Delay test code build until `rake test`

With this change, the test code will not be built unless `rake test` is
run, so there will be almost no side effects even if `enable_test` is
always set (but, gems specified by `add_test_dependency` are included
in `libmruby.a`).

Also added are `test: build` task, which only builds the test code
(including the main code), and `test: run` task, which only runs tests
independent of build. Therefore, the idiom for building in parallel and
not running tests in parallel is `rake -m test:build && rake test:run`.

1 files changed, 64 insertions, 0 deletions

diff --git a/tasks/test.rake b/tasks/test.rake
new file mode 100644
index 000000000..80f7670af
--- /dev/null
+++ b/tasks/test.rake
@@ -0,0 +1,64 @@
+desc "build and run all mruby tests"
+task :test => "test:build" do
+  Rake::Task["test:run"].invoke
+end
+
+namespace :test do |test_ns|
+  desc "build and run library tests"
+  task :lib => "build:lib" do
+    test_ns["run:lib"].invoke
+  end
+
+  desc "build and run command binaries tests"
+  task :bin => :all do
+    test_ns["run:bin"].invoke
+  end
+
+  desc "build all mruby tests"
+  task :build => "build:lib"
+
+  namespace :build do
+    desc "build library tests"
+    task :lib
+  end
+
+  desc "run all mruby tests"
+  task :run
+
+  namespace :run do
+    desc "run library tests"
+    task :lib
+
+    desc "run command binaries tests"
+    task :bin
+  end
+end
+
+MRuby.each_target do |build|
+  if build.test_enabled?
+    t = task "test:build:lib:#{build.name}" => :all do
+      gem = build.gem(core: 'mruby-test')
+      gem.setup
+      gem.setup_compilers
+      Rake::Task[build.define_installer_if_needed("mrbtest")].invoke
+    end
+    task "test:build:lib" => t
+
+    t = task "test:run:lib:#{build.name}" do
+      build.run_test
+    end
+    task "test:run" => t
+    task "test:run:lib" => t
+  end
+  if build.bintest_enabled?
+    t = task "test:run:bin:#{build.name}" do
+      build.run_bintest
+    end
+    task "test:run" => t
+    task "test:run:bin" => t
+  end
+end
+
+task :clean do
+  rm_f "#{MRuby::Build.install_dir}/mrbtest"
+end