Change JSON model naming behavior.

- JSON model names now come from the file name
- The 'Name' field is now optional for the top-level instance
- Snapshot tests run way faster by executing Rojo directly instead of Cargo

rojo-test/src/build_test.rs

@@ -27,6 +27,7 @@ gen_build_tests! {
     csv_in_folder,
     gitkeep,
     json_model_in_folder,
+    json_model_legacy_name,
     module_in_folder,
     rbxm_in_folder,
     rbxmx_in_folder,
@@ -44,11 +45,16 @@ fn run_build_test(test_name: &str) {
     let input_path = build_test_path.join(test_name);
     let output_path = output_dir.path().join(format!("{}.rbxmx", test_name));
 
-    let status = Command::new("cargo")
+    let mut exe_path = working_dir.join("target/debug/rojo");
+    if cfg!(windows) {
+        exe_path.set_extension("exe");
+    }
+
+    let status = Command::new(exe_path)
         .args(&[
-            "run", "--quiet", "--",
             "build", input_path.to_str().unwrap(), "-o", output_path.to_str().unwrap(),
         ])
+        .env("RUST_LOG", "error")
         .current_dir(working_dir)
         .status()
         .expect("Couldn't start Rojo");

rojo-test/src/snapshots/build_test__json_model_in_folder.snap

@@ -1,5 +1,5 @@
 ---
-created: "2019-08-15T01:02:40.318937300Z"
+created: "2019-08-15T20:40:50.467761900Z"
 creator: insta@0.10.0
 source: rojo-test/src/build_test.rs
 expression: contents
@@ -11,7 +11,7 @@ expression: contents
     </Properties>
     <Item class="IntValue" referent="1">
       <Properties>
-        <string name="Name">Top-Level Value</string>
+        <string name="Name">simple-model</string>
         <int name="Value">5</int>
       </Properties>
       <Item class="Folder" referent="2">

rojo-test/src/snapshots/build_test__json_model_legacy_name.snap

@@ -0,0 +1,18 @@
+---
+created: "2019-08-15T20:41:28.743618200Z"
+creator: insta@0.10.0
+source: rojo-test/src/build_test.rs
+expression: contents
+---
+<roblox version="4">
+  <Item class="Folder" referent="0">
+    <Properties>
+      <string name="Name">json_model_legacy_name</string>
+    </Properties>
+    <Item class="Folder" referent="1">
+      <Properties>
+        <string name="Name">Expected Name</string>
+      </Properties>
+    </Item>
+  </Item>
+</roblox>