using Shouldly;
using Xunit;
using ZB.MOM.WW.OtOpcUa.Client.CLI.Helpers;

namespace ZB.MOM.WW.OtOpcUa.Client.CLI.Tests;

/// <summary>Array-valued nodes print their elements, not the CLR type name (#615 G9: <c>ServerArray</c> read as <c>System.String[]</c>).</summary>
public class ValueFormatterTests
{
    /// <summary>A string array (e.g. ServerArray i=2254) prints its elements in order.</summary>
    [Fact]
    public void String_array_prints_elements() =>
        ValueFormatter.Format(new[] { "urn:OtOpcUa:central-1", "urn:OtOpcUa:central-2" })
            .ShouldBe("[urn:OtOpcUa:central-1, urn:OtOpcUa:central-2]");

    /// <summary>An empty array prints as <c>[]</c>, distinguishable from a null value.</summary>
    [Fact]
    public void Empty_array_prints_brackets() => ValueFormatter.Format(Array.Empty<string>()).ShouldBe("[]");

    /// <summary>Numeric arrays use the invariant culture.</summary>
    [Fact]
    public void Numeric_array_is_invariant() => ValueFormatter.Format(new[] { 1.5, 2.25 }).ShouldBe("[1.5, 2.25]");

    /// <summary>A byte string prints as hex rather than a list of bytes.</summary>
    [Fact]
    public void Byte_string_prints_hex() => ValueFormatter.Format(new byte[] { 0x0A, 0xFF }).ShouldBe("0x0AFF");

    /// <summary>A string is not treated as a collection of characters.</summary>
    [Fact]
    public void String_is_not_enumerated() => ValueFormatter.Format("abc").ShouldBe("abc");

    /// <summary>Scalars and null keep their plain rendering.</summary>
    [Fact]
    public void Scalars_and_null() { ValueFormatter.Format(250).ShouldBe("250"); ValueFormatter.Format(null).ShouldBe(""); }
}