public void Construction()
{
var tag = new TestObject(1);
// Value type
CheckTaggedEdge(new STaggedUndirectedEdge <int, TestObject>(1, 2, null), 1, 2, (TestObject)null);
CheckTaggedEdge(new STaggedUndirectedEdge <int, TestObject>(1, 1, null), 1, 1, (TestObject)null);
CheckTaggedEdge(default(STaggedUndirectedEdge <int, TestObject>), 0, 0, (TestObject)null);
CheckTaggedEdge(new STaggedUndirectedEdge <int, TestObject>(1, 2, tag), 1, 2, tag);
// Reference type
var v1 = new ComparableTestVertex("v1");
var v2 = new ComparableTestVertex("v2");
CheckTaggedEdge(new STaggedUndirectedEdge <ComparableTestVertex, TestObject>(v1, v2, null), v1, v2, (TestObject)null);
CheckTaggedEdge(new STaggedUndirectedEdge <ComparableTestVertex, TestObject>(v1, v1, null), v1, v1, (TestObject)null);
CheckStructTaggedEdge(default(STaggedUndirectedEdge <ComparableTestVertex, TestObject>), (ComparableTestVertex)null, null, (TestObject)null);
CheckTaggedEdge(new STaggedUndirectedEdge <ComparableTestVertex, TestObject>(v1, v2, tag), v1, v2, tag);
// Struct break the contract with their implicit default constructor
// Non struct edge should be preferred
var defaultEdge = default(STaggedUndirectedEdge <ComparableTestVertex, int>);
Assert.IsNull(defaultEdge.Source);
// ReSharper disable once HeuristicUnreachableCode
// Justification: Since struct has implicit default constructor it allows initialization of invalid edge
Assert.IsNull(defaultEdge.Target);
}
public void Construction()
{
// Value type
CheckEdge(new UndirectedEdge <int>(1, 2), 1, 2);
CheckEdge(new UndirectedEdge <int>(1, 1), 1, 1);
// Reference type
var v1 = new ComparableTestVertex("v1");
var v2 = new ComparableTestVertex("v2");
CheckEdge(new UndirectedEdge <ComparableTestVertex>(v1, v2), v1, v2);
CheckEdge(new UndirectedEdge <ComparableTestVertex>(v1, v1), v1, v1);
}
public void Construction()
{
var tag = new TestObject(1);
// Value type
CheckTaggedEdge(new TaggedUndirectedEdge <int, TestObject>(1, 2, null), 1, 2, (TestObject)null);
CheckTaggedEdge(new TaggedUndirectedEdge <int, TestObject>(1, 1, null), 1, 1, (TestObject)null);
CheckTaggedEdge(new TaggedUndirectedEdge <int, TestObject>(1, 2, tag), 1, 2, tag);
// Reference type
var v1 = new ComparableTestVertex("v1");
var v2 = new ComparableTestVertex("v2");
CheckTaggedEdge(new TaggedUndirectedEdge <ComparableTestVertex, TestObject>(v1, v2, null), v1, v2, (TestObject)null);
CheckTaggedEdge(new TaggedUndirectedEdge <ComparableTestVertex, TestObject>(v1, v1, null), v1, v1, (TestObject)null);
CheckTaggedEdge(new TaggedUndirectedEdge <ComparableTestVertex, TestObject>(v1, v2, tag), v1, v2, tag);
}
public void Construction_Throws()
{
// ReSharper disable ObjectCreationAsStatement
// ReSharper disable AssignNullToNotNullAttribute
Assert.Throws <ArgumentNullException>(() => new STaggedUndirectedEdge <TestVertex, TestObject>(null, new TestVertex("v1"), null));
Assert.Throws <ArgumentNullException>(() => new STaggedUndirectedEdge <TestVertex, TestObject>(new TestVertex("v1"), null, null));
Assert.Throws <ArgumentNullException>(() => new STaggedUndirectedEdge <TestVertex, TestObject>(null, null, null));
// ReSharper restore AssignNullToNotNullAttribute
Assert.Throws <ArgumentException>(() => new STaggedUndirectedEdge <int, TestObject>(2, 1, null));
// Not comparable
var v1 = new TestVertex("v1");
var v2 = new TestVertex("v2");
Assert.Throws <ArgumentException>(() => new STaggedUndirectedEdge <TestVertex, TestObject>(v1, v2, null));
var comparableV1 = new ComparableTestVertex("v1");
var comparableV2 = new ComparableTestVertex("v2");
Assert.Throws <ArgumentException>(() => new STaggedUndirectedEdge <ComparableTestVertex, TestObject>(comparableV2, comparableV1, null));
// ReSharper restore ObjectCreationAsStatement
}
