Add tests for SQL array::group() function

lib/src/fnc/array.rs

@@ -53,7 +53,7 @@ pub fn flatten((arg,): (Value,)) -> Result<Value, Error> {
 
 pub fn group((arg,): (Value,)) -> Result<Value, Error> {
 	Ok(match arg {
-		Value::Array(v) => v.uniq().flatten().into(),
+		Value::Array(v) => v.flatten().uniq().into(),
 		_ => Value::None,
 	})
 }

lib/tests/function.rs

@@ -172,6 +172,33 @@ async fn function_array_flatten() -> Result<(), Error> {
 	Ok(())
 }
 
+#[tokio::test]
+async fn function_array_group() -> Result<(), Error> {
+	let sql = r#"
+		RETURN array::group([]);
+		RETURN array::group(3);
+		RETURN array::group([ [1,2,3,4], [3,4,5,6] ]);
+	"#;
+	let dbs = Datastore::new("memory").await?;
+	let ses = Session::for_kv().with_ns("test").with_db("test");
+	let res = &mut dbs.execute(&sql, &ses, None, false).await?;
+	assert_eq!(res.len(), 3);
+	//
+	let tmp = res.remove(0).result?;
+	let val = Value::parse("[]");
+	assert_eq!(tmp, val);
+	//
+	let tmp = res.remove(0).result?;
+	let val = Value::None;
+	assert_eq!(tmp, val);
+	//
+	let tmp = res.remove(0).result?;
+	let val = Value::parse("[1,2,3,4,5,6]");
+	assert_eq!(tmp, val);
+	//
+	Ok(())
+}
+
 #[tokio::test]
 async fn function_array_insert() -> Result<(), Error> {
 	let sql = r#"