h-school/tests/HSchool.Content.Tests/InheritanceTests.cs

namespace HSchool.Content.Tests;

public class InheritanceTests
{
    private readonly CatalogLoader _loader = new();

    [Fact]
    public void ChildField_ReplacesParentArrayWholesale()
    {
        var catalog = _loader.Load(
            [CatalogLoader.CorePackId],
            [
                PackDocuments.Def(CatalogLoader.CorePackId, "actions", "sit", """{ "defName": "Sit" }"""),
                PackDocuments.Def(CatalogLoader.CorePackId, "actions", "inspect", """{ "defName": "Inspect" }"""),
                PackDocuments.Def(
                    CatalogLoader.CorePackId,
                    "things",
                    "base",
                    """{ "defName": "FurnitureBase", "abstract": true, "actions": ["Sit", "Inspect"] }"""),
                PackDocuments.Def(
                    CatalogLoader.CorePackId,
                    "things",
                    "chair",
                    """{ "defName": "Chair", "parent": "FurnitureBase", "actions": ["Sit"] }"""),
            ]);

        Assert.Equal(["Sit"], catalog.Things["Chair"].Actions);
        Assert.False(catalog.Things["Chair"].Abstract);
        Assert.True(catalog.Things["FurnitureBase"].Abstract);
    }

    [Fact]
    public void CyclicParent_FailsTheCatalog()
    {
        var ex = Assert.Throws<ContentLoadException>(() => _loader.Load(
            [CatalogLoader.CorePackId],
            [
                PackDocuments.Def(CatalogLoader.CorePackId, "things", "a", """{ "defName": "A", "parent": "B" }"""),
                PackDocuments.Def(CatalogLoader.CorePackId, "things", "b", """{ "defName": "B", "parent": "A" }"""),
            ]));

        Assert.Contains("cyclic", ex.Message, StringComparison.OrdinalIgnoreCase);
    }

    [Fact]
    public void ParentOfAnotherKind_FailsTheCatalog()
    {
        var ex = Assert.Throws<ContentLoadException>(() => _loader.Load(
            [CatalogLoader.CorePackId],
            [
                PackDocuments.Def(CatalogLoader.CorePackId, "rooms", "office", """{ "defName": "Office" }"""),
                PackDocuments.Def(CatalogLoader.CorePackId, "things", "chair", """{ "defName": "Chair", "parent": "Office" }"""),
            ]));

        Assert.Contains("different kind", ex.Message, StringComparison.OrdinalIgnoreCase);
    }
}