PropertiesTests.cs

namespace CSharpInteractive.Tests;

public class PropertiesTests
{
    private readonly Mock<ILog<Properties>> _log;
    private readonly Mock<ISettings> _settings;
    private readonly Dictionary<string, string> _scriptProperties = new();

    public PropertiesTests()
    {
        _log = new Mock<ILog<Properties>>();
        _settings = new Mock<ISettings>();
        _settings.SetupGet(i => i.ScriptProperties).Returns(_scriptProperties);
    }

    [Fact]
    public void ShouldInit()
    {
        // Given
        _scriptProperties["Abc"] = "Xyz";
        _scriptProperties["11"] = " ";
        _scriptProperties["Xyz"] = string.Empty;
        var props = CreateInstance();

        // When

        // Then
        props.Count.ShouldBe(2);
    }

    [Fact]
    public void ShouldSupportIndexedGetter()
    {
        // Given
        _scriptProperties["Abc"] = "Xyz";
        var props = CreateInstance();

        // When
        var val = props["Abc"];

        // Then
        val.ShouldBe("Xyz");
    }

    [Fact]
    public void ShouldSupportTryGetValue()
    {
        // Given
        _scriptProperties["Abc"] = "Xyz";
        var props = CreateInstance();

        // When
        props.TryGetValue("Abc", out var val).ShouldBeTrue();

        // Then
        val.ShouldBe("Xyz");
    }

    [Fact]
    public void ShouldSupportIndexedSetter()
    {
        // Given
        var props = CreateInstance();

        // When
        props["Abc"] = "Xyz";
        var val = props["Abc"];

        // Then
        val.ShouldBe("Xyz");
        props.Count.ShouldBe(1);
    }

    [Fact]
    public void ShouldGetEmptyStringWhenNoValue()
    {
        // Given
        var props = CreateInstance();

        // When
        var val = props["Abc"];

        // Then
        val.ShouldBe(string.Empty);
    }

    [Fact]
    public void ShouldSupportTryGetValueWhenNoValue()
    {
        // Given
        var props = CreateInstance();

        // When
        var result = props.TryGetValue("Abc", out _);

        // Then
        result.ShouldBeFalse();
    }

    [Fact]
    public void ShouldEnumeratePairs()
    {
        // Given
        _scriptProperties["Abc"] = "Xyz";
        _scriptProperties["1"] = "2";
        var props = CreateInstance();

        // When

        // Then
        props.ToArray().ShouldBe([
            new KeyValuePair<string, string>("Abc", "Xyz"),
            new KeyValuePair<string, string>("1", "2")
        ]);
    }

    [Fact]
    public void ShouldRemoveStringWhenSetEmptyValue()
    {
        // Given
        _scriptProperties["Abc"] = "Xyz";
        var props = CreateInstance();

        // When
        props["Abc"] = string.Empty;

        // Then
        props["Abc"].ShouldBe(string.Empty);
        props.Count.ShouldBe(0);
    }

    private Properties CreateInstance() =>
        new(_log.Object, _settings.Object);
}