if _, ok := args["groups"]; !ok {
		if len(groups) > 0 {
			args["groups"] = groups
		}
	}

	return args
}

// PolicyToBucketAccessPolicy converts a MinIO policy into a minio-go policy data structure.
func PolicyToBucketAccessPolicy(bucketPolicy *policy.BucketPolicy) (*miniogopolicy.BucketAccessPolicy, error) {
	// Return empty BucketAccessPolicy for empty bucket policy.
	if bucketPolicy == nil {

		expectErr      bool
	}{
		{case1Policy, case1Result, false},
		{case2Policy, case2Result, false},
		{case3Policy, nil, true},
	}

	for i, testCase := range testCases {
		result, err := PolicyToBucketAccessPolicy(testCase.bucketPolicy)
		expectErr := (err != nil)

		if expectErr != testCase.expectErr {
			t.Fatalf("case %v: error: expected: %v, got: %v\n", i+1, testCase.expectErr, expectErr)
		}