package domain

import "testing"


func TestQuota(t *testing.T) {
	quota := FileSizeQuota { 1000, 0 }

	if !quota.Allows(1000) {
		t.Errorf("It should allow filling completely")
	}
	if quota.Allows(1001) {
		t.Errorf("It should not allow filling completely")
	}
}

func TestQuotaManipulation(t *testing.T) {
	quota := FileSizeQuota { 1000, 0 }

	if quota.Add(500) != nil {
		t.Errorf("It should allow adding")
	}

	if quota.CurrentUsage != 500 {
		t.Errorf("It should add the usage correctly")
	}

	if quota.Add(500) != nil {
		t.Errorf("It should allow adding up to the limit")
	}

	if quota.Add(1) != ErrExceedQuota {
		t.Errorf("It should not allow adding beyond limit")
	}

	if quota.CurrentUsage != 1000 {
		t.Errorf("It should not overtaxed after failure to add")
	}

	if quota.Remove(1001) != ErrQuotaInvalid {
		t.Errorf("It should not allow reducing further than 0")
	}

	if quota.CurrentUsage != 1000 {
		t.Errorf("It should not overtaxed after failure to remove")
	}

	if quota.Remove(1000) != nil {
		t.Errorf("It should allow reducing to 0")
	}

	if quota.CurrentUsage != 0 {
		t.Errorf("It should reduce accurately")
	}
}