test(nim): validate nimpretty

.github/workflows/validate.yml

@@ -51,6 +51,8 @@ jobs:
       - uses: actions/setup-node@v4
         with:
           node-version: ${{ matrix.node }}
+      # Used by nimpretty
+      - uses: jiro4989/setup-nim-action@v1
 
       - run: rustup toolchain install stable --profile minimal
       - run: rustup component add rustfmt clippy

src/formatters/nimpretty.rs

@@ -11,3 +11,30 @@ pub fn format_using_nimpretty(file_path: &std::path::Path) -> std::io::Result<Op
 
     Ok(None)
 }
+
+#[cfg(test)]
+mod test_nimpretty {
+    use crate::{
+        formatters::{nimpretty::format_using_nimpretty, setup_snippet},
+        languages::Language,
+    };
+
+    #[test]
+    fn it_should_format_toml() {
+        let input = "proc           add( a         :int , b:int )        : int =
+  return a +          b  ";
+
+        let expected_output = "proc add(a: int, b: int): int =
+  return a + b
+";
+
+        let snippet =
+            setup_snippet(input, Language::Nim.to_file_ext()).expect("it to create a snippet file");
+
+        let output = format_using_nimpretty(snippet.path())
+            .expect("it to be succesful")
+            .expect("it to be some");
+
+        assert_eq!(expected_output, output);
+    }
+}