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int8_test.go
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int8_test.go
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package null
import (
"encoding/json"
"math"
"strconv"
"testing"
)
var (
int8JSON = []byte(`126`)
)
func TestInt8From(t *testing.T) {
i := Int8From(126)
assertInt8(t, i, "Int8From()")
zero := Int8From(0)
if !zero.Valid {
t.Error("Int8From(0)", "is invalid, but should be valid")
}
}
func TestInt8FromPtr(t *testing.T) {
n := int8(126)
iptr := &n
i := Int8FromPtr(iptr)
assertInt8(t, i, "Int8FromPtr()")
null := Int8FromPtr(nil)
assertNullInt8(t, null, "Int8FromPtr(nil)")
}
func TestUnmarshalInt8(t *testing.T) {
var i Int8
err := json.Unmarshal(int8JSON, &i)
maybePanic(err)
assertInt8(t, i, "int8 json")
var null Int8
err = json.Unmarshal(nullJSON, &null)
maybePanic(err)
assertNullInt8(t, null, "null json")
var badType Int8
err = json.Unmarshal(boolJSON, &badType)
if err == nil {
panic("err should not be nil")
}
assertNullInt8(t, badType, "wrong type json")
var invalid Int8
err = invalid.UnmarshalJSON(invalidJSON)
if _, ok := err.(*json.SyntaxError); !ok {
t.Errorf("expected json.SyntaxError, not %T", err)
}
assertNullInt8(t, invalid, "invalid json")
}
func TestUnmarshalNonIntegerNumber8(t *testing.T) {
var i Int8
err := json.Unmarshal(float64JSON, &i)
if err == nil {
panic("err should be present; non-integer number coerced to int8")
}
}
func TestUnmarshalInt8Overflow(t *testing.T) {
int8Overflow := uint8(math.MaxInt8)
// Max int8 should decode successfully
var i Int8
err := json.Unmarshal([]byte(strconv.FormatUint(uint64(int8Overflow), 10)), &i)
maybePanic(err)
// Attempt to overflow
int8Overflow++
err = json.Unmarshal([]byte(strconv.FormatUint(uint64(int8Overflow), 10)), &i)
if err == nil {
panic("err should be present; decoded value overflows int8")
}
}
func TestTextUnmarshalInt8(t *testing.T) {
var i Int8
err := i.UnmarshalText([]byte("126"))
maybePanic(err)
assertInt8(t, i, "UnmarshalText() int8")
var blank Int8
err = blank.UnmarshalText([]byte(""))
maybePanic(err)
assertNullInt8(t, blank, "UnmarshalText() empty int8")
}
func TestMarshalInt8(t *testing.T) {
i := Int8From(126)
data, err := json.Marshal(i)
maybePanic(err)
assertJSONEquals(t, data, "126", "non-empty json marshal")
// invalid values should be encoded as null
null := NewInt8(0, false)
data, err = json.Marshal(null)
maybePanic(err)
assertJSONEquals(t, data, "null", "null json marshal")
}
func TestMarshalInt8Text(t *testing.T) {
i := Int8From(126)
data, err := i.MarshalText()
maybePanic(err)
assertJSONEquals(t, data, "126", "non-empty text marshal")
// invalid values should be encoded as null
null := NewInt8(0, false)
data, err = null.MarshalText()
maybePanic(err)
assertJSONEquals(t, data, "", "null text marshal")
}
func TestInt8Pointer(t *testing.T) {
i := Int8From(126)
ptr := i.Ptr()
if *ptr != 126 {
t.Errorf("bad %s int8: %#v ≠ %d\n", "pointer", ptr, 126)
}
null := NewInt8(0, false)
ptr = null.Ptr()
if ptr != nil {
t.Errorf("bad %s int8: %#v ≠ %s\n", "nil pointer", ptr, "nil")
}
}
func TestInt8IsZero(t *testing.T) {
i := Int8From(126)
if i.IsZero() {
t.Errorf("IsZero() should be false")
}
null := NewInt8(0, false)
if !null.IsZero() {
t.Errorf("IsZero() should be true")
}
zero := NewInt8(0, true)
if zero.IsZero() {
t.Errorf("IsZero() should be false")
}
}
func TestInt8SetValid(t *testing.T) {
change := NewInt8(0, false)
assertNullInt8(t, change, "SetValid()")
change.SetValid(126)
assertInt8(t, change, "SetValid()")
}
func TestInt8Scan(t *testing.T) {
var i Int8
err := i.Scan(126)
maybePanic(err)
assertInt8(t, i, "scanned int8")
var null Int8
err = null.Scan(nil)
maybePanic(err)
assertNullInt8(t, null, "scanned null")
}
func assertInt8(t *testing.T, i Int8, from string) {
if i.Int8 != 126 {
t.Errorf("bad %s int8: %d ≠ %d\n", from, i.Int8, 126)
}
if !i.Valid {
t.Error(from, "is invalid, but should be valid")
}
}
func assertNullInt8(t *testing.T, i Int8, from string) {
if i.Valid {
t.Error(from, "is valid, but should be invalid")
}
}