Made a reader for Quilt metadata

src/loaders/quilt/quilt-metadata-reader.ts

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+import { ZippedTextLoaderMetadataReader } from "@/loaders/zipped-loader-metadata-reader";
+import { QuiltMetadata } from "./quilt-metadata";
+import { QUILT_MOD_JSON, RawQuiltMetadata } from "./raw-quilt-metadata";
+/**
+ * A metadata reader that is able to read Quilt mod metadata from a zipped file.
+ */
+export class QuiltMetadataReader extends ZippedTextLoaderMetadataReader<QuiltMetadata, RawQuiltMetadata> {
+    /**
+     * Constructs a new {@link QuiltMetadataReader} instance.
+     */
+    constructor() {
+        super(QUILT_MOD_JSON, QuiltMetadata.from, JSON.parse);
+    }
+}

tests/unit/loaders/quilt/quilt-metadata-reader.spec.ts

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+import { zipFile } from "@/../tests/utils/zip-utils";
+import mockFs from "mock-fs";
+import { QuiltMetadata } from "@/loaders/quilt/quilt-metadata";
+import { QuiltMetadataReader } from "@/loaders/quilt/quilt-metadata-reader";
+
+beforeEach(async () => {
+    mockFs({
+        "quilt.mod.jar": await zipFile([__dirname, "../../../content/quilt/quilt.mod.json"]),
+        "text.txt": "",
+    });
+});
+
+afterEach(() => {
+    mockFs.restore();
+});
+
+describe("QuiltMetadataReader", () => {
+    test("successfully reads quilt.mod.json", async () => {
+        const reader = new QuiltMetadataReader();
+
+        const metadata = await reader.readMetadataFile("quilt.mod.jar");
+
+        expect(metadata).toBeInstanceOf(QuiltMetadata);
+    });
+
+    test("returns undefined if file is not a Quilt mod", async () => {
+        const reader = new QuiltMetadataReader();
+
+        const metadata = await reader.readMetadataFile("text.txt");
+
+        expect(metadata).toBeUndefined();
+    });
+
+    test("returns undefined if file does not exist", async () => {
+        const reader = new QuiltMetadataReader();
+
+        const metadata = await reader.readMetadataFile("text.json");
+
+        expect(metadata).toBeUndefined();
+    });
+});