func Errorf(format string, a ...interface{}) error {
	e := fmt.Errorf(format, a...)
	ee := Error{}
	ee.msg = e.Error()
	ee.cause = errors.Unwrap(e)
	return ee
}

// Unwrap the internal error.
func (e Error) Unwrap() error { return e.cause }

// Error 'error' compatible method.
func (e Error) Error() string {
	if e.msg == "" {
		return "crypto: cause <nil>"
	}
	return e.msg
}

var (

	}
	for i, urs := range unparsableRangeSpecs {
		rs, err := parseRequestRangeSpec(urs)
		if err == nil {
			t.Errorf("Case %d: Did not get an expected error - got %v", i, rs)
		}
		if isErrInvalidRange(err) {
			t.Errorf("Case %d: Got invalid range error instead of a parse error", i)
		}
		if rs != nil {
			t.Errorf("Case %d: Got non-nil rs though err != nil: %v", i, rs)
		}
	}

	invalidRangeSpecs := []string{
		"bytes=5-3",

		return toAPIError(ctx, fmt.Errorf("error importing %s with: %w", fname, err))
	}
	return toAPIError(ctx, fmt.Errorf("error importing %s from %s with: %w", entity, fname, err))
}

// wraps import error for more context
func importErrorWithAPIErr(ctx context.Context, apiErr APIErrorCode, err error, fname, entity string) APIError {
	if entity == "" {
		return errorCodes.ToAPIErrWithErr(apiErr, fmt.Errorf("error importing %s with: %w", fname, err))

}

// Diff - returns error on first difference found in two configs.
func (s1 *ServerSystemConfig) Diff(s2 *ServerSystemConfig) error {
	ns1 := s1.NEndpoints
	ns2 := s2.NEndpoints
	if ns1 != ns2 {
		return fmt.Errorf("Expected number of endpoints %d, seen %d", ns1, ns2)
	}

	for i, cmdLine := range s1.CmdLines {
		if cmdLine != s2.CmdLines[i] {
			return fmt.Errorf("Expected command line argument %s, seen %s", cmdLine,

		if err != nil {
			t.Fatal(err)
		}

		err = checkPostPolicy(formValues, postPolicyForm)
		if err != nil && tt.expectedErr != nil && err.Error() != tt.expectedErr.Error() {
			t.Fatalf("Test %d:, Expected %s, got %s", i+1, tt.expectedErr.Error(), err.Error())
		}
	}

		if err != nil {
			return fmt.Errorf("xlMetaInlineData: %w", err)
		}
		if len(key) == 0 {
			return fmt.Errorf("xlMetaInlineData: key %d is length 0", i)
		}
		_, buf, err = msgp.ReadBytesZC(buf)
		if err != nil {
			return fmt.Errorf("xlMetaInlineData: %w", err)
		}
	}

	return nil
}

// repair will copy all seemingly valid data entries from a corrupted set.

			if testCase.err.Error() != err.Error() {
				t.Errorf("Test %d: %s: Expected to fail with error \"%s\", but instead failed with error \"%s\" instead", i+1, instanceType, testCase.err.Error(), err.Error())
			}
		}

		// Test passes as expected, but the output values are verified for correctness here.
		if err == nil && testCase.shouldPass {
			if testCase.result.Bucket != result.Bucket {

	result, err := setConfigKV(ctx, objectAPI, []byte(kv))
	if err != nil {
		internalLogIf(ctx, fmt.Errorf("error setting subnet license config: %w", err))
		return
	}

	if result.Dynamic {
		if err := applyDynamicConfigForSubSys(GlobalContext, objectAPI, result.Cfg, result.SubSys); err != nil {
			subnetLogIf(ctx, fmt.Errorf("error applying subnet dynamic config: %w", err))
			return
		}

		case "STANDARD", "REDUCED_REDUNDANCY":
		default:
			return fmt.Errorf("unknown storage class %s", dest.StorageClass)
		}
	}
	parsedDest.StorageClass = dest.StorageClass
	*d = parsedDest
	return nil
}

// Validate - validates Resource is for given bucket or not.
func (d Destination) Validate(bucketName string) error {
	if !d.IsValid() {
		return Errorf("invalid destination")
	}

			tmpfile, err := os.CreateTemp("", "testfile")
			if err != nil {
				t.Error(err)
			}
			tmpfile.WriteString(testCase.content)
			tmpfile.Sync()
			tmpfile.Close()

			value, err := readFromSecret(tmpfile.Name())
			if err != nil && !testCase.expectedErr {
				t.Error(err)
			}
			if err == nil && testCase.expectedErr {
				t.Error(errors.New("expected error, found success"))
			}
			if value != testCase.expectedValue {