public void ItemMap_ConvertMerging()
{
// Build an empty map
SampleSet set = new SampleSet();
ItemMap <SampleItem> map = new ItemMap <SampleItem>(set);
// Add initial links, including IDs with no links and dupes
map.AddLink(1, 2);
map.AddLink(2, 3);
map.AddLink(2, 4);
map.AddLink(2, 4);
map.AddLink(6, 4);
// Verify Save and Reload has no errors
ItemMap <SampleItem> readMap = new ItemMap <SampleItem>(new SampleSet());
Verify.RoundTrip(map, readMap);
map = readMap;
// Validate links
Assert.AreEqual("2", StringExtensions.Join(", ", map.LinksFrom(1)));
Assert.AreEqual("3, 4", StringExtensions.Join(", ", map.LinksFrom(2)));
Assert.AreEqual("4", StringExtensions.Join(", ", map.LinksFrom(6)));
// Add links (after roundtrip), including before first mutable group, new links to existing group, and new groups
map.AddLink(0, 1);
map.AddLink(2, 5);
map.AddLink(2, 3);
map.AddLink(2, 1);
map.AddLink(4, 5);
// Verify Save and Reload has no errors (merging happens)
readMap = new ItemMap <SampleItem>(new SampleSet());
Verify.RoundTrip(map, readMap);
map = readMap;
// Validate all links were in the merged set
Assert.AreEqual("1", StringExtensions.Join(", ", map.LinksFrom(0)));
Assert.AreEqual("2", StringExtensions.Join(", ", map.LinksFrom(1)));
Assert.AreEqual("3, 4, 5, 1", StringExtensions.Join(", ", map.LinksFrom(2)));
Assert.AreEqual("5", StringExtensions.Join(", ", map.LinksFrom(4)));
Assert.AreEqual("4", StringExtensions.Join(", ", map.LinksFrom(6)));
}
public void ItemMap_Basics()
{
SampleSet set = new SampleSet();
// Build an empty map
ItemMap <SampleItem> map = new ItemMap <SampleItem>(set);
// Verify search before save doesn't work
Verify.Exception <InvalidOperationException>(() => map.LinksFrom(0));
// Verify Save and Reload has no errors
ItemMap <SampleItem> readMap = new ItemMap <SampleItem>(new SampleSet());
Verify.RoundTrip(map, readMap);
map = readMap;
// Verify search returns a valid but empty set from an empty map
Assert.AreEqual(0, map.LinksFrom(0).Count);
// Rebuild map
map = new ItemMap <SampleItem>(set);
// Add links (in order and out of order)
map.AddLink(0, 1);
map.AddLink(0, 2);
map.AddLink(1, 2);
map.AddLink(2, 3);
map.AddLink(4, 0);
// Add duplicate links
map.AddLink(1, 2);
map.AddLink(1, 2);
// Save, then add links after conversion (verify error)
readMap = new ItemMap <SampleItem>(new SampleSet());
Verify.RoundTrip(map, readMap);
map = readMap;
// Ask for links (valid item with no links)
Assert.AreEqual(0, map.LinksFrom(3).Count);
// Ask for links (item with one link)
Assert.AreEqual("3", StringExtensions.Join(", ", map.LinksFrom(2)));
Assert.AreEqual(1, map.LinkCountFrom(2));
// Ask for links (item with many links)
Assert.AreEqual("1, 2", StringExtensions.Join(", ", map.LinksFrom(0)));
Assert.AreEqual(2, map.LinkCountFrom(0));
// Ask for links (verify no duplicates)
Assert.AreEqual("2", StringExtensions.Join(", ", map.LinksFrom(1)));
// Ask for links (first and last items)
Assert.AreEqual("1, 2", StringExtensions.Join(", ", map.LinksFrom(0)));
Assert.AreEqual(2, map.LinkCountFrom(0));
Assert.AreEqual("0", StringExtensions.Join(", ", map.LinksFrom(4)));
Assert.AreEqual(1, map.LinkCountFrom(4));
// Ask for links (unknown item) (verify error)
Assert.AreEqual("", StringExtensions.Join(", ", map.LinksFrom(5)));
Assert.AreEqual(0, map.LinkCountFrom(5));
// MapEnumerator.Reset works (and Dispose works)
using (MapEnumerator <SampleItem> links = map.LinksFrom(0))
{
while (links.MoveNext())
{
;
}
Assert.AreEqual("", StringExtensions.Join(", ", links));
links.Reset();
Assert.AreEqual("1, 2", StringExtensions.Join(", ", links));
}
// MapEnumerator.GetCurrent untyped works.
IEnumerator untypedLinks = map.LinksFrom(0);
untypedLinks.MoveNext();
object first = untypedLinks.Current;
Assert.AreEqual("1", first.ToString());
}