unit tests for checkPeer option

test/index.test.js

@@ -6,6 +6,7 @@ const chai = require('chai')
 const chaiAsPromised = require('chai-as-promised')
 const chaiString = require('chai-string')
 const ncu = require('../lib/')
+const { npm: spawnNpm } = require('../lib/package-managers/npm')
 
 chai.use(chaiAsPromised)
 chai.use(chaiString)
@@ -708,4 +709,25 @@ describe('run', function () {
 
   })
 
+  describe('peer dependencies', () => {
+    const peerPath = path.join(__dirname, '/peer/')
+
+    it('peer dependencies of installed packages are ignored by default', async () => {
+      await spawnNpm('install', {}, { cwd: peerPath })
+      const upgrades = await ncu.run({ cwd: peerPath })
+      upgrades.should.deep.equal({
+        'ncu-test-return-version': '2.0.0'
+      })
+    })
+
+    it('peer dependencies of installed packages are checked when using option checkPeer', async () => {
+      await spawnNpm('install', {}, { cwd: peerPath })
+      const upgrades = await ncu.run({ cwd: peerPath, checkPeer: true })
+      upgrades.should.deep.equal({
+        'ncu-test-return-version': '1.1.0'
+      })
+    })
+
+  })
+
 })

test/peer/package.json

@@ -0,0 +1,6 @@
+{
+  "dependencies": {
+    "ncu-test-peer": "1.0.0",
+    "ncu-test-return-version": "1.0.0"
+  }
+}