Implement wildcard matcher for arrays

src/matchers.rs

@@ -33,10 +33,10 @@ pub struct WildcardedChild {}
 
 impl Matcher for WildcardedChild {
     fn select<'a>(&self, node: &'a Value) -> Iter<'a> {
-        if let Some(m) = node.as_object() {
-            Box::new(m.values())
-        } else {
-            Box::new(iter::empty())
+        match node {
+            Value::Object(m) => Box::new(m.values()),
+            Value::Array(a) => Box::new(a.iter()),
+            _ => Box::new(iter::empty()),
         }
     }
 }
@@ -75,3 +75,25 @@ impl Matcher for Union {
         Box::new(self.elements.iter().flat_map(move |it| it.select(node)))
     }
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    use serde_json::{json, Value};
+
+    #[test]
+    fn object_wildcard() {
+        let s = WildcardedChild {};
+        let j = json!({"a": 1, "b": 2});
+        let r: Vec<&Value> = s.select(&j).collect();
+        assert_eq!(format!("{:?}", r), "[Number(1), Number(2)]");
+    }
+
+    #[test]
+    fn array_wildcard() {
+        let s = WildcardedChild {};
+        let j = json!([1, 2]);
+        let r: Vec<&Value> = s.select(&j).collect();
+        assert_eq!(format!("{:?}", r), "[Number(1), Number(2)]");
+    }
+}

tests/cts.json

@@ -37,7 +37,7 @@
     "name": "wildcarded child of array",
     "selector": "$.*",
     "document": ["first", "second"],
-    "result": []
+    "result": ["first", "second"]
   }, {
     "name": "wildcarded child dot child",
     "selector": "$.*.a",