reorganization of _examples and add some new examples such as iris+groupcache+mysql+docker

Former-commit-id: ed635ee95de7160cde11eaabc0c1dcb0e460a620

_examples/bootstrap/main_test.go

@@ -0,0 +1,32 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/kataras/iris/v12/httptest"
+)
+
+// go test -v
+func TestApp(t *testing.T) {
+	app := newApp()
+	e := httptest.New(t, app.Application)
+
+	// test our routes
+	e.GET("/").Expect().Status(httptest.StatusOK)
+	e.GET("/follower/42").Expect().Status(httptest.StatusOK).
+		Body().Equal("from /follower/{id:int64} with ID: 42")
+	e.GET("/following/52").Expect().Status(httptest.StatusOK).
+		Body().Equal("from /following/{id:int64} with ID: 52")
+	e.GET("/like/64").Expect().Status(httptest.StatusOK).
+		Body().Equal("from /like/{id:int64} with ID: 64")
+
+	// test not found
+	e.GET("/notfound").Expect().Status(httptest.StatusNotFound)
+	expectedErr := map[string]interface{}{
+		"app":     app.AppName,
+		"status":  httptest.StatusNotFound,
+		"message": "",
+	}
+	e.GET("/anotfoundwithjson").WithQuery("json", nil).
+		Expect().Status(httptest.StatusNotFound).JSON().Equal(expectedErr)
+}