mirror of https://github.com/oliverbooth/X10D
74 lines
2.9 KiB
C#
74 lines
2.9 KiB
C#
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using Microsoft.VisualStudio.TestTools.UnitTesting;
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using X10D.IO;
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namespace X10D.Tests.IO;
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public partial class StreamTests
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{
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[TestMethod]
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[CLSCompliant(false)]
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public void WriteUInt64_ShouldThrowArgumentException_GivenNonWriteableStream()
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{
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Stream stream = new DummyStream();
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Assert.ThrowsException<ArgumentException>(() => stream.Write(420UL, Endianness.LittleEndian));
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Assert.ThrowsException<ArgumentException>(() => stream.Write(420UL, Endianness.BigEndian));
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}
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[TestMethod]
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[CLSCompliant(false)]
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public void WriteUInt64_ShouldThrowArgumentNullException_GivenNullStream()
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{
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Stream stream = null!;
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Assert.ThrowsException<ArgumentNullException>(() => stream.Write(420UL, Endianness.LittleEndian));
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Assert.ThrowsException<ArgumentNullException>(() => stream.Write(420UL, Endianness.BigEndian));
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}
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[TestMethod]
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[CLSCompliant(false)]
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public void WriteUInt64_ShouldThrowArgumentOutOfRangeException_GivenInvalidEndiannessValue()
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{
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// we don't need to enclose this stream in a using declaration, since disposing a
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// null stream is meaningless. NullStream.Dispose actually does nothing, anyway.
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// that - coupled with the fact that encapsulating the stream in a using declaration causes the
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// analyser to trip up and think the stream is disposed by the time the local is captured in
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// assertion lambda - means this line is fine as it is. please do not change.
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Stream stream = Stream.Null;
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Assert.ThrowsException<ArgumentOutOfRangeException>(() => stream.Write(420UL, (Endianness)(-1)));
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Assert.ThrowsException<ArgumentOutOfRangeException>(() => stream.Write(420UL, (Endianness)(-1)));
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}
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[TestMethod]
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[CLSCompliant(false)]
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public void WriteUInt64_ShouldWriteBigEndian_GivenBigEndian()
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{
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using var stream = new MemoryStream();
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stream.Write(420UL, Endianness.BigEndian);
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Assert.AreEqual(8, stream.Position);
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stream.Position = 0;
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Span<byte> actual = stackalloc byte[8];
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ReadOnlySpan<byte> expected = stackalloc byte[] {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xA4};
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int read = stream.Read(actual);
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Assert.AreEqual(8, read);
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CollectionAssert.AreEqual(expected.ToArray(), actual.ToArray());
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}
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[TestMethod]
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[CLSCompliant(false)]
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public void WriteUInt64_ShouldWriteLittleEndian_GivenLittleEndian()
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{
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using var stream = new MemoryStream();
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stream.Write(420UL, Endianness.LittleEndian);
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Assert.AreEqual(8, stream.Position);
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stream.Position = 0;
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Span<byte> actual = stackalloc byte[8];
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ReadOnlySpan<byte> expected = stackalloc byte[] {0xA4, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
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int read = stream.Read(actual);
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Assert.AreEqual(8, read);
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CollectionAssert.AreEqual(expected.ToArray(), actual.ToArray());
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}
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}
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