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); }