Add ServeSession test for project with folder

src/serve_session.rs

@@ -197,6 +197,7 @@ mod serve_session {
     use std::{path::PathBuf, time::Duration};
 
     use insta::assert_yaml_snapshot;
+    use maplit::hashmap;
     use rojo_insta_ext::RedactionMap;
     use tokio::{runtime::Runtime, timer::Timeout};
 
@@ -217,6 +218,33 @@ mod serve_session {
         assert_yaml_snapshot!(view_tree(&session.tree(), &mut rm));
     }
 
+    #[test]
+    fn project_with_folder() {
+        let mut imfs = Imfs::new(NoopFetcher);
+
+        imfs.debug_load_snapshot(
+            "/foo",
+            ImfsSnapshot::dir(hashmap! {
+                "default.project.json" => ImfsSnapshot::file(r#"
+                {
+                    "name": "HelloWorld",
+                    "tree": {
+                        "$path": "src"
+                    }
+                }
+            "#),
+                "src" => ImfsSnapshot::dir(hashmap! {
+                    "hello.txt" => ImfsSnapshot::file("Hello, world!"),
+                }),
+            }),
+        );
+
+        let session = ServeSession::new(imfs, "/foo", None);
+
+        let mut rm = RedactionMap::new();
+        assert_yaml_snapshot!(view_tree(&session.tree(), &mut rm));
+    }
+
     #[test]
     fn change_txt_file() {
         let (state, fetcher) = TestFetcher::new();

src/snapshots/serve_session__project_with_folder.snap

@@ -0,0 +1,30 @@
+---
+source: src/serve_session.rs
+expression: "view_tree(&session.tree(), &mut rm)"
+---
+id: id-1
+name: HelloWorld
+class_name: Folder
+properties: {}
+metadata:
+  ignore_unknown_instances: false
+  instigating_source:
+    Path: /foo/default.project.json
+  relevant_paths:
+    - /foo/src
+    - /foo/default.project.json
+children:
+  - id: id-2
+    name: hello
+    class_name: StringValue
+    properties:
+      Value:
+        Type: String
+        Value: "Hello, world!"
+    metadata:
+      ignore_unknown_instances: false
+      instigating_source:
+        Path: /foo/src/hello.txt
+      relevant_paths:
+        - /foo/src/hello.txt
+    children: []