Export provenance metadata for prebuilt APKs and APEXes.

Bug: 217434690
Test: atest --host gen_provenance_metadata_test
Test: m provenance_metadata

Change-Id: I91c184b6e6fe5ccfc3fc65b55b09e7a3da9502a0
diff --git a/provenance/provenance_singleton_test.go b/provenance/provenance_singleton_test.go
new file mode 100644
index 0000000..0f1eae2
--- /dev/null
+++ b/provenance/provenance_singleton_test.go
@@ -0,0 +1,48 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * 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 provenance
+
+import (
+	"strings"
+	"testing"
+
+	"android/soong/android"
+)
+
+func TestProvenanceSingleton(t *testing.T) {
+	result := android.GroupFixturePreparers(
+		PrepareForTestWithProvenanceSingleton,
+		android.PrepareForTestWithAndroidMk).RunTestWithBp(t, "")
+
+	outputs := result.SingletonForTests("provenance_metadata_singleton").AllOutputs()
+	for _, output := range outputs {
+		testingBuildParam := result.SingletonForTests("provenance_metadata_singleton").Output(output)
+		switch {
+		case strings.Contains(output, "soong/provenance_metadata.textproto"):
+			android.AssertStringEquals(t, "Invalid build rule", "android/soong/provenance.mergeProvenanceMetaData", testingBuildParam.Rule.String())
+			android.AssertIntEquals(t, "Invalid input", len(testingBuildParam.Inputs), 0)
+			android.AssertStringDoesContain(t, "Invalid output path", output, "soong/provenance_metadata.textproto")
+			android.AssertIntEquals(t, "Invalid args", len(testingBuildParam.Args), 0)
+
+		case strings.HasSuffix(output, "provenance_metadata"):
+			android.AssertStringEquals(t, "Invalid build rule", "<builtin>:phony", testingBuildParam.Rule.String())
+			android.AssertStringEquals(t, "Invalid input", testingBuildParam.Inputs[0].String(), "out/soong/provenance_metadata.textproto")
+			android.AssertStringEquals(t, "Invalid output path", output, "provenance_metadata")
+			android.AssertIntEquals(t, "Invalid args", len(testingBuildParam.Args), 0)
+		}
+	}
+}