Add unit tests for version info gathering

packages/web-runtime/tests/unit/container/versions.spec.ts

@@ -0,0 +1,52 @@
+import { getBackendVersion, getWebVersion } from '../../../src/container/versions'
+import Vuex, { Store } from 'vuex'
+import Vue from 'vue'
+
+Vue.use(Vuex)
+
+describe('collect version information', () => {
+  describe('web version', () => {
+    beforeEach(() => {
+      process.env.PACKAGE_VERSION = '4.7.0'
+    })
+    it('provides the web version with a static string without exceptions', () => {
+      expect(getWebVersion()).toBe('ownCloud Web UI 4.7.0')
+    })
+  })
+  describe('backend version', () => {
+    it('returns undefined when the backend version object is not available', () => {
+      const store = versionStore(undefined)
+      expect(getBackendVersion({ store })).toBeUndefined()
+    })
+    it('returns undefined when the backend version object has no "string" field', () => {
+      const store = versionStore({
+        product: 'ownCloud',
+        string: undefined
+      })
+      expect(getBackendVersion({ store })).toBeUndefined()
+    })
+    it('falls back to "ownCloud" as a product when none is defined', () => {
+      const store = versionStore({
+        string: '10.8.0',
+        edition: 'Community'
+      })
+      expect(getBackendVersion({ store })).toBe('ownCloud 10.8.0 Community')
+    })
+    it('provides the backend version as concatenation of product, version and edition', () => {
+      const store = versionStore({
+        product: 'oCIS',
+        string: '1.16.0',
+        edition: 'Reva'
+      })
+      expect(getBackendVersion({ store })).toBe('oCIS 1.16.0 Reva')
+    })
+  })
+})
+
+const versionStore = (version: any): Store<any> => {
+  return new Vuex.Store({
+    getters: {
+      user: jest.fn(() => ({ version }))
+    }
+  })
+}