Risky: Move tests into mod.rs

Usual Rust practice is to put tests in the same file they are testing.
I don't see any magic in the texttests that would require tests and code
to be in separate files, but I am not entirely sure, so I added the
risky tag.

rust/src/gildedrose/mod.rs

@@ -78,4 +78,15 @@ impl GildedRose {
 }
 
 #[cfg(test)]
-mod test;
+mod tests {
+    use super::{GildedRose, Item};
+
+    #[test]
+    pub fn foo() {
+        let items = vec![Item::new(String::from("foo"), 0, 0)];
+        let mut rose = GildedRose::new(items);
+        rose.update_quality();
+
+        assert_eq!("fixme", rose.items[0].name);
+    }
+}

rust/src/gildedrose/test.rs

@@ -1,10 +0,0 @@
-use super::{GildedRose, Item};
-
-#[test]
-pub fn foo() {
-    let items = vec![Item::new(String::from("foo"), 0, 0)];
-    let mut rose = GildedRose::new(items);
-    rose.update_quality();
-
-    assert_eq!("fixme", rose.items[0].name);
-}