test: move application tests to tests/

test_support/test_helpers -> tests/support; watched_at unified w/ domain test_watched_at (2024-03-15).
Kept inline: users::diary_filter tests (feed_sort_to_direction_all_variants, paged_user_filter_builds_correctly) - pub(super) helpers in private module.
Dropped stale never-compiled users/tests/get_users.rs (old execute signature).

crates/application/tests/integrations/get_tokens_test.rs

@@ -0,0 +1,72 @@
+use crate::support::generate_webhook_token_command;
+use std::sync::Arc;
+
+use domain::models::WatchEventSource;
+use domain::ports::WebhookTokenRepository;
+use domain::testing::InMemoryStore;
+use uuid::Uuid;
+
+use application::integrations::deps::{GenerateWebhookTokenDeps, GetWebhookTokensDeps};
+use application::integrations::{
+    commands::GenerateWebhookTokenCommand, generate_token, get_tokens,
+    queries::GetWebhookTokensQuery,
+};
+
+fn generate_deps(tokens: &Arc<dyn WebhookTokenRepository>) -> GenerateWebhookTokenDeps {
+    GenerateWebhookTokenDeps {
+        webhook_token: Arc::clone(tokens),
+    }
+}
+
+fn get_deps(tokens: &Arc<dyn WebhookTokenRepository>) -> GetWebhookTokensDeps {
+    GetWebhookTokensDeps {
+        webhook_token: Arc::clone(tokens),
+    }
+}
+
+#[tokio::test]
+async fn returns_empty_when_no_tokens() {
+    let tokens: Arc<dyn WebhookTokenRepository> = InMemoryStore::new();
+
+    let result = get_tokens::execute(
+        &get_deps(&tokens),
+        GetWebhookTokensQuery {
+            user_id: Uuid::new_v4(),
+        },
+    )
+    .await
+    .unwrap();
+
+    assert!(result.is_empty());
+}
+
+#[tokio::test]
+async fn returns_tokens_after_generate() {
+    let tokens: Arc<dyn WebhookTokenRepository> = InMemoryStore::new();
+
+    let user_id = Uuid::new_v4();
+
+    generate_token::execute(
+        &generate_deps(&tokens),
+        generate_webhook_token_command(user_id),
+    )
+    .await
+    .unwrap();
+
+    generate_token::execute(
+        &generate_deps(&tokens),
+        GenerateWebhookTokenCommand {
+            provider: WatchEventSource::Plex,
+            label: Some("living room".into()),
+            ..generate_webhook_token_command(user_id)
+        },
+    )
+    .await
+    .unwrap();
+
+    let result = get_tokens::execute(&get_deps(&tokens), GetWebhookTokensQuery { user_id })
+        .await
+        .unwrap();
+
+    assert_eq!(result.len(), 2);
+}