1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
use std::{
env::args,
io::{stdin, stdout, IsTerminal},
sync::Mutex,
};
use actix_web::{
get, http::header::ContentType, post, web, App, HttpResponse, HttpServer, Responder,
};
use serde::{Deserialize, Serialize};
#[derive(Debug, PartialEq, Serialize, Deserialize, Clone)]
struct Registration {
url: String,
}
trait AppState {
fn register(&mut self, registration: &Registration) -> RegistrationResult;
}
#[derive(Debug, PartialEq, Serialize, Deserialize, Clone)]
enum RegistrationResult {
RegistrationSuccess { id: String, url: String },
UrlAlreadyRegistered { url: String },
}
#[derive(Debug, PartialEq, Serialize, Deserialize, Clone)]
enum RegistrationFailure {
UrlAlreadyRegistered { url: String },
}
#[post("/register")]
async fn register(
app_state: web::Data<Mutex<dyn AppState>>,
registration: web::Json<Registration>,
) -> impl Responder {
let result = app_state.lock().unwrap().register(®istration);
match result {
RegistrationResult::RegistrationSuccess { .. } => HttpResponse::Ok().json(result),
RegistrationResult::UrlAlreadyRegistered { .. } => HttpResponse::BadRequest().json(result),
}
}
#[actix_web::main]
async fn main() -> std::io::Result<()> {
HttpServer::new(|| App::new().service(register))
.bind(("127.0.0.1", 8080))?
.run()
.await
}
#[cfg(test)]
mod app_tests {
use std::sync::Arc;
use actix_web::{body, http::header::ContentType, middleware::Logger, test, App};
use super::*;
struct DummyAppState {
id: String,
}
impl DummyAppState {
fn new(id: String) -> Self {
Self { id }
}
}
impl AppState for DummyAppState {
fn register(&mut self, registration: &Registration) -> RegistrationResult {
if self.id == "" {
return RegistrationResult::UrlAlreadyRegistered {
url: registration.url.clone(),
};
} else {
RegistrationResult::RegistrationSuccess {
id: self.id.clone(),
url: registration.url.clone(),
}
}
}
}
#[actix_web::test]
async fn post_registration_returns_success_with_unique_id() {
let id = "0123456789abcdef0123456789abcdef".to_string();
let dummy_state: Arc<Mutex<dyn AppState>> =
Arc::new(Mutex::new(DummyAppState::new(id.clone())));
// FIXME should only be called once, move to setup
// env_logger::init();
let app = test::init_service(
App::new()
.wrap(Logger::default())
.app_data(web::Data::from(dummy_state))
.service(register),
)
.await;
let url = "http://192.168.1.1".to_string();
let req = test::TestRequest::post()
.uri("/register")
.set_json(Registration { url: url.clone() })
.insert_header(ContentType::json())
.to_request();
let resp = test::call_service(&app, req).await;
assert!(resp.status().is_success());
let body = resp.into_body();
let bytes = body::to_bytes(body).await;
assert_eq!(
RegistrationResult::RegistrationSuccess { id, url },
serde_json::from_slice(&bytes.unwrap()).unwrap()
);
}
#[actix_web::test]
async fn post_registration_fails_given_url_is_already_registered() {
let dummy_state: Arc<Mutex<dyn AppState>> =
Arc::new(Mutex::new(DummyAppState::new("".to_string())));
let app = test::init_service(
App::new()
.wrap(Logger::default())
.app_data(web::Data::from(dummy_state))
.service(register),
)
.await;
let url = "http://192.168.1.1".to_string();
let _ = test::TestRequest::post()
.uri("/register")
.set_json(Registration { url: url.clone() })
.insert_header(ContentType::json())
.to_request();
// second request with the same URL
let req = test::TestRequest::post()
.uri("/register")
.set_json(Registration { url: url.clone() })
.insert_header(ContentType::json())
.to_request();
let resp = test::call_service(&app, req).await;
assert!(resp.status().is_client_error());
let body = resp.into_body();
let bytes = body::to_bytes(body).await;
assert_eq!(
RegistrationResult::UrlAlreadyRegistered { url },
serde_json::from_slice(&bytes.unwrap()).unwrap()
);
}
#[actix_web::test]
async fn post_registration_fails_given_url_is_already_registered() {
let id = "0123456789abcdef0123456789abcdef".to_string();
let id_generator: Arc<dyn IdGenerator> = Arc::new(ConstantIdGenerator::new(id.clone()));
let app = test::init_service(
App::new()
.wrap(Logger::default())
.app_data(web::Data::from(id_generator))
.service(register),
)
.await;
let url = "http://192.168.1.1".to_string();
let _ = test::TestRequest::post()
.uri("/register")
.set_json(Registration { url: url.clone() })
.insert_header(ContentType::json())
.to_request();
// second request with the same URL
let req = test::TestRequest::post()
.uri("/register")
.set_json(Registration { url: url.clone() })
.insert_header(ContentType::json())
.to_request();
let resp = test::call_service(&app, req).await;
assert!(resp.status().is_client_error());
let body = resp.into_body();
let bytes = body::to_bytes(body).await;
assert_eq!(
RegistrationResult::Failure(RegistrationFailure::UrlAlreadyRegistered { url }),
serde_json::from_slice(&bytes.unwrap()).unwrap()
);
}
}
|
