chore: backwards compatible warnings for test commands rename

Author: yyx990803

packages/@vue/cli-plugin-e2e-cypress/index.js

@@ -56,6 +56,13 @@ module.exports = (api, options) => {
 
     return runner
   })
+
+  // TODO remove in RC
+  api.registerCommand('e2e', (args, rawArgv) => {
+    const { warn } = require('@vue/cli-shared-utils')
+    warn(`Deprecation Warning: "vue-cli-service e2e" has been renamed to "vue-cli-service test:e2e".`)
+    return api.service.run('test:e2e', args, rawArgv)
+  })
 }
 
 module.exports.defaultModes = {

packages/@vue/cli-plugin-e2e-nightwatch/index.js

@@ -67,6 +67,13 @@ module.exports = (api, options) => {
       return runner
     })
   })
+
+  // TODO remove in RC
+  api.registerCommand('e2e', (args, rawArgv) => {
+    const { warn } = require('@vue/cli-shared-utils')
+    warn(`Deprecation Warning: "vue-cli-service e2e" has been renamed to "vue-cli-service test:e2e".`)
+    return api.service.run('test:e2e', args, rawArgv)
+  })
 }
 
 module.exports.defaultModes = {

packages/@vue/cli-plugin-unit-jest/index.js

@@ -31,6 +31,13 @@ module.exports = api => {
       })
     })
   })
+
+  // TODO remove in RC
+  api.registerCommand('test', (args, rawArgv) => {
+    const { warn } = require('@vue/cli-shared-utils')
+    warn(`Deprecation Warning: "vue-cli-service test" has been renamed to "vue-cli-service test:unit".`)
+    return api.service.run('test:unit', args, rawArgv)
+  })
 }
 
 module.exports.defaultModes = {

packages/@vue/cli-plugin-unit-mocha/index.js

@@ -72,6 +72,13 @@ module.exports = api => {
       })
     })
   })
+
+  // TODO remove in RC
+  api.registerCommand('test', (args, rawArgv) => {
+    const { warn } = require('@vue/cli-shared-utils')
+    warn(`Deprecation Warning: "vue-cli-service test" has been renamed to "vue-cli-service test:unit".`)
+    return api.service.run('test:unit', args, rawArgv)
+  })
 }
 
 module.exports.defaultModes = {