mirror of https://github.com/oliverbooth/X10D
68 lines
2.6 KiB
C#
68 lines
2.6 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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public void ReadSingle_ShouldThrowArgumentException_GivenNonReadableStream()
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{
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Stream stream = new DummyStream();
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Assert.ThrowsException<ArgumentException>(() => stream.ReadSingle());
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Assert.ThrowsException<ArgumentException>(() => stream.ReadSingle(Endianness.LittleEndian));
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Assert.ThrowsException<ArgumentException>(() => stream.ReadSingle(Endianness.BigEndian));
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}
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[TestMethod]
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public void ReadSingle_ShouldThrowArgumentNullException_GivenNullStream()
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{
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Stream stream = null!;
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Assert.ThrowsException<ArgumentNullException>(() => stream.ReadSingle());
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Assert.ThrowsException<ArgumentNullException>(() => stream.ReadSingle(Endianness.LittleEndian));
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Assert.ThrowsException<ArgumentNullException>(() => stream.ReadSingle(Endianness.BigEndian));
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}
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[TestMethod]
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public void ReadSingle_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.ReadSingle((Endianness)(-1)));
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}
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[TestMethod]
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public void ReadSingle_ShouldReadBigEndian_GivenBigEndian()
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{
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using var stream = new MemoryStream();
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ReadOnlySpan<byte> bytes = stackalloc byte[] {0x43, 0xD2, 0x00, 0x00};
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stream.Write(bytes);
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stream.Position = 0;
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const float expected = 420.0f;
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float actual = stream.ReadSingle(Endianness.BigEndian);
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Assert.AreEqual(4, stream.Position);
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Assert.AreEqual(expected, actual);
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}
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[TestMethod]
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public void ReadSingle_ShouldReadLittleEndian_GivenLittleEndian()
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{
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using var stream = new MemoryStream();
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ReadOnlySpan<byte> bytes = stackalloc byte[] {0x00, 0x00, 0xD2, 0x43};
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stream.Write(bytes);
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stream.Position = 0;
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const float expected = 420.0f;
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float actual = stream.ReadSingle(Endianness.LittleEndian);
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Assert.AreEqual(4, stream.Position);
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Assert.AreEqual(expected, actual);
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}
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}
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