tests for new post notifications and dashboard stats

tests/api/admin_dashboard.rs

@@ -1,5 +1,7 @@
-use crate::helpers::{TestApp, assert_is_redirect_to};
+use crate::helpers::{TestApp, assert_is_redirect_to, fake_post_body, when_sending_an_email};
+use scraper::{Html, Selector};
 use sqlx::PgPool;
+use wiremock::ResponseTemplate;
 
 #[sqlx::test]
 async fn you_must_be_logged_in_to_access_the_admin_dashboard(connection_pool: PgPool) {
@@ -54,3 +56,68 @@ async fn subscribers_are_visible_on_the_dashboard(connection_pool: PgPool) {
     assert!(response.contains("No data available"));
     assert!(!response.contains(&subscriber.email));
 }
+
+#[sqlx::test]
+async fn dashboard_shows_correct_stats(connection_pool: PgPool) {
+    let app = TestApp::spawn(connection_pool).await;
+    app.admin_login().await;
+
+    app.create_confirmed_subscriber().await;
+    app.create_confirmed_subscriber().await;
+    app.create_unconfirmed_subscriber().await;
+    app.post_create_post(&fake_post_body()).await;
+    app.create_confirmed_subscriber().await;
+
+    when_sending_an_email()
+        .respond_with(ResponseTemplate::new(200))
+        .mount(&app.email_server)
+        .await;
+
+    app.dispatch_all_pending_emails().await;
+
+    let html = app.get_admin_dashboard_html().await;
+    let document = Html::parse_document(&html);
+
+    assert_element_is(&document, "p#subscribers-count", "3");
+    assert_element_is(&document, "p#posts-count", "1");
+    assert_element_is(&document, "p#notifications-sent", "2");
+    assert_element_is(&document, "p#open-rate", "0.0%");
+
+    let email_request = app
+        .email_server
+        .received_requests()
+        .await
+        .unwrap()
+        .pop()
+        .unwrap();
+    let links = app.get_post_urls(&email_request);
+    reqwest::get(links.html).await.unwrap();
+
+    let html = app.get_admin_dashboard_html().await;
+    let document = Html::parse_document(&html);
+    assert_element_is(&document, "p#open-rate", "50.0%");
+
+    app.post_create_post(&fake_post_body()).await;
+    app.dispatch_all_pending_emails().await;
+    let email_request = app
+        .email_server
+        .received_requests()
+        .await
+        .unwrap()
+        .pop()
+        .unwrap();
+    let links = app.get_post_urls(&email_request);
+    reqwest::get(links.html).await.unwrap();
+
+    let html = app.get_admin_dashboard_html().await;
+    let document = Html::parse_document(&html);
+    assert_element_is(&document, "p#posts-count", "2");
+    assert_element_is(&document, "p#notifications-sent", "5");
+    assert_element_is(&document, "p#open-rate", "40.0%");
+}
+
+fn assert_element_is(document: &Html, selectors: &str, value: &str) {
+    let selector = Selector::parse(selectors).unwrap();
+    let mut element = document.select(&selector);
+    assert_eq!(element.next().unwrap().text().collect::<String>(), value);
+}