public void CompareWithNullArguments()
{
ISortDefinition definition = new MutableSortDefinition("Nails", false, true);
Funk one = new Funk(1, "long");
PropertyComparator cmp = new PropertyComparator(definition);
Assert.AreEqual(0, cmp.Compare(null, null));
// nulls are always last (i.e. greater than)
Assert.AreEqual(1, cmp.Compare(null, one));
// any non-null instance comes before null (i.e. less than).
Assert.AreEqual(-1, cmp.Compare(one, null));
}
public void CompareWithNonExistantProperty()
{
ISortDefinition definition = new MutableSortDefinition("Deborahs.Banjo", true, true);
PropertyComparator cmp = new PropertyComparator(definition);
TestObject one = new TestObject("Rick", 19);
TestObject two = new TestObject("Balzac", 205);
Assert.Throws <InvalidPropertyException>(() => cmp.Compare(one, two));
}
public void Compare()
{
ISortDefinition definition = new MutableSortDefinition("Age", false, true);
PropertyComparator cmp = new PropertyComparator(definition);
TestObject one = new TestObject("Rick", 19);
TestObject two = new TestObject("Balzac", 205);
int actual = cmp.Compare(one, two);
Assert.IsTrue(actual < 0); // 19 is less than 205
}
public void CompareWithNullProperty()
{
ISortDefinition definition = new MutableSortDefinition("Lawyer.Company", true, true);
PropertyComparator cmp = new PropertyComparator(definition);
TestObject one = new TestObject("Rick", 19);
one.Lawyer = new NestedTestObject("Gizajoab");
TestObject two = new TestObject("Balzac", 205);
// no Lawyer.Company property set on object two...
int actual = cmp.Compare(one, two);
Assert.IsTrue(actual > 0); // Gizajoab is greater than null
}
public void CompareNestedProperty()
{
ISortDefinition definition = new MutableSortDefinition("Lawyer.Company", true, true);
PropertyComparator cmp = new PropertyComparator(definition);
TestObject one = new TestObject("Rick", 19);
one.Lawyer = new NestedTestObject("Gizajoab");
TestObject two = new TestObject("Balzac", 205);
two.Lawyer = new NestedTestObject("Wallpaperer");
int actual = cmp.Compare(one, two);
Assert.IsTrue(actual < 0); // Gizajoab is less than Wallpaperer
}
