Add test coverage to identifyTargetId

packages/devices/tests/identifyTargetId.test.js

@@ -0,0 +1,23 @@
+// @flow
+import { identifyTargetId } from "../src/";
+
+test("check that known targetIds match known devices", () => {
+  const knownTargetIds = {
+    nanoS: [823132162, 823132163, 823132164],
+    nanoX: [855638020],
+    blue: [822149124],
+  };
+
+  for (const modelId in knownTargetIds) {
+    const ids = knownTargetIds[modelId];
+    ids.forEach((id) => {
+      const deviceModel = identifyTargetId(id);
+      expect(deviceModel?.id).toBe(modelId);
+    });
+  }
+});
+
+test("check that unknown targetId is undefined", () => {
+  const shouldBeUndefiend = identifyTargetId(0x123456789);
+  expect(shouldBeUndefiend?.id).toBeFalsy();
+});