decode: Don't bail on type errors

1 files changed, 47 insertions, 0 deletions

diff --git a/decode_test.go b/decode_test.go
index 456f363..c224f3a 100644
--- a/decode_test.go
+++ b/decode_test.go
@@ -48,3 +48,50 @@ func TestDecodeGrowing(t *testing.T) {
 	assert.NoError(t, dec.Decode(&x))
 	assert.ErrorIs(t, dec.Decode(&x), io.EOF)
 }
+
+type testAry []int
+
+func (a *testAry) DecodeJSON(r io.RuneScanner) error {
+	return DecodeArray(r, func(r io.RuneScanner) error {
+		var x int
+		if err := NewDecoder(r).Decode(&x); err != nil {
+			return err
+		}
+		*a = append(*a, x)
+		return nil
+	})
+}
+
+type testObj map[string]int
+
+func (o *testObj) DecodeJSON(r io.RuneScanner) error {
+	*o = make(testObj)
+	var key string
+	return DecodeObject(r,
+		func(r io.RuneScanner) error {
+			return NewDecoder(r).Decode(&key)
+		},
+		func(r io.RuneScanner) error {
+			var val int
+			if err := NewDecoder(r).Decode(&val); err != nil {
+				return err
+			}
+			(*o)[key] = val
+			return nil
+		},
+	)
+}
+
+func TestDecodeTypeError(t *testing.T) {
+	t.Parallel()
+	type outType struct {
+		First  int
+		Second testAry
+		Third  testObj
+	}
+	var out outType
+	err := NewDecoder(strings.NewReader(`{"First": 1.2, "Second": [3], "Third": {"a":4}}`)).Decode(&out)
+	assert.EqualError(t, err,
+		`json: v["First"]: cannot decode JSON number 1.2 at input byte 9 into Go int: strconv.ParseInt: parsing "1.2": invalid syntax`)
+	assert.Equal(t, outType{First: 0, Second: testAry{3}, Third: testObj{"a": 4}}, out)
+}