388): make sure no-compile test is not flaky. |
| enable_nocompile_tests = |
| (is_linux || is_mac || is_ios) && is_clang && host_cpu == target_cpu |
| } |
| |
| if (enable_nocompile_tests) { |
| import("//build/config/c++/c++.gni") |
| import("//build/config/sysroot.gni") |
| template("nocompile_test") { |
| nocompile_target = target_name + "_run_nocompile" |
| |
| action_foreach(nocompile_target) { |
| testonly = true |
| script = "//tools/nocompile_driver.py" |
| sources = invoker.sources |
| deps = invoker.deps |
| if (defined(invoker.public_deps)) { |
| public_deps = invoker.public_deps |
| } |
| |
| result_path = "$target_gen_dir/{{source_name_part}}_nc.cc" |
| depfile = "${result_path}.d" |
| outputs = [ result_path ] |
| args = [ |
| rebase_path("$clang_base_path/bin/clang++", root_build_dir), |
| "4", # number of compilers to invoke in parallel. |
| "{{source}}", |
| rebase_path(result_path, root_build_dir), |
| "--", |
| "-nostdinc++", |
| "-isystem" + rebase_path("$libcxx_prefix/include", root_build_dir), |
| "-isystem" + rebase_path("$libcxxabi_prefix/include", root_build_dir), |
| "-std=c++14", |
| "-Wall", |
| "-Werror", |
| "-Wfatal-errors", |
| "-Wthread-safety", |
| "-I" + rebase_path("//", root_build_dir), |
| "-I" + rebase_path(root_gen_dir, root_build_dir), |
| |
| # TODO(https://crbug.com/989932): Track build/config/compiler/BUILD.gn |
| "-Wno-implicit-int-float-conversion", |
| ] |
| if (sysroot != "") { |
| args += [ |
| "--sysroot", |
| rebase_path(sysroot, root_build_dir), |
| ] |
| } |
| } |
| |
| test(target_name) { |
| deps = invoker.deps + [ ":$nocompile_target" ] |
| sources = get_target_outputs(":$nocompile_target") |
| } |
| } |
| } |