Change integration tests to open buffers via the project

crates/project/src/project.rs

@@ -476,9 +476,10 @@ impl Project {
 
     pub fn open_buffer(
         &mut self,
-        path: ProjectPath,
+        path: impl Into<ProjectPath>,
         cx: &mut ModelContext<Self>,
     ) -> Task<Result<ModelHandle<Buffer>>> {
+        let path = path.into();
         let worktree = if let Some(worktree) = self.worktree_for_id(path.worktree_id, cx) {
             worktree
         } else {
@@ -520,6 +521,13 @@ impl Project {
         })
     }
 
+    #[cfg(any(test, feature = "test-support"))]
+    pub fn has_open_buffer(&self, path: impl Into<ProjectPath>, cx: &AppContext) -> bool {
+        let path = path.into();
+        self.worktree_for_id(path.worktree_id, cx)
+            .map_or(false, |tree| tree.read(cx).has_open_buffer(path.path, cx))
+    }
+
     fn assign_language_to_buffer(
         &mut self,
         worktree: ModelHandle<Worktree>,
@@ -1470,6 +1478,15 @@ impl Collaborator {
     }
 }
 
+impl<P: AsRef<Path>> From<(WorktreeId, P)> for ProjectPath {
+    fn from((worktree_id, path): (WorktreeId, P)) -> Self {
+        Self {
+            worktree_id,
+            path: path.as_ref().into(),
+        }
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::{Event, *};