Add tests for query_params example.

examples/query_params/Cargo.toml

@@ -7,3 +7,6 @@ workspace = "../../"
 [dependencies]
 rocket = { path = "../../lib" }
 rocket_codegen = { path = "../../codegen" }
+
+[dev-dependencies]
+rocket = { path = "../../lib", features = ["testing"] }

examples/query_params/src/main.rs

@@ -3,6 +3,8 @@
 
 extern crate rocket;
 
+#[cfg(test)] mod tests;
+
 #[derive(FromForm)]
 struct Person<'r> {
     name: &'r str,

examples/query_params/src/tests.rs

@@ -0,0 +1,60 @@
+use super::rocket;
+use rocket::testing::MockRequest;
+use rocket::http::Method::*;
+use rocket::http::Status;
+use rocket::Response;
+
+macro_rules! run_test {
+    ($query:expr, $test_fn:expr) => ({
+        let rocket = rocket::ignite()
+            .mount("/", routes![super::hello]);
+
+        let mut request = MockRequest::new(Get, format!("/hello{}", $query));
+        $test_fn(request.dispatch_with(&rocket));
+    })
+}
+
+#[test]
+fn age_and_name_params() {
+  run_test!("?age=10&name=john", |mut response: Response| {
+    let body_str = response.body().and_then(|body| body.into_string());
+    assert_eq!(body_str, Some("Hello, 10 year old named john!".to_string()));
+  });
+}
+
+#[test]
+fn age_param_only() {
+  run_test!("?age=10", |response: Response| {
+    assert_eq!(response.status(), Status::NotFound);
+  });
+}
+
+#[test]
+fn name_param_only() {
+  run_test!("?name=John", |mut response: Response| {
+    let body_str = response.body().and_then(|body| body.into_string());
+    assert_eq!(body_str, Some("Hello John!".to_string()));
+  });
+}
+
+#[test]
+fn no_params() {
+  run_test!("", |response: Response| {
+    assert_eq!(response.status(), Status::NotFound);
+  });
+
+  run_test!("?", |response: Response| {
+    assert_eq!(response.status(), Status::NotFound);
+  });
+}
+
+#[test]
+fn non_existent_params() {
+  run_test!("?x=y", |response: Response| {
+    assert_eq!(response.status(), Status::NotFound);
+  });
+
+  run_test!("?age=10&name=john&complete=true", |response: Response| {
+    assert_eq!(response.status(), Status::NotFound);
+  });
+}