sebastienros.jint/Jint.Tests/Runtime/ObjectInstanceTests.cs

using Jint.Native;

namespace Jint.Tests.Runtime;

public class ObjectInstanceTests
{
    [Fact]
    public void RemovingFirstPropertyFromObjectInstancePropertiesBucketAndEnumerating()
    {
        var engine = new Engine();
        var instance = new JsObject(engine);
        instance.FastSetDataProperty("bare", JsValue.Null);
        instance.FastSetDataProperty("scope", JsValue.Null);
        instance.RemoveOwnProperty("bare");
        var propertyNames = instance.GetOwnProperties().Select(x => x.Key).ToList();
        Assert.Equal(new JsValue[] { "scope" }, propertyNames);
    }

    [Theory]
    [InlineData("Array")]
    [InlineData("Boolean")]
    [InlineData("Date")]
    [InlineData("Error")]
    [InlineData("Number")]
    [InlineData("Object")]
    [InlineData("String")]
    public void ExtendingObjects(string baseType)
    {
        var code = $@"
                class My{baseType} extends {baseType} {{
                    constructor(...args) {{
                        super(...args);
                    }} 
                }}
                const o = new My{baseType}();
                o.constructor === My{baseType}";

        var engine = new Engine();
        Assert.True(engine.Evaluate(code).AsBoolean());
    }

    [Fact]
    public void ShouldHavePrototypeInPlaceByDefault()
    {
        var engine = new Engine();
        var instance = new JsObject(engine);
        Assert.NotNull(instance.GetPrototypeOf());
        Assert.Equal("[object Object]", instance.ToString());
    }
}