public void UsesCreatorAfterReset()
{
bool didCallRef = false;
var refLazy = new ResettableLazy <string>(() =>
{
if (didCallRef)
{
return("Second");
}
didCallRef = true;
return("First");
});
_ = refLazy.Value;
refLazy.Reset();
Assert.AreEqual("Second", refLazy.Value);
bool didCallVal = false;
var valLazy = new ResettableLazyValue <int>(() =>
{
if (didCallVal)
{
return(1337);
}
didCallVal = true;
return(42);
});
_ = valLazy.Value;
valLazy.Reset();
Assert.AreEqual(1337, valLazy.Value);
}
public void TakesValueFromCreator()
{
var refLazy = new ResettableLazy <string>(() => "Hello World");
Assert.AreEqual("Hello World", refLazy.Value);
var valLazy = new ResettableLazyValue <int>(() => 42);
Assert.AreEqual(42, valLazy.Value);
}
public void IsEmptyByDefault()
{
var refLazy = new ResettableLazy <string>(() => "");
Assert.IsFalse(refLazy.HasValue);
var valLazy = new ResettableLazyValue <int>(() => 0);
Assert.IsFalse(valLazy.HasValue);
}
public void CanBeInitialized()
{
var refLazy = new ResettableLazy <string>(() => "", "Hello World");
Assert.IsTrue(refLazy.HasValue);
Assert.AreEqual("Hello World", refLazy.Value);
var valLazy = new ResettableLazyValue <int>(() => 0, 42);
Assert.IsTrue(valLazy.HasValue);
Assert.AreEqual(valLazy.Value, 42);
}
public void IsNotEmptyAfterAccess()
{
var refLazy = new ResettableLazy <string>(() => "");
_ = refLazy.Value;
Assert.IsTrue(refLazy.HasValue);
var valLazy = new ResettableLazyValue <int>(() => 0);
_ = valLazy.Value;
Assert.IsTrue(valLazy.HasValue);
}
public void CanBeReset()
{
var refLazy = new ResettableLazy <string>(() => "");
_ = refLazy.Value;
refLazy.Reset();
Assert.IsFalse(refLazy.HasValue);
var valLazy = new ResettableLazyValue <int>(() => 0);
_ = valLazy.Value;
valLazy.Reset();
Assert.IsFalse(valLazy.HasValue);
}
public void DoesNotCallCreatorEarly()
{
bool didCallRef = false;
var refLazy = new ResettableLazy <string>(() => { didCallRef = true; return(""); });
Assert.IsFalse(didCallRef);
_ = refLazy.Value;
Assert.IsTrue(didCallRef);
bool didCallVal = false;
var valLazy = new ResettableLazyValue <int>(() => { didCallVal = true; return(0); });
Assert.IsFalse(didCallVal);
_ = valLazy.Value;
Assert.IsTrue(didCallVal);
}
public void CallsCreatorOnlyOnce()
{
int callCountRef = 0;
var refLazy = new ResettableLazy <string>(() => { callCountRef++; return(""); });
_ = refLazy.Value;
_ = refLazy.Value;
_ = refLazy.Value;
Assert.AreEqual(1, callCountRef);
int callCountVal = 0;
var valLazy = new ResettableLazyValue <int>(() => { callCountVal++; return(0); });
_ = valLazy.Value;
_ = valLazy.Value;
_ = valLazy.Value;
Assert.AreEqual(1, callCountVal);
}
