[Test] public void EmptyLookup()
{
// Initializing with both an empty array and null should be fine
Assert.DoesNotThrow(() => new FontKerningLookup(new FontKerningPair[0]));
Assert.DoesNotThrow(() => new FontKerningLookup(null));
// Check if the lookup works and expectedly returns zero values
FontKerningLookup lookup = new FontKerningLookup(null);
Assert.AreEqual(0.0f, lookup.GetAdvanceOffset('a', 'b'));
Assert.AreEqual(0.0f, lookup.GetAdvanceOffset('b', 'a'));
}
[Test] public void SingleItemLookup()
{
// A lookup where each pair is completely unique - the easiest case
FontKerningLookup lookup = new FontKerningLookup(new FontKerningPair[]
{
new FontKerningPair('a', 'b', 1.0f),
new FontKerningPair('c', 'd', 2.0f),
new FontKerningPair('e', 'f', 3.0f),
});
Assert.AreEqual(0.0f, lookup.GetAdvanceOffset('x', 'y'));
Assert.AreEqual(1.0f, lookup.GetAdvanceOffset('a', 'b'));
Assert.AreEqual(2.0f, lookup.GetAdvanceOffset('c', 'd'));
Assert.AreEqual(3.0f, lookup.GetAdvanceOffset('e', 'f'));
}
[Test] public void MultiItemLookup()
{
// A lookup where there are multiple pairs sharing the same items
FontKerningPair[] pairs = new FontKerningPair[]
{
new FontKerningPair('a', 'a', 1.0f),
new FontKerningPair('a', 'b', 2.0f),
new FontKerningPair('a', 'c', 3.0f),
new FontKerningPair('b', 'a', 4.0f),
new FontKerningPair('b', 'b', 5.0f),
new FontKerningPair('b', 'c', 6.0f),
new FontKerningPair('c', 'a', 7.0f),
new FontKerningPair('c', 'b', 8.0f),
new FontKerningPair('c', 'c', 9.0f),
};
// Shuffle the pairs array, as they are no expected to be in order
Random rnd = new Random(1);
rnd.Shuffle(pairs);
FontKerningLookup lookup = new FontKerningLookup(pairs);
Assert.AreEqual(0.0f, lookup.GetAdvanceOffset('x', 'y'));
Assert.AreEqual(1.0f, lookup.GetAdvanceOffset('a', 'a'));
Assert.AreEqual(2.0f, lookup.GetAdvanceOffset('a', 'b'));
Assert.AreEqual(3.0f, lookup.GetAdvanceOffset('a', 'c'));
Assert.AreEqual(4.0f, lookup.GetAdvanceOffset('b', 'a'));
Assert.AreEqual(5.0f, lookup.GetAdvanceOffset('b', 'b'));
Assert.AreEqual(6.0f, lookup.GetAdvanceOffset('b', 'c'));
Assert.AreEqual(7.0f, lookup.GetAdvanceOffset('c', 'a'));
Assert.AreEqual(8.0f, lookup.GetAdvanceOffset('c', 'b'));
Assert.AreEqual(9.0f, lookup.GetAdvanceOffset('c', 'c'));
}
