Add allowed-deps tests

These tests capture
- track updatable apexes
- do not track apex-only modules
- track transitive deps
- track external deps (with mark)

Bug: 274041915
Test: m nothing
Change-Id: I629015f5aa4a1a7627d0ba6d92fd42bb99c96287

apex/apex_singleton.go

@@ -23,7 +23,11 @@ import (
 )
 
 func init() {
-	android.RegisterSingletonType("apex_depsinfo_singleton", apexDepsInfoSingletonFactory)
+	registerApexDepsInfoComponents(android.InitRegistrationContext)
+}
+
+func registerApexDepsInfoComponents(ctx android.RegistrationContext) {
+	ctx.RegisterSingletonType("apex_depsinfo_singleton", apexDepsInfoSingletonFactory)
 }
 
 type apexDepsInfoSingleton struct {

apex/apex_test.go

@@ -1980,6 +1980,93 @@ func TestApexMinSdkVersion_InVendorApex(t *testing.T) {
 	android.AssertStringDoesContain(t, "cflags", cflags, "-target aarch64-linux-android29")
 }
 
+func TestTrackAllowedDeps(t *testing.T) {
+	ctx := testApex(t, `
+		apex {
+			name: "myapex",
+			key: "myapex.key",
+			updatable: true,
+			native_shared_libs: [
+				"mylib",
+				"yourlib",
+			],
+			min_sdk_version: "29",
+		}
+
+		apex {
+			name: "myapex2",
+			key: "myapex.key",
+			updatable: false,
+			native_shared_libs: ["yourlib"],
+		}
+
+		apex_key {
+			name: "myapex.key",
+			public_key: "testkey.avbpubkey",
+			private_key: "testkey.pem",
+		}
+
+		cc_library {
+			name: "mylib",
+			srcs: ["mylib.cpp"],
+			shared_libs: ["libbar"],
+			min_sdk_version: "29",
+			apex_available: ["myapex"],
+		}
+
+		cc_library {
+			name: "libbar",
+			stubs: { versions: ["29", "30"] },
+		}
+
+		cc_library {
+			name: "yourlib",
+			srcs: ["mylib.cpp"],
+			min_sdk_version: "29",
+			apex_available: ["myapex", "myapex2", "//apex_available:platform"],
+		}
+	`, withFiles(android.MockFS{
+		"packages/modules/common/build/allowed_deps.txt": nil,
+	}))
+
+	depsinfo := ctx.SingletonForTests("apex_depsinfo_singleton")
+	inputs := depsinfo.Rule("generateApexDepsInfoFilesRule").BuildParams.Inputs.Strings()
+	android.AssertStringListContains(t, "updatable myapex should generate depsinfo file", inputs,
+		"out/soong/.intermediates/myapex/android_common_myapex_image/depsinfo/flatlist.txt")
+	android.AssertStringListDoesNotContain(t, "non-updatable myapex2 should not generate depsinfo file", inputs,
+		"out/soong/.intermediates/myapex2/android_common_myapex2_image/depsinfo/flatlist.txt")
+
+	myapex := ctx.ModuleForTests("myapex", "android_common_myapex_image")
+	flatlist := strings.Split(myapex.Output("depsinfo/flatlist.txt").BuildParams.Args["content"], "\\n")
+	android.AssertStringListContains(t, "deps with stubs should be tracked in depsinfo as external dep",
+		flatlist, "libbar(minSdkVersion:(no version)) (external)")
+	android.AssertStringListDoesNotContain(t, "do not track if not available for platform",
+		flatlist, "mylib:(minSdkVersion:29)")
+	android.AssertStringListContains(t, "track platform-available lib",
+		flatlist, "yourlib(minSdkVersion:29)")
+}
+
+func TestTrackAllowedDeps_SkipWithoutAllowedDepsTxt(t *testing.T) {
+	ctx := testApex(t, `
+		apex {
+			name: "myapex",
+			key: "myapex.key",
+			updatable: true,
+			min_sdk_version: "29",
+		}
+
+		apex_key {
+			name: "myapex.key",
+			public_key: "testkey.avbpubkey",
+			private_key: "testkey.pem",
+		}
+	`)
+	depsinfo := ctx.SingletonForTests("apex_depsinfo_singleton")
+	if nil != depsinfo.MaybeRule("generateApexDepsInfoFilesRule").Output {
+		t.Error("apex_depsinfo_singleton shouldn't run when allowed_deps.txt doesn't exist")
+	}
+}
+
 func TestPlatformUsesLatestStubsFromApexes(t *testing.T) {
 	ctx := testApex(t, `
 		apex {

apex/testing.go

@@ -19,6 +19,7 @@ import "android/soong/android"
 var PrepareForTestWithApexBuildComponents = android.GroupFixturePreparers(
 	android.FixtureRegisterWithContext(registerApexBuildComponents),
 	android.FixtureRegisterWithContext(registerApexKeyBuildComponents),
+	android.FixtureRegisterWithContext(registerApexDepsInfoComponents),
 	// Additional files needed in tests that disallow non-existent source files.
 	// This includes files that are needed by all, or at least most, instances of an apex module type.
 	android.MockFS{