Add testcase - findNodeByName - one test

test/findNodeByName-basic.spec.tsx

@@ -0,0 +1,41 @@
+import React from "react";
+
+// Import stuff from src
+import { findNodeByComponentName } from "../src";
+
+// Import test helpers and sample components
+import { mountAndGetRootNode } from "./utils/mount-in-enzyme";
+import CDepth1 from "./sample-components/depth-1-simple";
+import { FiberNodeForComponentClass } from "../src/mocked-types";
+
+describe("findNodeByComponentName", () => {
+  let container: HTMLDivElement;
+
+  beforeEach(() => {
+    container = document.body.appendChild(document.createElement("div"));
+  });
+
+  afterEach(() => {
+    document.body.removeChild(container);
+  });
+
+  describe("basic", () => {
+    it("should work for top-level name", () => {
+      // TODO: Move this to a helper function
+      class WrappedC extends React.Component {
+        render() {
+          return <CDepth1 />;
+        }
+      }
+      const rootNode = mountAndGetRootNode(WrappedC, container);
+
+      const found = findNodeByComponentName(rootNode, CDepth1.name);
+
+      // Shouldn't be null, or other falsy value
+      expect(found).not.toBeFalsy();
+      expect((found as FiberNodeForComponentClass).stateNode).toBeInstanceOf(
+        CDepth1
+      );
+    });
+  });
+});