test: Add some more test cases and turn on coverage reporting

package.json

@@ -11,7 +11,7 @@
     "tail": "^2.2.6"
   },
   "scripts": {
-    "test": "node --test",
+    "test": "node --test --experimental-test-coverage",
     "posttest": "npm run eslint",
     "eslint": "eslint ."
   },

test/simctl-extensions.js

@@ -100,6 +100,19 @@ test('start', async (ctx) => {
     t.assert.equal(console.error.mock.calls[0].arguments[0], `Could not boot simulator ${deviceId}`)
   })
 
+  await ctx.test('could not get Xcode path', (t) => {
+    t.assert ||= require('node:assert')
+
+    spawnMock.mock.mockImplementationOnce(() => ({ status: 0, stdout: 'Xcode 13.2.1' }), 0) // xcodebuild -version
+    spawnMock.mock.mockImplementationOnce(() => ({ status: 0, stdout: JSON.stringify(testJson) }), 1) // xcrun simctl list -j
+    spawnMock.mock.mockImplementationOnce(() => ({ status: 0 }), 2) // xcrun simctl boot <deviceid>
+    spawnMock.mock.mockImplementationOnce(() => ({ status: 1 }), 3) // xcode-select -p
+
+    const retObj = SimCtlExtensions.start(deviceId)
+    t.assert.equal(retObj, undefined)
+    t.assert.equal(console.error.mock.calls[0].arguments[0], 'Failed to get Xcode path')
+  })
+
   await ctx.test('successful start (Xcode >= 9)', (t) => {
     t.assert ||= require('node:assert')
 

test/simctl.js

@@ -180,3 +180,31 @@ test('simctl list', async (ctx) => {
     t.assert.equal(retObj.json, undefined)
   })
 })
+
+test('simctl help', async (ctx) => {
+  ctx.beforeEach((t) => {
+    spawnMock.mock.resetCalls()
+  })
+
+  await ctx.test('with no arguments', (t) => {
+    t.assert ||= require('node:assert')
+
+    spawnMock.mock.mockImplementationOnce(() => {
+      return { status: 0, stdout: '' }
+    })
+
+    simctl.help()
+    t.assert.deepEqual(spawnMock.mock.calls[0].arguments[1], ['simctl', 'help'])
+  })
+
+  await ctx.test('with a subcommand', (t) => {
+    t.assert ||= require('node:assert')
+
+    spawnMock.mock.mockImplementationOnce(() => {
+      return { status: 0, stdout: '' }
+    })
+
+    simctl.help('launch')
+    t.assert.deepEqual(spawnMock.mock.calls[0].arguments[1], ['simctl', 'help', 'launch'])
+  })
+})