Vendor things

third-party/vendor/serde_json/tests/map.rs

@@ -0,0 +1,46 @@
+use serde_json::{from_str, Map, Value};
+
+#[test]
+fn test_preserve_order() {
+    // Sorted order
+    #[cfg(not(feature = "preserve_order"))]
+    const EXPECTED: &[&str] = &["a", "b", "c"];
+
+    // Insertion order
+    #[cfg(feature = "preserve_order")]
+    const EXPECTED: &[&str] = &["b", "a", "c"];
+
+    let v: Value = from_str(r#"{"b":null,"a":null,"c":null}"#).unwrap();
+    let keys: Vec<_> = v.as_object().unwrap().keys().collect();
+    assert_eq!(keys, EXPECTED);
+}
+
+#[test]
+fn test_append() {
+    // Sorted order
+    #[cfg(not(feature = "preserve_order"))]
+    const EXPECTED: &[&str] = &["a", "b", "c"];
+
+    // Insertion order
+    #[cfg(feature = "preserve_order")]
+    const EXPECTED: &[&str] = &["b", "a", "c"];
+
+    let mut v: Value = from_str(r#"{"b":null,"a":null,"c":null}"#).unwrap();
+    let val = v.as_object_mut().unwrap();
+    let mut m = Map::new();
+    m.append(val);
+    let keys: Vec<_> = m.keys().collect();
+
+    assert_eq!(keys, EXPECTED);
+    assert!(val.is_empty());
+}
+
+#[test]
+fn test_retain() {
+    let mut v: Value = from_str(r#"{"b":null,"a":null,"c":null}"#).unwrap();
+    let val = v.as_object_mut().unwrap();
+    val.retain(|k, _| k.as_str() != "b");
+
+    let keys: Vec<_> = val.keys().collect();
+    assert_eq!(keys, &["a", "c"]);
+}