Add test for manifest merger

Add a test for the manifest merger command line that would have prevented
b/291252863.

Bug: 291252863
Test: TestManifestMerger
Change-Id: I8c025efe7ccb06ad97b405e2927a4df07f9d3f27

java/Android.bp

@@ -80,6 +80,7 @@ bootstrap_go_package {
     ],
     testSrcs: [
         "aar_test.go",
+        "android_manifest_test.go",
         "androidmk_test.go",
         "app_import_test.go",
         "app_set_test.go",

java/android_manifest_test.go

@@ -0,0 +1,103 @@
+// Copyright 2023 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 (
+	"android/soong/android"
+	"testing"
+)
+
+func TestManifestMerger(t *testing.T) {
+	bp := `
+		android_app {
+			name: "app",
+			sdk_version: "current",
+			srcs: ["app/app.java"],
+			resource_dirs: ["app/res"],
+			manifest: "app/AndroidManifest.xml",
+			additional_manifests: ["app/AndroidManifest2.xml"],
+			static_libs: ["direct", "direct_import"],
+		}
+
+		android_library {
+			name: "direct",
+			sdk_version: "current",
+			srcs: ["direct/direct.java"],
+			resource_dirs: ["direct/res"],
+			manifest: "direct/AndroidManifest.xml",
+			additional_manifests: ["direct/AndroidManifest2.xml"],
+			static_libs: ["transitive", "transitive_import"],
+		}
+
+		android_library {
+			name: "transitive",
+			sdk_version: "current",
+			srcs: ["transitive/transitive.java"],
+			resource_dirs: ["transitive/res"],
+			manifest: "transitive/AndroidManifest.xml",
+			additional_manifests: ["transitive/AndroidManifest2.xml"],
+		}
+
+		android_library_import {
+			name: "direct_import",
+			sdk_version: "current",
+			aars: ["direct_import.aar"],
+			static_libs: ["direct_import_dep"],
+		}
+
+		android_library_import {
+			name: "direct_import_dep",
+			sdk_version: "current",
+			aars: ["direct_import_dep.aar"],
+		}
+
+		android_library_import {
+			name: "transitive_import",
+			sdk_version: "current",
+			aars: ["transitive_import.aar"],
+			static_libs: ["transitive_import_dep"],
+		}
+
+		android_library_import {
+			name: "transitive_import_dep",
+			sdk_version: "current",
+			aars: ["transitive_import_dep.aar"],
+		}
+	`
+
+	result := android.GroupFixturePreparers(
+		PrepareForTestWithJavaDefaultModules,
+		PrepareForTestWithOverlayBuildComponents,
+	).RunTestWithBp(t, bp)
+
+	manifestMergerRule := result.ModuleForTests("app", "android_common").Rule("manifestMerger")
+	android.AssertPathRelativeToTopEquals(t, "main manifest",
+		"out/soong/.intermediates/app/android_common/manifest_fixer/AndroidManifest.xml",
+		manifestMergerRule.Input)
+	android.AssertPathsRelativeToTopEquals(t, "lib manifests",
+		[]string{
+			"app/AndroidManifest2.xml",
+			"out/soong/.intermediates/direct/android_common/manifest_fixer/AndroidManifest.xml",
+			"direct/AndroidManifest2.xml",
+			"out/soong/.intermediates/transitive/android_common/manifest_fixer/AndroidManifest.xml",
+			"transitive/AndroidManifest2.xml",
+			"out/soong/.intermediates/transitive_import/android_common/aar/AndroidManifest.xml",
+			"out/soong/.intermediates/direct_import/android_common/aar/AndroidManifest.xml",
+			// TODO(b/288358614): Soong has historically not merged manifests from dependencies of
+			// android_library_import modules.
+
+		},
+		manifestMergerRule.Implicits)
+}