consolidate more tests

value_tests/map_test.go

@@ -1,10 +1,27 @@
 package test
 
+import "math/big"
+
 func init() {
 	marshalCases = append(marshalCases,
 		map[string]interface{}{"abc": 1},
 		map[string]MyInterface{"hello": MyString("world")},
+		map[*big.Float]string{big.NewFloat(1.2): "2"},
+		map[string]interface{}{
+			"3": 3,
+			"1": 1,
+			"2": 2,
+		},
+		map[uint64]interface{}{
+			uint64(1): "a",
+			uint64(2): "a",
+			uint64(4): "a",
+		},
 	)
+	unmarshalCases = append(unmarshalCases, unmarshalCase{
+		ptr: (*map[string]string)(nil),
+		input: `{"k\"ey": "val"}`,
+	})
 }
 
 type MyInterface interface {