Added spec for native app menu

test/unit/specs/__snapshots__/menu.spec.js.snap

@@ -0,0 +1,56 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`App Menu should create the app menu 1`] = `
+Array [
+  Array [
+    Array [
+      Object {
+        "label": "Cosmos Voyager",
+        "submenu": Array [
+          Object {
+            "click": [Function],
+            "label": "About Cosmos Voyager",
+            "selector": "orderFrontStandardAboutPanel:",
+          },
+          Object {
+            "type": "separator",
+          },
+          Object {
+            "accelerator": "Command+Q",
+            "click": [Function],
+            "label": "Quit",
+          },
+        ],
+      },
+      Object {
+        "label": "Edit",
+        "submenu": Array [
+          Object {
+            "accelerator": "CmdOrCtrl+X",
+            "label": "Cut",
+            "selector": "cut:",
+          },
+          Object {
+            "accelerator": "CmdOrCtrl+C",
+            "label": "Copy",
+            "selector": "copy:",
+          },
+          Object {
+            "accelerator": "CmdOrCtrl+V",
+            "label": "Paste",
+            "selector": "paste:",
+          },
+        ],
+      },
+    ],
+  ],
+]
+`;
+
+exports[`App Menu should create the app menu 2`] = `
+Array [
+  Array [
+    undefined,
+  ],
+]
+`;

test/unit/specs/menu.spec.js

@@ -0,0 +1,74 @@
+const { join } = require("path")
+
+let mainWindow
+describe("App Menu", () => {
+  beforeEach(() => {
+    jest.resetModules()
+    jest.unmock("electron")
+
+    mainWindow = {
+      webContents: { send: jest.fn() }
+    }
+
+    jest.mock("electron", () => ({
+      Menu: {
+        buildFromTemplate: jest.fn(menu => {
+          menu
+        }),
+        setApplicationMenu: jest.fn()
+      },
+      app: {
+        quit: jest.fn()
+      }
+    }))
+
+    let createMenu = require("../../../app/src/main/menu.js")
+
+    createMenu(mainWindow)
+  })
+
+  it("should create the app menu", function() {
+    expect(
+      require("electron").Menu.buildFromTemplate.mock.calls
+    ).toMatchSnapshot()
+    expect(
+      require("electron").Menu.setApplicationMenu.mock.calls
+    ).toMatchSnapshot()
+  })
+
+  it("should quit app when clicking Quit menu item", function() {
+    let menu = require("electron").Menu.buildFromTemplate.mock.calls[0][0]
+    let quitItem = menu
+      .find(({ label }) => label === "Cosmos Voyager")
+      .submenu.find(({ label }) => label === "Quit")
+
+    expect(require("electron").app.quit.mock.calls.length).toBe(0)
+    quitItem.click()
+    expect(require("electron").app.quit.mock.calls.length).toBe(1)
+  })
+
+  it("should send 'open-about-menu' when clicking 'About'", function() {
+    process.platform = "linux"
+    let menu = require("electron").Menu.buildFromTemplate.mock.calls[0][0]
+    let aboutItem = menu
+      .find(({ label }) => label === "Cosmos Voyager")
+      .submenu.find(({ label }) => label === "About Cosmos Voyager")
+
+    expect(mainWindow.webContents.send.mock.calls.length).toBe(0)
+    aboutItem.click()
+    expect(mainWindow.webContents.send.mock.calls.length).toBe(1)
+    expect(mainWindow.webContents.send.mock.calls[0][0]).toBe("open-about-menu")
+  })
+
+  it("should not send 'open-about-menu' when clicking 'About' on mac", function() {
+    process.platform = "darwin"
+    let menu = require("electron").Menu.buildFromTemplate.mock.calls[0][0]
+    let aboutItem = menu
+      .find(({ label }) => label === "Cosmos Voyager")
+      .submenu.find(({ label }) => label === "About Cosmos Voyager")
+
+    expect(mainWindow.webContents.send.mock.calls.length).toBe(0)
+    aboutItem.click()
+    expect(mainWindow.webContents.send.mock.calls.length).toBe(0)
+  })
+})