public void Compose_3Animals_3ValidVersesAreReturned()
{
ISongWriter songWriter = new SongWriter();
string lyrics = songWriter.Compose(new Animal[]
{
new Lamb(),
new Animal("donkey", "bray"),
new Pig()
});
string expectedLyrics = @"
Old MacDonald had a farm, E - I - E - I - O,
And on his farm he had a lamb, E - I - E - I - O.
With a baa baa here and a baa baa there,
Here a baa, there a baa, ev'rywhere a baa baa.
Old MacDonald had a farm, E - I - E - I - O.
Old MacDonald had a farm, E - I - E - I - O,
And on his farm he had a donkey, E - I - E - I - O.
With a bray bray here and a bray bray there,
Here a bray, there a bray, ev'rywhere a bray bray.
Old MacDonald had a farm, E - I - E - I - O.
Old MacDonald had a farm, E - I - E - I - O,
And on his farm he had a pig, E - I - E - I - O.
With an oink oink here and an oink oink there,
Here an oink, there an oink, ev'rywhere an oink oink.
Old MacDonald had a farm, E - I - E - I - O.
";
Assert.Equal(expectedLyrics, lyrics);
}
public void Compose_2Animals_2ValidVersesAreReturned()
{
ISongWriter songWriter = new SongWriter();
string lyrics = songWriter.Compose(new Animal[]
{
new Horse(),
new Pig()
});
string expectedLyrics = @"
Old MacDonald had a farm, E - I - E - I - O,
And on his farm he had a horse, E - I - E - I - O.
With a neigh neigh here and a neigh neigh there,
Here a neigh, there a neigh, ev'rywhere a neigh neigh.
Old MacDonald had a farm, E - I - E - I - O.
Old MacDonald had a farm, E - I - E - I - O,
And on his farm he had a pig, E - I - E - I - O.
With an oink oink here and an oink oink there,
Here an oink, there an oink, ev'rywhere an oink oink.
Old MacDonald had a farm, E - I - E - I - O.
";
Assert.Equal(expectedLyrics, lyrics);
}
public void Compose_AnimalsEmpty_EmptyStringIsReturned()
{
ISongWriter songWriter = new SongWriter();
string lyrics = songWriter.Compose(new List <Animal>());
Assert.Equal(string.Empty, lyrics);
}
public void Compose_AnimalsContainsNull_ThrowsException()
{
ISongWriter songWriter = new SongWriter();
var ex = Assert.Throws <SongException>(() => songWriter.Compose(new Animal[]
{
new Cow(),
null,
new Duck()
}));
Assert.Equal("Uninitialized animal object found.", ex.Message);
}