vendor/serde_json/tests/map.rs

   1 use serde_json::{from_str, Map, Value};
   2
   3 #[test]
   4 fn test_preserve_order() {
   5     // Sorted order
   6     #[cfg(not(feature = "preserve_order"))]
   7     const EXPECTED: &[&str] = &["a", "b", "c"];
   8
   9     // Insertion order
  10     #[cfg(feature = "preserve_order")]
  11     const EXPECTED: &[&str] = &["b", "a", "c"];
  12
  13     let v: Value = from_str(r#"{"b":null,"a":null,"c":null}"#).unwrap();
  14     let keys: Vec<_> = v.as_object().unwrap().keys().collect();
  15     assert_eq!(keys, EXPECTED);
  16 }
  17
  18 #[test]
  19 fn test_append() {
  20     // Sorted order
  21     #[cfg(not(feature = "preserve_order"))]
  22     const EXPECTED: &[&str] = &["a", "b", "c"];
  23
  24     // Insertion order
  25     #[cfg(feature = "preserve_order")]
  26     const EXPECTED: &[&str] = &["b", "a", "c"];
  27
  28     let mut v: Value = from_str(r#"{"b":null,"a":null,"c":null}"#).unwrap();
  29     let val = v.as_object_mut().unwrap();
  30     let mut m = Map::new();
  31     m.append(val);
  32     let keys: Vec<_> = m.keys().collect();
  33
  34     assert_eq!(keys, EXPECTED);
  35     assert!(val.is_empty());
  36 }
  37
  38 #[cfg(not(no_btreemap_retain))]
  39 #[test]
  40 fn test_retain() {
  41     let mut v: Value = from_str(r#"{"b":null,"a":null,"c":null}"#).unwrap();
  42     let val = v.as_object_mut().unwrap();
  43     val.retain(|k, _| k.as_str() != "b");
  44
  45     let keys: Vec<_> = val.keys().collect();
  46     assert_eq!(keys, &["a", "c"]);
  47 }