Make the name field in projects optional (#870)

Closes #858.

If a project is named `default.project.json`, it acts as an `init` file
and gains the name of the folder it's inside of. If it is named
something other than `default.project.json`, it gains the name of the
file with `.project.json` trimmed off. So e.g. `foo.project.json`
becomes `foo`.

tests/tests/build.rs

@@ -62,6 +62,9 @@ gen_build_tests! {
     sync_rule_alone,
     sync_rule_complex,
     sync_rule_nested_projects,
+    no_name_default_project,
+    no_name_project,
+    no_name_top_level_project,
 }
 
 fn run_build_test(test_name: &str) {
@@ -73,7 +76,7 @@ fn run_build_test(test_name: &str) {
     let output_path = output_dir.path().join(format!("{}.rbxmx", test_name));
 
     let output = Command::new(ROJO_PATH)
-        .args(&[
+        .args([
             "build",
             input_path.to_str().unwrap(),
             "-o",

tests/tests/serve.rs

@@ -306,3 +306,57 @@ fn sync_rule_no_extension() {
         );
     });
 }
+
+#[test]
+fn no_name_default_project() {
+    run_serve_test("no_name_default_project", |session, mut redactions| {
+        let info = session.get_api_rojo().unwrap();
+        let root_id = info.root_instance_id;
+
+        assert_yaml_snapshot!(
+            "no_name_default_project_info",
+            redactions.redacted_yaml(info)
+        );
+
+        let read_response = session.get_api_read(root_id).unwrap();
+        assert_yaml_snapshot!(
+            "no_name_default_project_all",
+            read_response.intern_and_redact(&mut redactions, root_id)
+        );
+    });
+}
+
+#[test]
+fn no_name_project() {
+    run_serve_test("no_name_project", |session, mut redactions| {
+        let info = session.get_api_rojo().unwrap();
+        let root_id = info.root_instance_id;
+
+        assert_yaml_snapshot!("no_name_project_info", redactions.redacted_yaml(info));
+
+        let read_response = session.get_api_read(root_id).unwrap();
+        assert_yaml_snapshot!(
+            "no_name_project_all",
+            read_response.intern_and_redact(&mut redactions, root_id)
+        );
+    });
+}
+
+#[test]
+fn no_name_top_level_project() {
+    run_serve_test("no_name_top_level_project", |session, mut redactions| {
+        let info = session.get_api_rojo().unwrap();
+        let root_id = info.root_instance_id;
+
+        assert_yaml_snapshot!(
+            "no_name_top_level_project_info",
+            redactions.redacted_yaml(info)
+        );
+
+        let read_response = session.get_api_read(root_id).unwrap();
+        assert_yaml_snapshot!(
+            "no_name_top_level_project_all",
+            read_response.intern_and_redact(&mut redactions, root_id)
+        );
+    });
+}