add tests

starsky/starsky/clientapp/src/shared/keyboard.spec.ts

@@ -5,6 +5,14 @@ describe("keyboard", () => {
   describe("isInForm", () => {
     it("null input", () => {
       // new EventTarget() = not supported in Safari
+
+      const result = keyboard.isInForm(undefined);
+
+      expect(result).toBeNull();
+    });
+
+    it("null input 2", () => {
+      // new EventTarget() = not supported in Safari
       const eventTarget: EventTarget = new EventTarget();
       const event = new KeyboardEvent("keydown", {
         keyCode: 37,
@@ -52,6 +60,47 @@ describe("keyboard", () => {
   });
 
   describe("SetFocusOnEndField", () => {
+    it("no child items", () => {
+      const focusSpy = jest.fn();
+      new Keyboard().SetFocusOnEndField({
+        focus: focusSpy,
+        childNodes: []
+      } as unknown as HTMLDivElement);
+
+      expect(focusSpy).toHaveBeenCalledTimes(1);
+    });
+
+    it("text content", () => {
+      const focusSpy = jest.fn();
+      new Keyboard().SetFocusOnEndField({
+        focus: focusSpy,
+        childNodes: [{}] // text content is missing
+      } as unknown as HTMLDivElement);
+
+      expect(focusSpy).toHaveBeenCalledTimes(0);
+    });
+
+    it("missing range", () => {
+      const focusSpy = jest.fn();
+      const selectionSpy = jest.spyOn(window, "getSelection").mockImplementationOnce(() => null);
+      jest.spyOn(document, "createRange").mockImplementationOnce(() => {
+        return {
+          setStart: jest.fn(),
+          collapse: jest.fn()
+        } as unknown as Range;
+      });
+      new Keyboard().SetFocusOnEndField({
+        focus: focusSpy,
+        childNodes: [
+          {
+            textContent: "hi"
+          }
+        ]
+      } as unknown as HTMLDivElement);
+
+      expect(selectionSpy).toHaveBeenCalledTimes(1);
+    });
+
     it("input", () => {
       const target = document.createElement("div");
       target.className = "test";