[WIP] Add test with appengine context

[akm]

Adding an example of test with appengine context.

Prerequisite

• Click Download and install the original App Engine SDK for Go and Select one from App Engine SDK for Go
  • In order to use goapp

Steps

1. git clone -b add_test_with_appengine git@github.com:akm/examples.git
2. goagen bootstrap -d github.com/goadesign/examples/appengine/design
3. glide install
4. goapp test github.com/goadesign/examples/appengine/controller

[akm]

Now I got an error

$ goapp test github.com/goadesign/examples/appengine/controller
2018/08/27 18:06:24 appengine: not running under devappserver2; using some default configuration
INFO     2018-08-27 09:06:25,042 devappserver2.py:178] Skipping SDK update check.
WARNING  2018-08-27 09:06:25,042 devappserver2.py:194] DEFAULT_VERSION_HOSTNAME will not be set correctly with --port=0
WARNING  2018-08-27 09:06:25,128 simple_search_stub.py:1196] Could not read search indexes from /var/folders/70/5yxt0jys7ss_m71y5pz_l_qc0000gn/T/appengine.testapp.user1/search_indexes
INFO     2018-08-27 09:06:25,130 api_server.py:275] Starting API server at: http://localhost:52013
INFO     2018-08-27 09:06:25,136 dispatcher.py:270] Starting module "default" running at: http://localhost:52014
INFO     2018-08-27 09:06:25,138 admin_server.py:152] Starting admin server at: http://localhost:52015
2018/08/27 18:06:25 appengine: NewContext passed an unknown http.Request
INFO     2018-08-27 09:06:26,143 stub_util.py:357] Applying all pending transactions and saving the datastore
INFO     2018-08-27 09:06:26,144 stub_util.py:360] Saving search indexes
--- FAIL: TestCreateUser (2.56s)
panic: appengine: NewContext passed an unknown http.Request [recovered]
	panic: appengine: NewContext passed an unknown http.Request

goroutine 5 [running]:
testing.tRunner.func1(0xc4201b60f0)
	/Users/user1/go_appengine_sdk_darwin_amd64-1.9.67/goroot-1.9/src/testing/testing.go:711 +0x2d2
panic(0x1424b40, 0xc4202060d0)
	/Users/user1/go_appengine_sdk_darwin_amd64-1.9.67/goroot-1.9/src/runtime/panic.go:491 +0x283
log.Panic(0xc420046b98, 0x1, 0x1)
	/Users/user1/go_appengine_sdk_darwin_amd64-1.9.67/goroot-1.9/src/log/log.go:326 +0xc0
appengine_internal.NewContext(0xc4201fc200, 0x1b20046c68, 0x0)
	/Users/user1/go_appengine_sdk_darwin_amd64-1.9.67/goroot-1.9/src/appengine_internal/api_go18.go:26 +0xfa
appengine.NewContext(0xc4201fc200, 0x6000111984e, 0x20)
	/Users/user1/go_appengine_sdk_darwin_amd64-1.9.67/goroot-1.9/src/appengine/appengine.go:55 +0x2b
github.com/goadesign/examples/appengine/vendor/google.golang.org/appengine/internal.WithContext(0x1945030, 0xc420018100, 0xc4201fc200, 0x1534c00, 0x1945030)
	/Users/user1/golang.workspace/src/github.com/goadesign/examples/appengine/vendor/google.golang.org/appengine/internal/api_classic.go:57 +0x2b
github.com/goadesign/examples/appengine/vendor/google.golang.org/appengine.WithContext(0x1945030, 0xc420018100, 0xc4201fc200, 0x1945030, 0xc420018100)
	/Users/user1/golang.workspace/src/github.com/goadesign/examples/appengine/vendor/google.golang.org/appengine/appengine.go:73 +0x3f
github.com/goadesign/examples/appengine/vendor/google.golang.org/appengine.NewContext(0xc4201fc200, 0x14d5e60, 0xc420200100)
	/Users/user1/golang.workspace/src/github.com/goadesign/examples/appengine/vendor/google.golang.org/appengine/appengine.go:66 +0x67
github.com/goadesign/examples/appengine/controller.(*HelloController).Show(0xc420208020, 0xc420200100, 0xc4201fc200, 0xc42020e000)
	/Users/user1/golang.workspace/src/github.com/goadesign/examples/appengine/controller/hello.go:26 +0x36
github.com/goadesign/examples/appengine/app/test.ShowHelloOK(0x1743460, 0xc4201b60f0, 0x1747660, 0xc4201fa090, 0xc42020e000, 0x17426a0, 0xc420208020, 0xc4201fc100, 0x0, 0x0)
	/Users/user1/golang.workspace/src/github.com/goadesign/examples/appengine/app/test/hello_testing.go:142 +0x67e
github.com/goadesign/examples/appengine/controller.TestCreateUser(0xc4201b60f0)
	/Users/user1/golang.workspace/src/github.com/goadesign/examples/appengine/controller/hello_test.go:32 +0x2e3
testing.tRunner(0xc4201b60f0, 0x1500030)
	/Users/user1/go_appengine_sdk_darwin_amd64-1.9.67/goroot-1.9/src/testing/testing.go:746 +0xd0
created by testing.(*T).Run
	/Users/user1/go_appengine_sdk_darwin_amd64-1.9.67/goroot-1.9/src/testing/testing.go:789 +0x2de
FAIL	github.com/goadesign/examples/appengine/controller	2.579s

[akm]

I'll create another pull request after this problem is solved.