1 files changed, 113 insertions, 0 deletions
diff --git a/java/system_modules_test.go b/java/system_modules_test.go
new file mode 100644
index 000000000..7b5a3867e
--- /dev/null
+++ b/java/system_modules_test.go
@@ -0,0 +1,113 @@
+// Copyright 2021 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 java
+
+import (
+	"testing"
+
+	"android/soong/android"
+)
+
+func getModuleHeaderJarsAsRelativeToTopPaths(result *android.TestResult, moduleNames ...string) []string {
+	paths := []string{}
+	for _, moduleName := range moduleNames {
+		module := result.Module(moduleName, "android_common")
+		info := result.ModuleProvider(module, JavaInfoProvider).(JavaInfo)
+		paths = append(paths, info.HeaderJars.RelativeToTop().Strings()...)
+	}
+	return paths
+}
+
+var addSourceSystemModules = android.FixtureAddTextFile("source/Android.bp", `
+		java_system_modules {
+			name: "system-modules",
+			libs: ["system-module1", "system-module2"],
+		}
+		java_library {
+			name: "system-module1",
+			srcs: ["a.java"],
+			sdk_version: "none",
+			system_modules: "none",
+		}
+		java_library {
+			name: "system-module2",
+			srcs: ["b.java"],
+			sdk_version: "none",
+			system_modules: "none",
+		}
+`)
+
+func TestJavaSystemModules(t *testing.T) {
+	result := android.GroupFixturePreparers(prepareForJavaTest, addSourceSystemModules).RunTest(t)
+
+	// check the existence of the source module
+	sourceSystemModules := result.ModuleForTests("system-modules", "android_common")
+	sourceInputs := sourceSystemModules.Rule("jarsTosystemModules").Inputs
+
+	// The expected paths are the header jars from the source input modules.
+	expectedSourcePaths := getModuleHeaderJarsAsRelativeToTopPaths(result, "system-module1", "system-module2")
+	android.AssertArrayString(t, "source system modules inputs", expectedSourcePaths, sourceInputs.RelativeToTop().Strings())
+}
+
+var addPrebuiltSystemModules = android.FixtureAddTextFile("prebuilts/Android.bp", `
+		java_system_modules_import {
+			name: "system-modules",
+			libs: ["system-module1", "system-module2"],
+		}
+		java_import {
+			name: "system-module1",
+			jars: ["a.jar"],
+		}
+		java_import {
+			name: "system-module2",
+			jars: ["b.jar"],
+		}
+`)
+
+func TestJavaSystemModulesImport(t *testing.T) {
+	result := android.GroupFixturePreparers(prepareForJavaTest, addPrebuiltSystemModules).RunTest(t)
+
+	// check the existence of the renamed prebuilt module
+	prebuiltSystemModules := result.ModuleForTests("system-modules", "android_common")
+	prebuiltInputs := prebuiltSystemModules.Rule("jarsTosystemModules").Inputs
+
+	// The expected paths are the header jars from the renamed prebuilt input modules.
+	expectedPrebuiltPaths := getModuleHeaderJarsAsRelativeToTopPaths(result, "system-module1", "system-module2")
+	android.AssertArrayString(t, "renamed prebuilt system modules inputs", expectedPrebuiltPaths, prebuiltInputs.RelativeToTop().Strings())
+}
+
+func TestJavaSystemModulesMixSourceAndPrebuilt(t *testing.T) {
+	result := android.GroupFixturePreparers(
+		prepareForJavaTest,
+		addSourceSystemModules,
+		addPrebuiltSystemModules,
+	).RunTest(t)
+
+	// check the existence of the source module
+	sourceSystemModules := result.ModuleForTests("system-modules", "android_common")
+	sourceInputs := sourceSystemModules.Rule("jarsTosystemModules").Inputs
+
+	// The expected paths are the header jars from the source input modules.
+	expectedSourcePaths := getModuleHeaderJarsAsRelativeToTopPaths(result, "system-module1", "system-module2")
+	android.AssertArrayString(t, "source system modules inputs", expectedSourcePaths, sourceInputs.RelativeToTop().Strings())
+
+	// check the existence of the renamed prebuilt module
+	prebuiltSystemModules := result.ModuleForTests("prebuilt_system-modules", "android_common")
+	prebuiltInputs := prebuiltSystemModules.Rule("jarsTosystemModules").Inputs
+
+	// The expected paths are the header jars from the renamed prebuilt input modules.
+	expectedPrebuiltPaths := getModuleHeaderJarsAsRelativeToTopPaths(result, "prebuilt_system-module1", "prebuilt_system-module2")
+	android.AssertArrayString(t, "prebuilt system modules inputs", expectedPrebuiltPaths, prebuiltInputs.RelativeToTop().Strings())
+}