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float64_test.go
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float64_test.go
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package null
import (
"encoding/json"
"testing"
)
var (
float64JSON = []byte(`1.2345`)
)
func TestFloat64From(t *testing.T) {
f := Float64From(1.2345)
assertFloat64(t, f, "Float64From()")
zero := Float64From(0)
if !zero.Valid {
t.Error("Float64From(0)", "is invalid, but should be valid")
}
}
func TestFloat64FromPtr(t *testing.T) {
n := float64(1.2345)
iptr := &n
f := Float64FromPtr(iptr)
assertFloat64(t, f, "Float64FromPtr()")
null := Float64FromPtr(nil)
assertNullFloat64(t, null, "Float64FromPtr(nil)")
}
func TestUnmarshalFloat64(t *testing.T) {
var f Float64
err := json.Unmarshal(float64JSON, &f)
maybePanic(err)
assertFloat64(t, f, "float64 json")
var null Float64
err = json.Unmarshal(nullJSON, &null)
maybePanic(err)
assertNullFloat64(t, null, "null json")
var badType Float64
err = json.Unmarshal(boolJSON, &badType)
if err == nil {
panic("err should not be nil")
}
assertNullFloat64(t, badType, "wrong type json")
var invalid Float64
err = invalid.UnmarshalJSON(invalidJSON)
if _, ok := err.(*json.SyntaxError); !ok {
t.Errorf("expected json.SyntaxError, not %T", err)
}
}
func TestTextUnmarshalFloat64(t *testing.T) {
var f Float64
err := f.UnmarshalText([]byte("1.2345"))
maybePanic(err)
assertFloat64(t, f, "UnmarshalText() float64")
var blank Float64
err = blank.UnmarshalText([]byte(""))
maybePanic(err)
assertNullFloat64(t, blank, "UnmarshalText() empty float64")
}
func TestMarshalFloat64(t *testing.T) {
f := Float64From(1.2345)
data, err := json.Marshal(f)
maybePanic(err)
assertJSONEquals(t, data, "1.2345", "non-empty json marshal")
// invalid values should be encoded as null
null := NewFloat64(0, false)
data, err = json.Marshal(null)
maybePanic(err)
assertJSONEquals(t, data, "null", "null json marshal")
}
func TestMarshalFloat64Text(t *testing.T) {
f := Float64From(1.2345)
data, err := f.MarshalText()
maybePanic(err)
assertJSONEquals(t, data, "1.2345", "non-empty text marshal")
// invalid values should be encoded as null
null := NewFloat64(0, false)
data, err = null.MarshalText()
maybePanic(err)
assertJSONEquals(t, data, "", "null text marshal")
}
func TestFloat64Pointer(t *testing.T) {
f := Float64From(1.2345)
ptr := f.Ptr()
if *ptr != 1.2345 {
t.Errorf("bad %s float64: %#v ≠ %v\n", "pointer", ptr, 1.2345)
}
null := NewFloat64(0, false)
ptr = null.Ptr()
if ptr != nil {
t.Errorf("bad %s float64: %#v ≠ %s\n", "nil pointer", ptr, "nil")
}
}
func TestFloat64IsZero(t *testing.T) {
f := Float64From(1.2345)
if f.IsZero() {
t.Errorf("IsZero() should be false")
}
null := NewFloat64(0, false)
if !null.IsZero() {
t.Errorf("IsZero() should be true")
}
zero := NewFloat64(0, true)
if zero.IsZero() {
t.Errorf("IsZero() should be false")
}
}
func TestFloat64SetValid(t *testing.T) {
change := NewFloat64(0, false)
assertNullFloat64(t, change, "SetValid()")
change.SetValid(1.2345)
assertFloat64(t, change, "SetValid()")
}
func TestFloat64Scan(t *testing.T) {
var f Float64
err := f.Scan(1.2345)
maybePanic(err)
assertFloat64(t, f, "scanned float64")
var null Float64
err = null.Scan(nil)
maybePanic(err)
assertNullFloat64(t, null, "scanned null")
}
func assertFloat64(t *testing.T, f Float64, from string) {
if f.Float64 != 1.2345 {
t.Errorf("bad %s float64: %f ≠ %f\n", from, f.Float64, 1.2345)
}
if !f.Valid {
t.Error(from, "is invalid, but should be valid")
}
}
func assertNullFloat64(t *testing.T, f Float64, from string) {
if f.Valid {
t.Error(from, "is valid, but should be invalid")
}
}