Move test tasks to test.rake to fix dependencies

The test task depends upon clearing MRuby's test task but we can't do
that until after MRuby's Rakefile loads.

Moving the test tasks to a separate file we import allows us to clear
MRuby's test actions at the proper time.

Author: drbrain

Rakefile

@@ -24,10 +24,14 @@ end
 task :mruby => mruby_root
 
 mruby_rakefile = "#{mruby_root}/Rakefile"
-file mruby_rakefile => mruby_root
 
+file   mruby_rakefile => mruby_root
 import mruby_rakefile
 
+test_rakefile = "tasks/test.rake"
+file   test_rakefile => mruby_rakefile
+import test_rakefile
+
 task :app_version do
   load "mrbgem.rake"
 
@@ -47,49 +51,6 @@ task :compile => [:all] do
   end
 end
 
-namespace :test do
-  desc "run mruby & unit tests"
-  # only build mtest for host
-  task :mtest => :compile do
-    # in order to get mruby/test/t/synatx.rb __FILE__ to pass,
-    # we need to make sure the tests are built relative from mruby_root
-    cd mruby_root do
-      MRuby.each_target do |target|
-        # only run unit tests here
-        target.enable_bintest = false
-        run_test if target.test_enabled?
-      end
-    end
-  end
-
-  def clean_env(envs)
-    old_env = {}
-    envs.each do |key|
-      old_env[key] = ENV[key]
-      ENV[key] = nil
-    end
-    yield
-    envs.each do |key|
-      ENV[key] = old_env[key]
-    end
-  end
-
-  desc "run integration tests"
-  task :bintest => :compile do
-    cd mruby_root do
-      MRuby.each_target do |target|
-        clean_env(%w(MRUBY_ROOT MRUBY_CONFIG)) do
-          run_bintest if target.bintest_enabled?
-        end
-      end
-    end
-  end
-end
-
-desc "run all tests"
-Rake::Task['test'].clear
-task :test => ['test:bintest', 'test:mtest']
-
 desc "cleanup"
 task :clean do
   sh "rake deep_clean"

tasks/test.rake

@@ -0,0 +1,45 @@
+# Remove default test task actions from MRuby's Rakefile
+Rake::Task['test'].clear
+
+namespace :test do
+  desc "run mruby & unit tests"
+  # only build mtest for host
+  task :mtest => :compile do
+    # in order to get mruby/test/t/synatx.rb __FILE__ to pass,
+    # we need to make sure the tests are built relative from MRUBY_ROOT
+    cd MRUBY_ROOT do
+      MRuby.each_target do |target|
+        # only run unit tests here
+        target.enable_bintest = false
+        run_test if target.test_enabled?
+      end
+    end
+  end
+
+  def clean_env(envs)
+    old_env = {}
+    envs.each do |key|
+      old_env[key] = ENV[key]
+      ENV[key] = nil
+    end
+    yield
+    envs.each do |key|
+      ENV[key] = old_env[key]
+    end
+  end
+
+  desc "run integration tests"
+  task :bintest => :compile do
+    cd MRUBY_ROOT do
+      MRuby.each_target do |target|
+        clean_env(%w(MRUBY_ROOT MRUBY_CONFIG)) do
+          run_bintest if target.bintest_enabled?
+        end
+      end
+    end
+  end
+end
+
+desc "run all tests"
+task :test => ['test:bintest', 'test:mtest']
+