Handler to send emails to confirmed subscribers

tests/api/newsletters.rs

@@ -0,0 +1,111 @@
+use crate::helpers::{ConfirmationLinks, TestApp};
+use wiremock::{
+    Mock, ResponseTemplate,
+    matchers::{any, method, path},
+};
+
+#[tokio::test]
+async fn newsletters_are_not_delivered_to_unconfirmed_subscribers() {
+    let app = TestApp::spawn().await;
+    create_unconfirmed_subscriber(&app).await;
+
+    Mock::given(any())
+        .respond_with(ResponseTemplate::new(200))
+        .expect(0)
+        .mount(&app.email_server)
+        .await;
+
+    let newsletter_request_body = serde_json::json!({"title": "Newsletter title", "content": { "text": "Newsletter body as plain text", "html": "<p>Newsletter body as HTML</p>"}});
+    let response = app.post_newsletters(newsletter_request_body).await;
+
+    assert_eq!(response.status().as_u16(), 200);
+}
+
+#[tokio::test]
+async fn newsletters_are_delivered_to_confirmed_subscribers() {
+    let app = TestApp::spawn().await;
+    create_confirmed_subscriber(&app).await;
+
+    Mock::given(any())
+        .respond_with(ResponseTemplate::new(200))
+        .expect(1)
+        .mount(&app.email_server)
+        .await;
+
+    let newsletter_request_body = serde_json::json!({
+        "title": "Newsletter title",
+        "content": {
+            "text": "Newsletter body as plain text",
+            "html": "<p>Newsletter body as HTML</p>"
+        }
+    });
+    let response = app.post_newsletters(newsletter_request_body).await;
+
+    assert_eq!(response.status().as_u16(), 200);
+}
+
+#[tokio::test]
+async fn newsletters_returns_422_for_invalid_data() {
+    let app = TestApp::spawn().await;
+
+    let test_cases = [
+        (
+            serde_json::json!({
+                "content": {
+                    "text": "Newsletter body as plain text",
+                    "html": "<p>Newsletter body as HTML</p>"
+                }
+            }),
+            "missing the title",
+        ),
+        (
+            serde_json::json!({ "title": "Newsletter" }),
+            "missing the title",
+        ),
+    ];
+
+    for (invalid_body, error_message) in test_cases {
+        let response = app.post_newsletters(invalid_body).await;
+
+        assert_eq!(
+            response.status().as_u16(),
+            422,
+            "The API did not fail with 422 Unprocessable Entity when the payload was {}.",
+            error_message
+        );
+    }
+}
+
+async fn create_unconfirmed_subscriber(app: &TestApp) -> ConfirmationLinks {
+    let body = "name=Alphonse&email=alphonse.paix%40outlook.com";
+
+    let _mock_guard = Mock::given(path("/v1/email"))
+        .and(method("POST"))
+        .respond_with(ResponseTemplate::new(200))
+        .named("Create unconfirmed subscriber")
+        .expect(1)
+        .mount_as_scoped(&app.email_server)
+        .await;
+    app.post_subscriptions(body.into())
+        .await
+        .error_for_status()
+        .unwrap();
+
+    let email_request = &app
+        .email_server
+        .received_requests()
+        .await
+        .unwrap()
+        .pop()
+        .unwrap();
+    app.get_confirmation_links(email_request)
+}
+
+async fn create_confirmed_subscriber(app: &TestApp) {
+    let confirmation_links = create_unconfirmed_subscriber(app).await;
+    reqwest::get(confirmation_links.html)
+        .await
+        .unwrap()
+        .error_for_status()
+        .unwrap();
+}