assertTrue(file.canWrite(), "Should be writable");

        // Test timestamps
        long createTime = file.createTime();
        long lastModified = file.lastModified();
        long lastAccess = file.lastAccess();

        assertTrue(createTime > 0, "Create time should be set");
        assertTrue(lastModified > 0, "Last modified time should be set");

type PolicyDoc struct {
	Version    int `json:",omitempty"`
	Policy     policy.Policy
	CreateDate time.Time
	UpdateDate time.Time
}

func newPolicyDoc(p policy.Policy) PolicyDoc {
	now := UTCNow().Round(time.Millisecond)
	return PolicyDoc{
		Version:    1,
		Policy:     p,
		CreateDate: now,
		UpdateDate: now,
	}
}

// defaultPolicyDoc - used to wrap a default policy as PolicyDoc.

		return nil, err
	}

	pdata, err := json.Marshal(d.Policy)
	if err != nil {
		return nil, err
	}

	return &madmin.PolicyInfo{
		PolicyName: policyName,
		Policy:     pdata,
		CreateDate: d.CreateDate,
		UpdateDate: d.UpdateDate,
	}, nil
}

// ListPolicies - lists all canned policies.
func (sys *IAMSys) ListPolicies(ctx context.Context, bucketName string) (map[string]policy.Policy, error) {