Split up testJavaWithEnvFs

Instead of passing all the options to testJavaWithEnvFs, split it
up into testConfig, testContext, and run.  Tests that don't need
any special options can continue to use testJava, more complicated
tests can call the three functions manually.  This gives more
flexibility in complicated tests for the next patch.

Test: soong java tests
Change-Id: Ifd5dcb40cf08e4cbf69bf8e02c5698adbfbcdcb3
diff --git a/java/java_test.go b/java/java_test.go
index 5b36427..dbecc70 100644
--- a/java/java_test.go
+++ b/java/java_test.go
@@ -51,13 +51,14 @@
 
 	os.Exit(run())
 }
-func testJava(t *testing.T, bp string) *android.TestContext {
-	return testJavaWithEnvFs(t, bp, nil, nil)
+
+func testConfig(env map[string]string) android.Config {
+	return android.TestArchConfig(buildDir, env)
+
 }
 
-func testJavaWithEnvFs(t *testing.T, bp string,
-	env map[string]string, fs map[string][]byte) *android.TestContext {
-	config := android.TestArchConfig(buildDir, env)
+func testContext(config android.Config, bp string,
+	fs map[string][]byte) *android.TestContext {
 
 	ctx := android.NewTestArchContext()
 	ctx.RegisterModuleType("android_app", android.ModuleFactoryAdaptor(AndroidAppFactory))
@@ -104,21 +105,19 @@
 		}
 	`
 
-	if config.TargetOpenJDK9() {
-		systemModules := []string{
-			"core-system-modules",
-			"android_stubs_current_system_modules",
-			"android_system_stubs_current_system_modules",
-			"android_test_stubs_current_system_modules",
-		}
+	systemModules := []string{
+		"core-system-modules",
+		"android_stubs_current_system_modules",
+		"android_system_stubs_current_system_modules",
+		"android_test_stubs_current_system_modules",
+	}
 
-		for _, extra := range systemModules {
-			bp += fmt.Sprintf(`
+	for _, extra := range systemModules {
+		bp += fmt.Sprintf(`
 			java_system_modules {
 				name: "%s",
 			}
 		`, extra)
-		}
 	}
 
 	mockFS := map[string][]byte{
@@ -155,10 +154,20 @@
 
 	ctx.MockFileSystem(mockFS)
 
+	return ctx
+}
+
+func run(t *testing.T, ctx *android.TestContext, config android.Config) {
 	_, errs := ctx.ParseFileList(".", []string{"Android.bp"})
 	fail(t, errs)
 	_, errs = ctx.PrepareBuildActions(config)
 	fail(t, errs)
+}
+
+func testJava(t *testing.T, bp string) *android.TestContext {
+	config := testConfig(nil)
+	ctx := testContext(config, bp, nil)
+	run(t, ctx, config)
 
 	return ctx
 }
@@ -423,7 +432,9 @@
 
 			// Test again with javac 1.9
 			t.Run("1.9", func(t *testing.T) {
-				ctx := testJavaWithEnvFs(t, bp, map[string]string{"EXPERIMENTAL_USE_OPENJDK9": "true"}, nil)
+				config := testConfig(map[string]string{"EXPERIMENTAL_USE_OPENJDK9": "true"})
+				ctx := testContext(config, bp, nil)
+				run(t, ctx, config)
 
 				javac := ctx.ModuleForTests("foo", variant).Rule("javac")
 				got := javac.Args["bootClasspath"]