Add test for folder of scripts being mutated

rojo-test/serve-test-snapshots/serve_test__empty-2.snap

@@ -2,8 +2,6 @@
 source: rojo-test/src/serve_test.rs
 expression: read_result
 ---
-sessionId: id-1
-messageCursor: 0
 instances:
   id-2:
     Id: id-2
@@ -14,3 +12,5 @@ instances:
     Children: []
     Metadata:
       ignoreUnknownInstances: true
+messageCursor: 0
+sessionId: id-1

rojo-test/serve-test-snapshots/serve_test__empty.snap

@@ -2,8 +2,8 @@
 source: rojo-test/src/serve_test.rs
 expression: info
 ---
-sessionId: id-1
-serverVersion: 0.6.0-dev
-protocolVersion: 3
 expectedPlaceIds: ~
+protocolVersion: 3
 rootInstanceId: id-2
+serverVersion: 0.6.0-dev
+sessionId: id-1

rojo-test/serve-test-snapshots/serve_test__just_txt-2.snap

@@ -2,8 +2,6 @@
 source: rojo-test/src/serve_test.rs
 expression: read_result
 ---
-sessionId: id-1
-messageCursor: 0
 instances:
   id-2:
     Id: id-2
@@ -17,3 +15,5 @@ instances:
     Children: []
     Metadata:
       ignoreUnknownInstances: false
+messageCursor: 0
+sessionId: id-1

rojo-test/serve-test-snapshots/serve_test__just_txt.snap

@@ -2,8 +2,8 @@
 source: rojo-test/src/serve_test.rs
 expression: info
 ---
-sessionId: id-1
-serverVersion: 0.6.0-dev
-protocolVersion: 3
 expectedPlaceIds: ~
+protocolVersion: 3
 rootInstanceId: id-2
+serverVersion: 0.6.0-dev
+sessionId: id-1

rojo-test/serve-test-snapshots/serve_test__scripts-2.snap

@@ -0,0 +1,42 @@
+---
+source: rojo-test/src/serve_test.rs
+expression: read_result
+---
+instances:
+  id-2:
+    Id: id-2
+    Parent: ~
+    Name: scripts
+    ClassName: Folder
+    Properties: {}
+    Children:
+      - id-3
+      - id-4
+    Metadata:
+      ignoreUnknownInstances: false
+  id-3:
+    Id: id-3
+    Parent: id-2
+    Name: bar
+    ClassName: Script
+    Properties:
+      Source:
+        Type: String
+        Value: "-- Hello, from bar!"
+    Children: []
+    Metadata:
+      ignoreUnknownInstances: false
+  id-4:
+    Id: id-4
+    Parent: id-2
+    Name: foo
+    ClassName: ModuleScript
+    Properties:
+      Source:
+        Type: String
+        Value: "-- Hello, from foo!"
+    Children: []
+    Metadata:
+      ignoreUnknownInstances: false
+messageCursor: 0
+sessionId: id-1

rojo-test/serve-test-snapshots/serve_test__scripts-3.snap

@@ -0,0 +1,18 @@
+---
+source: rojo-test/src/serve_test.rs
+expression: subscribe_result
+---
+messageCursor: 1
+messages:
+  - removedInstances: []
+    addedInstances: {}
+    updatedInstances:
+      - id: id-4
+        changedName: ~
+        changedClassName: ~
+        changedProperties:
+          Source:
+            Type: String
+            Value: Updated foo!
+        changedMetadata: ~
+sessionId: id-1

rojo-test/serve-test-snapshots/serve_test__scripts-4.snap

@@ -0,0 +1,42 @@
+---
+source: rojo-test/src/serve_test.rs
+expression: read_result
+---
+instances:
+  id-2:
+    Id: id-2
+    Parent: ~
+    Name: scripts
+    ClassName: Folder
+    Properties: {}
+    Children:
+      - id-3
+      - id-4
+    Metadata:
+      ignoreUnknownInstances: false
+  id-3:
+    Id: id-3
+    Parent: id-2
+    Name: bar
+    ClassName: Script
+    Properties:
+      Source:
+        Type: String
+        Value: "-- Hello, from bar!"
+    Children: []
+    Metadata:
+      ignoreUnknownInstances: false
+  id-4:
+    Id: id-4
+    Parent: id-2
+    Name: foo
+    ClassName: ModuleScript
+    Properties:
+      Source:
+        Type: String
+        Value: Updated foo!
+    Children: []
+    Metadata:
+      ignoreUnknownInstances: false
+messageCursor: 1
+sessionId: id-1

rojo-test/serve-test-snapshots/serve_test__scripts.snap

@@ -0,0 +1,9 @@
+---
+source: rojo-test/src/serve_test.rs
+expression: info
+---
+expectedPlaceIds: ~
+protocolVersion: 3
+rootInstanceId: id-2
+serverVersion: 0.6.0-dev
+sessionId: id-1