public void FirstLoad_CallsLoadEventsInOrder()
{
var lazy = new LazyGetSetTester <object>(null, null).LazyGetSet;
int eventsCalledCount = 0,
valueCachedCallOrder = 0,
valueGetCallOrder = 0,
valueSetCallOrder = 0;
lazy.ValueCached += (sender, value) => valueCachedCallOrder = ++eventsCalledCount;
lazy.ValueGet += (sender, value) => valueGetCallOrder = ++eventsCalledCount;
lazy.ValueSet += (sender, value) => valueSetCallOrder = ++eventsCalledCount;
var val = lazy.Value;
Assert.AreEqual(1, valueCachedCallOrder);
Assert.AreEqual(2, valueGetCallOrder);
Assert.AreEqual(0, valueSetCallOrder);
lazy.Value = val;
Assert.AreEqual(2, valueGetCallOrder);
Assert.AreEqual(3, valueSetCallOrder);
Assert.AreEqual(4, valueCachedCallOrder);
}
public void SetLazyValue_WithNull_SetsCachedValue()
{
var lazy = new LazyGetSetTester <object>(null, o => { });
lazy.LazyGetSet.Value = null;
Assert.AreEqual(null, lazy.LazyGetSet.Value);
}
public void GetLazyValue_WithNull_LoadsValue()
{
var lazy = new LazyGetSetTester <object>(() => null);
var val = lazy.LazyGetSet.Value;
Assert.AreEqual(null, val);
}
public void GetLazyValue_WithGetFunc_CallsGetFunc()
{
var lazy = new LazyGetSetTester <object>();
_ = lazy.LazyGetSet.Value;
Assert.GreaterOrEqual(1, lazy.GetCount);
}
public void SetLazyValue_WithSetAction_CallsSetAction()
{
var lazy = new LazyGetSetTester <object>(null, null);
lazy.LazyGetSet.Value = null;
Assert.GreaterOrEqual(1, lazy.SetCount);
}
public void GetSetLazy_WithDifferentValues_UpdatesAndUsesCache()
{
var firstVal = 167;
var secondVal = "asdf";
var lazy = new LazyGetSetTester <object>(() => firstVal, null);
Assert.AreEqual(firstVal, lazy.LazyGetSet.Value);
Assert.AreEqual(1, lazy.GetCount);
lazy.LazyGetSet.Value = secondVal;
Assert.AreEqual(1, lazy.GetCount);
Assert.AreEqual(secondVal, lazy.LazyGetSet.Value);
Assert.AreEqual(1, lazy.GetCount);
}
public void ClearCache_WhenItWasPreviouslyCached_SetsIsCachedToFalseAndReloadsOnNextRequest()
{
var lazy = new LazyGetSetTester <object>();
_ = lazy.LazyGetSet.Value;
Assert.IsTrue(lazy.LazyGetSet.IsCached);
Assert.AreEqual(1, lazy.GetCount);
lazy.LazyGetSet.ClearCache();
Assert.IsFalse(lazy.LazyGetSet.IsCached);
_ = lazy.LazyGetSet.Value;
Assert.IsTrue(lazy.LazyGetSet.IsCached);
Assert.AreEqual(2, lazy.GetCount);
}
public void SetLazyValue_WithoutSetAction_ThrowsInvalidOperation()
{
var lazy = new LazyGetSetTester <object>();
Assert.Throws <NotSupportedException>(() => lazy.LazyGetSet.Value = null);
}
