Adds test skeleton.

data-extraction/test/main.test.ts

@@ -0,0 +1,16 @@
+import {
+	getDataExtractorApi,
+	DataExtractorApiImpl,
+} from "@hediet/debug-visualizer-data-extraction";
+
+describe("extractor", () => {
+	it("should not crash", () => {
+		const dataExtractor = new DataExtractorApiImpl();
+		dataExtractor.registerDefaultExtractors();
+		const result = dataExtractor.getData(
+			() => [1, 2, 3],
+			() => null!,
+			undefined
+		);
+	});
+});