Joseph Doherty
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Adds <summary>, <param>, <typeparam>, and <inheritdoc/> tags to public members surfaced by commentchecker — resolves 5,847 of 5,869 issues (99.6%) across three /fixdocs passes.
82 lines
3.7 KiB
C#
82 lines
3.7 KiB
C#
using Shouldly;
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using Xunit;
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namespace ZB.MOM.WW.OtOpcUa.Driver.Modbus.Tests;
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/// <summary>
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/// Coverage for the new ByteSwap (BADC) and FullReverse (DCBA) byte orders added by #137.
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/// The existing BigEndian (ABCD) and WordSwap (CDAB) cases live in <see cref="ModbusDataTypeTests"/>.
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/// </summary>
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[Trait("Category", "Unit")]
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public sealed class ModbusByteOrderTests
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{
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/// <summary>Verifies that Int32 values decode correctly with ByteSwap (BADC) byte order.</summary>
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[Fact]
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public void Int32_ByteSwap_decodes_BADC_layout()
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{
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// Value 0x12345678. PLC stores bytes within each register swapped:
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// register[0] = 0x3412, register[1] = 0x7856 → wire [0x34, 0x12, 0x78, 0x56].
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var tag = new ModbusTagDefinition("T", ModbusRegion.HoldingRegisters, 0, ModbusDataType.Int32,
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ByteOrder: ModbusByteOrder.ByteSwap);
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var bytes = new byte[] { 0x34, 0x12, 0x78, 0x56 };
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ModbusDriver.DecodeRegister(bytes, tag).ShouldBe(0x12345678);
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}
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/// <summary>Verifies that Int32 values decode correctly with FullReverse (DCBA) byte order.</summary>
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[Fact]
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public void Int32_FullReverse_decodes_DCBA_layout()
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{
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// Value 0x12345678 stored fully little-endian:
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// wire [0x78, 0x56, 0x34, 0x12].
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var tag = new ModbusTagDefinition("T", ModbusRegion.HoldingRegisters, 0, ModbusDataType.Int32,
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ByteOrder: ModbusByteOrder.FullReverse);
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var bytes = new byte[] { 0x78, 0x56, 0x34, 0x12 };
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ModbusDriver.DecodeRegister(bytes, tag).ShouldBe(0x12345678);
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}
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/// <summary>Verifies that Float32 values roundtrip correctly with all byte orders.</summary>
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/// <param name="order">The byte order to test.</param>
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[Theory]
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[InlineData(ModbusByteOrder.BigEndian)]
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[InlineData(ModbusByteOrder.WordSwap)]
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[InlineData(ModbusByteOrder.ByteSwap)]
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[InlineData(ModbusByteOrder.FullReverse)]
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public void Float32_All_ByteOrders_Roundtrip(ModbusByteOrder order)
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{
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var tag = new ModbusTagDefinition("T", ModbusRegion.HoldingRegisters, 0, ModbusDataType.Float32, ByteOrder: order);
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var wire = ModbusDriver.EncodeRegister(3.14159f, tag);
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wire.Length.ShouldBe(4);
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ModbusDriver.DecodeRegister(wire, tag).ShouldBe(3.14159f);
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}
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/// <summary>Verifies that Float64 values roundtrip correctly with all byte orders.</summary>
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/// <param name="order">The byte order to test.</param>
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[Theory]
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[InlineData(ModbusByteOrder.BigEndian)]
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[InlineData(ModbusByteOrder.WordSwap)]
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[InlineData(ModbusByteOrder.ByteSwap)]
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[InlineData(ModbusByteOrder.FullReverse)]
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public void Float64_All_ByteOrders_Roundtrip(ModbusByteOrder order)
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{
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var tag = new ModbusTagDefinition("T", ModbusRegion.HoldingRegisters, 0, ModbusDataType.Float64, ByteOrder: order);
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var wire = ModbusDriver.EncodeRegister(2.718281828459045d, tag);
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wire.Length.ShouldBe(8);
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ModbusDriver.DecodeRegister(wire, tag).ShouldBe(2.718281828459045d);
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}
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/// <summary>Verifies that Int32 values roundtrip correctly with all byte orders.</summary>
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/// <param name="order">The byte order to test.</param>
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[Theory]
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[InlineData(ModbusByteOrder.BigEndian)]
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[InlineData(ModbusByteOrder.WordSwap)]
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[InlineData(ModbusByteOrder.ByteSwap)]
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[InlineData(ModbusByteOrder.FullReverse)]
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public void Int32_All_ByteOrders_Roundtrip(ModbusByteOrder order)
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{
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var tag = new ModbusTagDefinition("T", ModbusRegion.HoldingRegisters, 0, ModbusDataType.Int32, ByteOrder: order);
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var wire = ModbusDriver.EncodeRegister(unchecked((int)0xDEADBEEF), tag);
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wire.Length.ShouldBe(4);
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ModbusDriver.DecodeRegister(wire, tag).ShouldBe(unchecked((int)0xDEADBEEF));
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}
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}
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