1 files changed, 55 insertions, 0 deletions
diff --git a/third_party/rust/toml/tests/formatting.rs b/third_party/rust/toml/tests/formatting.rs
new file mode 100644
index 0000000000..10fb165385
--- /dev/null
+++ b/third_party/rust/toml/tests/formatting.rs
@@ -0,0 +1,55 @@
+extern crate serde;
+#[macro_use]
+extern crate serde_derive;
+extern crate toml;
+
+use toml::to_string;
+
+#[derive(Debug, Clone, Hash, PartialEq, Eq, Serialize, Deserialize)]
+struct User {
+    pub name: String,
+    pub surname: String,
+}
+
+#[derive(Debug, Clone, Hash, PartialEq, Eq, Serialize, Deserialize)]
+struct Users {
+    pub user: Vec<User>,
+}
+
+#[derive(Debug, Clone, Hash, PartialEq, Eq, Serialize, Deserialize)]
+struct TwoUsers {
+    pub user0: User,
+    pub user1: User,
+}
+
+#[test]
+fn no_unnecessary_newlines_array() {
+    assert!(!to_string(&Users {
+            user: vec![
+                    User {
+                        name: "John".to_string(),
+                        surname: "Doe".to_string(),
+                    },
+                    User {
+                        name: "Jane".to_string(),
+                        surname: "Dough".to_string(),
+                    },
+                ],
+        }).unwrap()
+        .starts_with("\n"));
+}
+
+#[test]
+fn no_unnecessary_newlines_table() {
+    assert!(!to_string(&TwoUsers {
+            user0: User {
+                name: "John".to_string(),
+                surname: "Doe".to_string(),
+            },
+            user1: User {
+                name: "Jane".to_string(),
+                surname: "Dough".to_string(),
+            },
+        }).unwrap()
+        .starts_with("\n"));
+}