tasks: add test for ordering around a root

devenv-tasks/src/lib.rs

@@ -1321,6 +1321,51 @@ mod test {
         Ok(())
     }
 
+    // Ensure that tasks before and after a root are run in the correct order.
+    #[tokio::test]
+    async fn test_non_root_before_and_after() -> Result<(), Error> {
+        let script1 = create_basic_script("1")?;
+        let script2 = create_basic_script("2")?;
+        let script3 = create_basic_script("3")?;
+
+        let tasks = Tasks::new(
+            Config::try_from(json!({
+                "roots": ["myapp:task_2"],
+                "tasks": [
+                    {
+                        "name": "myapp:task_1",
+                        "command": script1.to_str().unwrap(),
+                        "before": [ "myapp:task_2"]
+                    },
+                    {
+                        "name": "myapp:task_2",
+                        "command": script2.to_str().unwrap()
+                    },
+                    {
+                        "name": "myapp:task_3",
+                        "after": ["myapp:task_2"],
+                        "command": script3.to_str().unwrap()
+                    },
+                ]
+            }))
+            .unwrap(),
+        )
+        .await?;
+        tasks.run().await;
+
+        let task_statuses = inspect_tasks(&tasks).await;
+        let task_statuses = task_statuses.as_slice();
+        assert_matches!(
+            task_statuses,
+            [
+                (name1, TaskStatus::Completed(TaskCompleted::Success(_, _))),
+                (name2, TaskStatus::Completed(TaskCompleted::Success(_, _))),
+                (name3, TaskStatus::Completed(TaskCompleted::Success(_, _)))
+            ] if name1 == "myapp:task_1" && name2 == "myapp:task_2" && name3 == "myapp:task_3"
+        );
+        Ok(())
+    }
+
     #[tokio::test]
     async fn test_dependency_failure() -> Result<(), Error> {
         let failing_script = create_script("#!/bin/sh\necho 'Failing task' && exit 1")?;