JsonizeIgnoreExtraKeys

import std.json            : parseJSON;
import std.exception       : collectException, assertNotThrown;
import jsonizer.jsonize    : JsonizeMe;
import jsonizer.fromjson   : fromJSON;
import jsonizer.exceptions : JsonizeMismatchException;

static struct NoCares {
  mixin JsonizeMe;
  @jsonize {
    int i;
    float f;
  }
}

static struct VeryStrict {
  mixin JsonizeMe!(JsonizeIgnoreExtraKeys.no);
  @jsonize {
    int i;
    float f;
  }
}

// no extra fields, neither should throw
assertNotThrown(`{ "i": 5, "f": 0.2}`.parseJSON.fromJSON!NoCares);
assertNotThrown(`{ "i": 5, "f": 0.2}`.parseJSON.fromJSON!VeryStrict);

// extra field "s"
// `NoCares` ignores extra keys, so it will not throw
assertNotThrown(`{ "i": 5, "f": 0.2, "s": "hi"}`.parseJSON.fromJSON!NoCares);
// `VeryStrict` does not ignore extra keys
auto ex = collectException!JsonizeMismatchException(
    `{ "i": 5, "f": 0.2, "s": "hi"}`.parseJSON.fromJSON!VeryStrict);

assert(ex !is null, "extra field 's' should trigger JsonizeMismatchException");
assert(ex.targetType == typeid(VeryStrict));
assert(ex.missingKeys == [ ]);
assert(ex.extraKeys == [ "s" ]);