Add testcase - utils.isNodeFunctionComponent

test/utils.isNodeFunctionComponent.spec.tsx

@@ -0,0 +1,63 @@
+// import * as React from "react";
+
+// Import stuff from src
+import { isNodeFunctionComponent } from "../src/utils";
+import { mountAndGetRootNode } from "./utils/mountInEnzyme";
+import {
+  createFunctionComponent,
+  createClassComponent
+} from "./utils/createComponent";
+
+// Import test helpers and sample components
+
+describe("utils", () => {
+  let container: HTMLDivElement;
+
+  beforeEach(() => {
+    container = document.body.appendChild(document.createElement("div"));
+  });
+
+  afterEach(() => {
+    document.body.removeChild(container);
+  });
+
+  describe("isNodeFunctionComponent", () => {
+    it("should work for function component", () => {
+      const fn1 = createFunctionComponent("fn1");
+      const rootNode = mountAndGetRootNode(fn1, container);
+
+      const result = isNodeFunctionComponent(rootNode);
+
+      expect(result).not.toBeFalsy();
+      expect(result).toBe(true);
+    });
+
+    it("should not work for class component", () => {
+      const C1 = createClassComponent("C1");
+      const rootNode = mountAndGetRootNode(C1, container);
+
+      const result = isNodeFunctionComponent(rootNode);
+
+      expect(result).toBeFalsy();
+      expect(result).toBe(false);
+    });
+
+    it("should work for html like component - div", () => {
+      const rootNode = mountAndGetRootNode("div", container);
+
+      const result = isNodeFunctionComponent(rootNode);
+
+      expect(result).toBeFalsy();
+      expect(result).toBe(false);
+    });
+
+    it("should work for html like component - svg", () => {
+      const rootNode = mountAndGetRootNode("svg", container);
+
+      const result = isNodeFunctionComponent(rootNode);
+
+      expect(result).toBeFalsy();
+      expect(result).toBe(false);
+    });
+  });
+});