diff --git a/testing/test_spec.go b/testing/test_spec.go
new file mode 100644
index 0000000..1ad2768
--- /dev/null
+++ b/testing/test_spec.go
@@ -0,0 +1,127 @@
+// Copyright 2020 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 testing
+
+import (
+	"path/filepath"
+	"strconv"
+
+	"android/soong/android"
+	"android/soong/testing/test_spec_proto"
+	"github.com/google/blueprint"
+	"google.golang.org/protobuf/proto"
+)
+
+// ErrTestModuleDataNotFound is the error message for missing test module provider data.
+const ErrTestModuleDataNotFound = "The module '%s' does not provide test specification data. Hint: This issue could arise if either the module is not a valid testing module or if it lacks the required 'TestModuleProviderKey' provider.\n"
+
+func TestSpecFactory() android.Module {
+	module := &TestSpecModule{}
+
+	android.InitAndroidModule(module)
+	android.InitDefaultableModule(module)
+	module.AddProperties(&module.properties)
+
+	return module
+}
+
+type TestSpecModule struct {
+	android.ModuleBase
+	android.DefaultableModuleBase
+	android.BazelModuleBase
+
+	// Properties for "test_spec"
+	properties struct {
+		// Specifies the name of the test config.
+		Name string
+		// Specifies the team ID.
+		TeamId string
+		// Specifies the list of tests covered under this module.
+		Tests []string
+	}
+}
+
+type testsDepTagType struct {
+	blueprint.BaseDependencyTag
+}
+
+var testsDepTag = testsDepTagType{}
+
+func (module *TestSpecModule) DepsMutator(ctx android.BottomUpMutatorContext) {
+	// Validate Properties
+	if len(module.properties.TeamId) == 0 {
+		ctx.PropertyErrorf("TeamId", "Team Id not found in the test_spec module. Hint: Maybe the TeamId property hasn't been properly specified.")
+	}
+	if !isInt(module.properties.TeamId) {
+		ctx.PropertyErrorf("TeamId", "Invalid value for Team ID. The Team ID must be an integer.")
+	}
+	if len(module.properties.Tests) == 0 {
+		ctx.PropertyErrorf("Tests", "Expected to attribute some test but none found. Hint: Maybe the test property hasn't been properly specified.")
+	}
+	ctx.AddDependency(ctx.Module(), testsDepTag, module.properties.Tests...)
+}
+func isInt(s string) bool {
+	_, err := strconv.Atoi(s)
+	return err == nil
+}
+
+// Provider published by TestSpec
+type testSpecProviderData struct {
+	IntermediatePath android.WritablePath
+}
+
+var testSpecProviderKey = blueprint.NewProvider(testSpecProviderData{})
+
+type TestModuleProviderData struct {
+}
+
+var TestModuleProviderKey = blueprint.NewProvider(TestModuleProviderData{})
+
+func (module *TestSpecModule) GenerateAndroidBuildActions(ctx android.ModuleContext) {
+	for _, m := range ctx.GetDirectDepsWithTag(testsDepTag) {
+		if !ctx.OtherModuleHasProvider(m, TestModuleProviderKey) {
+			ctx.ModuleErrorf(ErrTestModuleDataNotFound, m.Name())
+		}
+	}
+	bpFilePath := filepath.Join(ctx.ModuleDir(), ctx.BlueprintsFile())
+	metadataList := make(
+		[]*test_spec_proto.TestSpec_OwnershipMetadata, 0,
+		len(module.properties.Tests),
+	)
+	for _, test := range module.properties.Tests {
+		targetName := test
+		metadata := test_spec_proto.TestSpec_OwnershipMetadata{
+			TrendyTeamId: &module.properties.TeamId,
+			TargetName:   &targetName,
+			Path:         &bpFilePath,
+		}
+		metadataList = append(metadataList, &metadata)
+	}
+	intermediatePath := android.PathForModuleOut(
+		ctx, "intermediateTestSpecMetadata.pb",
+	)
+	testSpecMetadata := test_spec_proto.TestSpec{OwnershipMetadataList: metadataList}
+	protoData, err := proto.Marshal(&testSpecMetadata)
+	if err != nil {
+		ctx.ModuleErrorf("Error: %s", err.Error())
+	}
+	android.WriteFileRule(ctx, intermediatePath, string(protoData))
+
+	ctx.SetProvider(
+		testSpecProviderKey, testSpecProviderData{
+			IntermediatePath: intermediatePath,
+		},
+	)
+}