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package clock
import (
"context"
"errors"
"testing"
"time"
)
// Ensure that WithDeadline is cancelled when deadline exceeded.
func TestMock_WithDeadline(t *testing.T) {
m := NewMock()
ctx, _ := m.WithDeadline(context.Background(), m.Now().Add(time.Second))
m.Add(time.Second)
select {
case <-ctx.Done():
if !errors.Is(ctx.Err(), context.DeadlineExceeded) {
t.Error("invalid type of error returned when deadline exceeded")
}
default:
t.Error("context is not cancelled when deadline exceeded")
}
}
// Ensure that WithDeadline does nothing when the deadline is later than the current deadline.
func TestMock_WithDeadlineLaterThanCurrent(t *testing.T) {
m := NewMock()
ctx, _ := m.WithDeadline(context.Background(), m.Now().Add(time.Second))
ctx, _ = m.WithDeadline(ctx, m.Now().Add(10*time.Second))
m.Add(time.Second)
select {
case <-ctx.Done():
if !errors.Is(ctx.Err(), context.DeadlineExceeded) {
t.Error("invalid type of error returned when deadline exceeded")
}
default:
t.Error("context is not cancelled when deadline exceeded")
}
}
// Ensure that WithDeadline cancel closes Done channel with context.Canceled error.
func TestMock_WithDeadlineCancel(t *testing.T) {
m := NewMock()
ctx, cancel := m.WithDeadline(context.Background(), m.Now().Add(time.Second))
cancel()
select {
case <-ctx.Done():
if !errors.Is(ctx.Err(), context.Canceled) {
t.Error("invalid type of error returned after cancellation")
}
case <-time.After(time.Second):
t.Error("context is not cancelled after cancel was called")
}
}
// Ensure that WithDeadline closes child contexts after it was closed.
func TestMock_WithDeadlineCancelledWithParent(t *testing.T) {
m := NewMock()
parent, cancel := context.WithCancel(context.Background())
ctx, _ := m.WithDeadline(parent, m.Now().Add(time.Second))
cancel()
select {
case <-ctx.Done():
if !errors.Is(ctx.Err(), context.Canceled) {
t.Error("invalid type of error returned after cancellation")
}
case <-time.After(time.Second):
t.Error("context is not cancelled when parent context is cancelled")
}
}
// Ensure that WithDeadline cancelled immediately when deadline has already passed.
func TestMock_WithDeadlineImmediate(t *testing.T) {
m := NewMock()
ctx, _ := m.WithDeadline(context.Background(), m.Now().Add(-time.Second))
select {
case <-ctx.Done():
if !errors.Is(ctx.Err(), context.DeadlineExceeded) {
t.Error("invalid type of error returned when deadline has already passed")
}
default:
t.Error("context is not cancelled when deadline has already passed")
}
}
// Ensure that WithTimeout is cancelled when deadline exceeded.
func TestMock_WithTimeout(t *testing.T) {
m := NewMock()
ctx, _ := m.WithTimeout(context.Background(), time.Second)
m.Add(time.Second)
select {
case <-ctx.Done():
if !errors.Is(ctx.Err(), context.DeadlineExceeded) {
t.Error("invalid type of error returned when time is over")
}
default:
t.Error("context is not cancelled when time is over")
}
}
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