public void PropertyRecursion_callsOnMaxDepthReached()
{
var victim = new RecursionVictim();
var childTwo = new RecursionChildTwo();
var childThree = new RecursionChildThree
{
ChildTwo = childTwo
};
victim.PropChildTwo = childTwo;
victim.PropChildThree = childThree;
Traverser.TraverseInstance(victim, 1, listener);
A.CallTo(() => listener.OnMaxDepthReached(A <InstanceTraversalContext> ._)).MustHaveHappenedOnceExactly();
}
public void RecursionDoesNotCall_OnConstructor_forRecursedTypes()
{
var victim = new RecursionVictim();
var childTwo = new RecursionChildTwo();
var childThree = new RecursionChildThree
{
ChildTwo = childTwo
};
victim.PropChildTwo = childTwo;
victim.PropChildThree = childThree;
Traverser.TraverseInstance(victim, 5, listener);
var victimCtor = GetConstructor(typeof(RecursionVictim), new Type[0]);
A.CallTo(() => listener.OnConstructor(A <ConstructorInfo> .That.Matches(x => x != victimCtor), A <InstanceTraversalContext> ._)).MustNotHaveHappened();
}
public void FieldRecursion_stopsWhenOnFieldReturnsFalse()
{
var victim = new RecursionVictim();
var childTwo = new RecursionChildTwo();
var childThree = new RecursionChildThree
{
ChildTwo = childTwo
};
victim.FieldChildTwo = childTwo;
victim.FieldChildThree = childThree;
var type = victim.GetType();
var child2Type = typeof(RecursionChildTwo);
var child3Type = typeof(RecursionChildThree);
var callCounts = new Dictionary <string, int>
{
{ ".FieldChildTwo", 0 },
{ "FieldChildTwo.ChildTwoString", 0 },
{ ".FieldChildThree", 0 },
{ "FieldChildThree.ChildThreeString", 0 },
{ "FieldChildThree.ChildTwo", 0 },
{ "FieldChildThree.ChildTwo.ChildTwoString", 0 }
};
// first we get a call for the top level child two field
A.CallTo(() => listener.OnField(GetField(type, "FieldChildTwo"), A <Func <object> > ._, A <InstanceTraversalContext> ._))
.Invokes(x =>
{
var ctx = (InstanceTraversalContext)x.Arguments[2];
Assert.Equal(0, ctx.CurrentDepth);
callCounts[".FieldChildTwo"]++;
})
.Returns(new SimpleInstanceListenerOnFieldOrPropResult {
DoContinueRecursion = true
});
// we then dig into the top level child two field instance
// and this is also triggered for the FieldChildThree.ChildTwo instance
A.CallTo(() => listener.OnProperty(GetProp(child2Type, "ChildTwoString"), A <Func <object> > ._, A <InstanceTraversalContext> ._))
.Invokes(x =>
{
var ctx = (InstanceTraversalContext)x.Arguments[2];
if (ctx.CurrentDepth == 1)
{
Assert.Equal(1, ctx.CurrentDepth);
Assert.Equal("FieldChildTwo", ctx.BreadcrumbAsString);
callCounts["FieldChildTwo.ChildTwoString"]++;
}
else if (ctx.CurrentDepth == 2)
{
Assert.Equal(2, ctx.CurrentDepth);
Assert.Equal("FieldChildThree.ChildTwo", ctx.BreadcrumbAsString);
callCounts["FieldChildThree.ChildTwo.ChildTwoString"]++;
}
})
.Returns(new SimpleInstanceListenerOnFieldOrPropResult {
DoContinueRecursion = true
});
// then we visit the FieldChildThree top level field
A.CallTo(() => listener.OnField(GetField(type, "FieldChildThree"), A <Func <object> > ._, A <InstanceTraversalContext> ._))
.Invokes(x =>
{
var ctx = (InstanceTraversalContext)x.Arguments[2];
Assert.Equal(0, ctx.CurrentDepth);
callCounts[".FieldChildThree"]++;
})
.Returns(new SimpleInstanceListenerOnFieldOrPropResult {
DoContinueRecursion = false
}); // do not traverse further down this path
// if traversal continues although it should not, then FieldChildThree.ChildThreeString is next
A.CallTo(() => listener.OnProperty(GetProp(child3Type, "ChildThreeString"), A <Func <object> > ._, A <InstanceTraversalContext> ._))
.Invokes(x =>
{
var ctx = (InstanceTraversalContext)x.Arguments[2];
Assert.Equal(1, ctx.CurrentDepth);
Assert.Equal("FieldChildThree", ctx.BreadcrumbAsString);
callCounts["FieldChildThree.ChildThreeString"]++;
})
.Returns(new SimpleInstanceListenerOnFieldOrPropResult {
DoContinueRecursion = true
});
// if traversal continues although it should not, then FieldChildThree.ChildTwo is next
A.CallTo(() => listener.OnProperty(GetProp(child3Type, "ChildTwo"), A <Func <object> > ._, A <InstanceTraversalContext> ._))
.Invokes(x =>
{
var ctx = (InstanceTraversalContext)x.Arguments[2];
Assert.Equal(1, ctx.CurrentDepth);
Assert.Equal("FieldChildThree", ctx.BreadcrumbAsString);
callCounts["FieldChildThree.ChildTwo"]++;
})
.Returns(new SimpleInstanceListenerOnFieldOrPropResult {
DoContinueRecursion = true
});
Traverser.TraverseInstance(victim, 5, listener);
// these should have been called exactly once
Assert.Equal(1, callCounts[".FieldChildTwo"]);
Assert.Equal(1, callCounts["FieldChildTwo.ChildTwoString"]);
Assert.Equal(1, callCounts[".FieldChildThree"]);
// these should not have been called as traversal should stop at .FieldChildThree
Assert.Equal(0, callCounts["FieldChildThree.ChildThreeString"]);
Assert.Equal(0, callCounts["FieldChildThree.ChildTwo"]);
Assert.Equal(0, callCounts["FieldChildThree.ChildTwo.ChildTwoString"]);
}
public void PropertyRecursion_withinDepth_works()
{
var victim = new RecursionVictim();
var childTwo = new RecursionChildTwo();
var childThree = new RecursionChildThree
{
ChildTwo = childTwo
};
victim.PropChildTwo = childTwo;
victim.PropChildThree = childThree;
var type = victim.GetType();
var child2Type = typeof(RecursionChildTwo);
var child3Type = typeof(RecursionChildThree);
var callCounts = new Dictionary <string, int>
{
{ ".PropChildTwo", 0 },
{ "PropChildTwo.ChildTwoString", 0 },
{ ".PropChildThree", 0 },
{ "PropChildThree.ChildThreeString", 0 },
{ "PropChildThree.ChildTwo", 0 },
{ "PropChildThree.ChildTwo.ChildTwoString", 0 }
};
// first we get a call for the top level child two property
A.CallTo(() => listener.OnProperty(GetProp(type, "PropChildTwo"), A <Func <object> > ._, A <InstanceTraversalContext> ._))
.Invokes(x =>
{
var ctx = (InstanceTraversalContext)x.Arguments[2];
Assert.Equal(0, ctx.CurrentDepth);
callCounts[".PropChildTwo"]++;
})
.Returns(new SimpleInstanceListenerOnFieldOrPropResult {
DoContinueRecursion = true
});
// we then dig into the top level child two prop instance
// and this is also triggered for the PropChildThree.ChildTwo instance
A.CallTo(() => listener.OnProperty(GetProp(child2Type, "ChildTwoString"), A <Func <object> > ._, A <InstanceTraversalContext> ._))
.Invokes(x =>
{
var ctx = (InstanceTraversalContext)x.Arguments[2];
if (ctx.CurrentDepth == 1)
{
Assert.Equal(1, ctx.CurrentDepth);
Assert.Equal("PropChildTwo", ctx.BreadcrumbAsString);
callCounts["PropChildTwo.ChildTwoString"]++;
}
else if (ctx.CurrentDepth == 2)
{
Assert.Equal(2, ctx.CurrentDepth);
Assert.Equal("PropChildThree.ChildTwo", ctx.BreadcrumbAsString);
callCounts["PropChildThree.ChildTwo.ChildTwoString"]++;
}
})
.Returns(new SimpleInstanceListenerOnFieldOrPropResult {
DoContinueRecursion = true
});
// then we visit the PropChildThree top level prop
A.CallTo(() => listener.OnProperty(GetProp(type, "PropChildThree"), A <Func <object> > ._, A <InstanceTraversalContext> ._))
.Invokes(x =>
{
var ctx = (InstanceTraversalContext)x.Arguments[2];
Assert.Equal(0, ctx.CurrentDepth);
callCounts[".PropChildThree"]++;
})
.Returns(new SimpleInstanceListenerOnFieldOrPropResult {
DoContinueRecursion = true
});
// next up is PropChildThree.ChildThreeString
A.CallTo(() => listener.OnProperty(GetProp(child3Type, "ChildThreeString"), A <Func <object> > ._, A <InstanceTraversalContext> ._))
.Invokes(x =>
{
var ctx = (InstanceTraversalContext)x.Arguments[2];
Assert.Equal(1, ctx.CurrentDepth);
Assert.Equal("PropChildThree", ctx.BreadcrumbAsString);
callCounts["PropChildThree.ChildThreeString"]++;
})
.Returns(new SimpleInstanceListenerOnFieldOrPropResult {
DoContinueRecursion = true
});
// next up is PropChildThree.ChildTwo
A.CallTo(() => listener.OnProperty(GetProp(child3Type, "ChildTwo"), A <Func <object> > ._, A <InstanceTraversalContext> ._))
.Invokes(x =>
{
var ctx = (InstanceTraversalContext)x.Arguments[2];
Assert.Equal(1, ctx.CurrentDepth);
Assert.Equal("PropChildThree", ctx.BreadcrumbAsString);
callCounts["PropChildThree.ChildTwo"]++;
})
.Returns(new SimpleInstanceListenerOnFieldOrPropResult {
DoContinueRecursion = true
});
Traverser.TraverseInstance(victim, 5, listener);
// all "methods" should have been called exactly once
foreach (var(key, value) in callCounts)
{
// this sillyness provides us with a hint for which thing was not called as expected
Assert.Equal($"{key}=1", $"{key}={value}");
}
}
