Add python_test_host module.

bug: 31676493
Test: created py_test modules in real folder. and ran 'mma'.
Change-Id: I22aa2fad74b11e4a31ea7a4c4a4f0ea64cd3fc94
diff --git a/python/test.go b/python/test.go
new file mode 100644
index 0000000..8318438
--- /dev/null
+++ b/python/test.go
@@ -0,0 +1,54 @@
+// Copyright 2017 Google Inc. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package python
+
+import (
+	"android/soong/android"
+	"path/filepath"
+
+	"github.com/google/blueprint"
+)
+
+// This file contains the module types for building Python test.
+
+func init() {
+	android.RegisterModuleType("python_test_host", PythonTestHostFactory)
+}
+
+type PythonTestHost struct {
+	pythonBinaryBase
+}
+
+var _ PythonSubModule = (*PythonTestHost)(nil)
+
+type pythonTestHostDecorator struct {
+	pythonDecorator
+}
+
+func (p *pythonTestHostDecorator) install(ctx android.ModuleContext, file android.Path) {
+	p.pythonDecorator.baseInstaller.dir = filepath.Join("nativetest", ctx.ModuleName())
+	p.pythonDecorator.baseInstaller.install(ctx, file)
+}
+
+func PythonTestHostFactory() (blueprint.Module, []interface{}) {
+	decorator := &pythonTestHostDecorator{
+		pythonDecorator: pythonDecorator{baseInstaller: NewPythonInstaller("nativetest")}}
+
+	module := &PythonBinaryHost{}
+	module.pythonBaseModule.installer = decorator
+
+	return InitPythonBaseModule(&module.pythonBinaryBase.pythonBaseModule,
+		&module.pythonBinaryBase, android.HostSupportedNoCross, &module.binaryProperties)
+}