Add tests

Fix #4

jest.config.js

@@ -0,0 +1,7 @@
+module.exports = {
+  preset: 'ts-jest',
+  testEnvironment: "jsdom",
+  "moduleNameMapper": {
+    "^~/(.*)$": "<rootDir>/src/js/$1"
+  }
+};

src/js/lib/response.ts

@@ -1,6 +1,5 @@
 export type TResponse = {
   IPAddress: string;
-  Location: string;
   ISP: string;
   City: string;
   Country: string;
@@ -20,7 +19,6 @@ export function Response(res: TServerResponse): TResponse {
   const self = Object.create(null);
 
   self.IPAddress = res.YourFuckingIPAddress;
-  self.Location = res.YourFuckingLocation;
   self.ISP = res.YourFuckingISP;
   self.City = res.YourFuckingCity;
   self.Country =  res.YourFuckingCountry;

test/ErrorRenderer.test.tsx

@@ -0,0 +1,24 @@
+import React from "react";
+import '@testing-library/jest-dom'
+import { render, screen } from "@testing-library/react";
+import { ErrorRenderer } from "~/components/ErrorRenderer";
+import { getMessage } from "./mocks/chrome.i18n";
+
+describe("ErrorRenderer.tsx", () => {
+  const error = new Error("This is an example error message");
+
+  beforeEach(() => {
+    const chrome: any = {i18n: {getMessage}};
+    global.chrome = chrome;
+    render(<ErrorRenderer error={error}/>);
+  });
+
+  afterEach(() => {
+    global.chrome = undefined;
+  });
+
+  test("an error is rendered", () => {
+    expect(screen.getByText("Error")).toBeInTheDocument();
+    expect(screen.getByText(error.message)).toBeInTheDocument();
+  });
+});

test/ResponseRenderer.test.tsx

@@ -0,0 +1,70 @@
+import React from "react";
+import '@testing-library/jest-dom'
+import { render, screen } from "@testing-library/react";
+import { ResponseRenderer } from "~/components/ResponseRenderer";
+import { getMessage } from "./mocks/chrome.i18n";
+
+describe("ResponseRenderer.tsx", () => {
+  beforeEach(() => {
+    const chrome: any = {i18n: {getMessage}};
+    global.chrome = chrome;
+  });
+
+  afterEach(() => {
+    global.chrome = undefined;
+  });
+
+  const defaultResponse = {
+    IPAddress: "89.222.123.45",
+    ISP: "FooBar Ltd",
+    City: "FooBar City",
+    Country: "United States of FooBar",
+    isTorExitNode: false
+  };
+
+  describe("when isTorExitNode is false", () => {
+    const response = {...defaultResponse};
+
+    beforeEach(() => {
+      render(<ResponseRenderer response={response}/>);
+    });
+
+    test("an IP address is rendered", () => {
+      expect(screen.getByText("IP Address")).toBeInTheDocument();
+      expect(screen.getByText(response.IPAddress)).toBeInTheDocument();
+    });
+
+    test("an ISP is rendered", () => {
+      expect(screen.getByText("ISP")).toBeInTheDocument();
+      expect(screen.getByText(response.ISP)).toBeInTheDocument();
+    });
+
+    test("a city is rendered", () => {
+      expect(screen.getByText("City")).toBeInTheDocument();
+      expect(screen.getByText(response.City)).toBeInTheDocument();
+    });
+
+    test("a country is rendered", () => {
+      expect(screen.getByText("Country")).toBeInTheDocument();
+      expect(screen.getByText(response.Country)).toBeInTheDocument();
+    });
+
+    test("isTorExitNode is rendered as No", () => {
+      expect(screen.getByText("Tor exit node")).toBeInTheDocument();
+      expect(screen.getByText("No")).toBeInTheDocument();
+    });
+  });
+
+  describe("when isTorExitNode is true", () => {
+    const response = {...defaultResponse, isTorExitNode: true};
+
+    beforeEach(() => {
+      render(<ResponseRenderer response={response}/>);
+    });
+
+    test("isTorExitNode is rendered as Yes", () => {
+      expect(screen.getByText("Tor exit node")).toBeInTheDocument();
+      expect(screen.getByText("Yes")).toBeInTheDocument();
+    })
+  });
+});

test/mocks/chrome.i18n.ts

@@ -0,0 +1,8 @@
+import { readFileSync } from "fs";
+import path from "path";
+
+export function getMessage(key: string) {
+  const buf = readFileSync(path.resolve("src/_locales/en/messages.json"));
+  const messages = JSON.parse(buf.toString());
+  return messages[key].message;
+}

tsconfig.json

@@ -10,8 +10,8 @@
     "jsx": "react",
     "allowJs": true,
     "lib": [ "ES2020", "DOM" ],
-
     "baseUrl": "src/",
     "paths": { "~/*": ["js/*"] },
+    "types": ["node", "jest", "@testing-library/jest-dom", "@types/chrome"]
   }
 }