public void ArraySliceTests_Basics()
{
int[] sample = Enumerable.Range(100, 50).ToArray();
int[] copyToTarget = new int[100];
ArraySlice <int> slice;
// Empty ArraySlice
slice = ArraySlice <int> .Empty;
slice.Trim();
Assert.Empty(slice);
Assert.True(slice == ArraySlice <int> .Empty);
Assert.False(slice != ArraySlice <int> .Empty);
VerifyCopyTo <int>(slice, copyToTarget);
VerifyRoundTrip <int>(slice, copyToTarget);
CollectionReadVerifier.VerifySame(slice, TreeSerializer.RoundTrip(slice, TreeFormat.Binary));
CollectionReadVerifier.VerifySame(slice, TreeSerializer.RoundTrip(slice, TreeFormat.Json));
// Whole Array
slice = new ArraySlice <int>(sample);
Assert.Equal(sample.Length, slice.Count);
Assert.Equal(sample, slice);
Assert.Equal(sample[10], slice[10]);
VerifyCopyTo <int>(slice, copyToTarget);
VerifyRoundTrip <int>(slice, copyToTarget);
CollectionReadVerifier.VerifySame(slice, TreeSerializer.RoundTrip(slice, TreeFormat.Binary));
CollectionReadVerifier.VerifySame(slice, TreeSerializer.RoundTrip(slice, TreeFormat.Json));
// Array slice-to-end
slice = new ArraySlice <int>(sample, index: 10);
Assert.Equal(sample.Length - 10, slice.Count);
Assert.Equal(sample[20], slice[10]);
Assert.False(slice.Equals(sample));
VerifyCopyTo <int>(slice, copyToTarget);
VerifyRoundTrip <int>(slice, copyToTarget);
CollectionReadVerifier.VerifySame(slice, TreeSerializer.RoundTrip(slice, TreeFormat.Binary));
CollectionReadVerifier.VerifySame(slice, TreeSerializer.RoundTrip(slice, TreeFormat.Json));
// Array slice
slice = new ArraySlice <int>(sample, index: 10, length: 20);
Assert.Equal(20, slice.Count);
Assert.Equal(sample[10], slice[0]);
VerifyCopyTo <int>(slice, copyToTarget);
VerifyRoundTrip <int>(slice, copyToTarget);
CollectionReadVerifier.VerifySame(slice, TreeSerializer.RoundTrip(slice, TreeFormat.Binary));
CollectionReadVerifier.VerifySame(slice, TreeSerializer.RoundTrip(slice, TreeFormat.Json));
// Bounds checks
Assert.Throws <ArgumentNullException>(() => new ArraySlice <int>(null, 0, 0)); // Array null
Assert.Throws <ArgumentOutOfRangeException>(() => new ArraySlice <int>(sample, -1, 0)); // index < 0
Assert.Throws <ArgumentOutOfRangeException>(() => new ArraySlice <int>(sample, sample.Length + 1, 0)); // index > array.Length
Assert.Throws <ArgumentOutOfRangeException>(() => new ArraySlice <int>(sample, 0, sample.Length + 1)); // length too long
Assert.Throws <ArgumentOutOfRangeException>(() => new ArraySlice <int>(sample, 2, sample.Length + 3));
// Clear
slice.Clear();
Assert.Empty(slice);
}