Move TestEnforceRRO test cases into test function

The test cases will need to reference buildDir, which is not
yet set at global variable initialization time.

Bug: 123510624
Test: TestEnforceRRO
Change-Id: I0dda0184dfab496c820e11ed76b7594a60d5d587

java/app_test.go

@@ -106,13 +106,14 @@ func TestApp(t *testing.T) {
 	}
 }
 
-var testEnforceRROTests = []struct {
+func TestEnforceRRO(t *testing.T) {
+	testCases := []struct {
 		name                       string
 		enforceRROTargets          []string
 		enforceRROExcludedOverlays []string
 		overlayFiles               map[string][]string
 		rroDirs                    map[string][]string
-}{
+	}{
 		{
 			name:                       "no RRO",
 			enforceRROTargets:          nil,
@@ -165,9 +166,8 @@ var testEnforceRROTests = []struct {
 				"bar": []string{"device/vendor/blah/overlay/bar/res"},
 			},
 		},
-}
+	}
 
-func TestEnforceRRO(t *testing.T) {
 	resourceOverlays := []string{
 		"device/vendor/blah/overlay",
 		"device/vendor/blah/overlay2",
@@ -196,7 +196,7 @@ func TestEnforceRRO(t *testing.T) {
 			}
 		`
 
-	for _, testCase := range testEnforceRROTests {
+	for _, testCase := range testCases {
 		t.Run(testCase.name, func(t *testing.T) {
 			config := testConfig(nil)
 			config.TestProductVariables.ResourceOverlays = resourceOverlays