func TestPredicates(t *testing.T) {
// The list of case dates must be sorted in ascending order
cases := []struct {
year int
month time.Month
day int
}{
{-1234, time.February, 5},
{0, time.April, 12},
{1, time.January, 1},
{1946, time.February, 4},
{1970, time.January, 1},
{1976, time.April, 1},
{1999, time.December, 1},
{1111111, time.June, 21},
}
for i, ci := range cases {
di := date.New(ci.year, ci.month, ci.day)
for j, cj := range cases {
dj := date.New(cj.year, cj.month, cj.day)
p := di.Equal(dj)
q := i == j
if p != q {
t.Errorf("Equal(%v, %v) == %v, want %v", di, dj, p, q)
}
p = di.Before(dj)
q = i < j
if p != q {
t.Errorf("Before(%v, %v) == %v, want %v", di, dj, p, q)
}
p = di.After(dj)
q = i > j
if p != q {
t.Errorf("After(%v, %v) == %v, want %v", di, dj, p, q)
}
p = di == dj
q = i == j
if p != q {
t.Errorf("Equal(%v, %v) == %v, want %v", di, dj, p, q)
}
p = di != dj
q = i != j
if p != q {
t.Errorf("Equal(%v, %v) == %v, want %v", di, dj, p, q)
}
}
}
// Test IsZero
zero := date.Date{}
if !zero.IsZero() {
t.Errorf("IsZero(%v) == false, want true", zero)
}
today := date.Today()
if today.IsZero() {
t.Errorf("IsZero(%v) == true, want false", today)
}
}
func TestNew(t *testing.T) {
cases := []string{
"0000-01-01T00:00:00+00:00",
"0001-01-01T00:00:00+00:00",
"1614-01-01T01:02:03+04:00",
"1970-01-01T00:00:00+00:00",
"1815-12-10T05:06:07+00:00",
"1901-09-10T00:00:00-05:00",
"1998-09-01T00:00:00-08:00",
"2000-01-01T00:00:00+00:00",
"9999-12-31T00:00:00+00:00",
}
for _, c := range cases {
tIn, err := time.Parse(time.RFC3339, c)
if err != nil {
t.Errorf("New(%v) cannot parse input: %v", c, err)
continue
}
dOut := date.New(tIn.Year(), tIn.Month(), tIn.Day())
if !same(dOut, tIn) {
t.Errorf("New(%v) == %v, want date of %v", c, dOut, tIn)
}
dOut = date.NewAt(tIn)
if !same(dOut, tIn) {
t.Errorf("NewAt(%v) == %v, want date of %v", c, dOut, tIn)
}
}
}
func TestArithmetic(t *testing.T) {
cases := []struct {
year int
month time.Month
day int
}{
{-1234, time.February, 5},
{0, time.April, 12},
{1, time.January, 1},
{1946, time.February, 4},
{1970, time.January, 1},
{1976, time.April, 1},
{1999, time.December, 1},
{1111111, time.June, 21},
}
offsets := []int{-1000000, -9999, -555, -99, -22, -1, 0, 1, 22, 99, 555, 9999, 1000000}
for _, c := range cases {
d := date.New(c.year, c.month, c.day)
for _, days := range offsets {
d2 := d.Add(days)
days2 := d2.Sub(d)
if days2 != days {
t.Errorf("AddSub(%v,%v) == %v, want %v", d, days, days2, days)
}
d3 := d2.Add(-days)
if d3 != d {
t.Errorf("AddNeg(%v,%v) == %v, want %v", d, days, d3, d)
}
}
}
}
func ExampleDate_Format() {
// layout shows by example how the reference time should be represented.
const layout = "Jan 2, 2006"
d := date.New(2009, time.November, 10)
fmt.Println(d.Format(layout))
// Output: Nov 10, 2009
}
func ExampleDate_AddDate() {
d := date.New(1000, time.January, 1)
// Months and days do not need to be constrained to [1,12] and [1,365].
u := d.AddDate(0, 14, -1)
fmt.Println(u)
// Output: 1001-02-28
}
func ExampleDate_FormatISO() {
// According to legend, Rome was founded on April 21, 753 BC.
// Note that with astronomical year numbering, 753 BC becomes -752
// because 1 BC is actually year 0.
d := date.New(-752, time.April, 21)
fmt.Println(d.FormatISO(5))
// Output: -00752-04-21
}
func TestTextMarshalling(t *testing.T) {
var d date.Date
cases := []struct {
value date.Date
want string
}{
{date.New(-11111, time.February, 3), "-11111-02-03"},
{date.New(-1, time.December, 31), "-0001-12-31"},
{date.New(0, time.January, 1), "0000-01-01"},
{date.New(1, time.January, 1), "0001-01-01"},
{date.New(1970, time.January, 1), "1970-01-01"},
{date.New(2012, time.June, 25), "2012-06-25"},
{date.New(12345, time.June, 7), "+12345-06-07"},
}
for _, c := range cases {
bytes, err := c.value.MarshalText()
if err != nil {
t.Errorf("Text(%v) marshal error %v", c, err)
} else if string(bytes) != c.want {
t.Errorf("Text(%v) == %v, want %v", c.value, string(bytes), c.want)
} else {
err = d.UnmarshalText(bytes)
if err != nil {
t.Errorf("Text(%v) unmarshal error %v", c.value, err)
}
}
}
}
func TestGobEncoding(t *testing.T) {
var b bytes.Buffer
encoder := gob.NewEncoder(&b)
decoder := gob.NewDecoder(&b)
cases := []date.Date{
date.New(-11111, time.February, 3),
date.New(-1, time.December, 31),
date.New(0, time.January, 1),
date.New(1, time.January, 1),
date.New(1970, time.January, 1),
date.New(2012, time.June, 25),
date.New(12345, time.June, 7),
}
for _, c := range cases {
var d date.Date
err := encoder.Encode(&c)
if err != nil {
t.Errorf("Gob(%v) encode error %v", c, err)
} else {
err = decoder.Decode(&d)
if err != nil {
t.Errorf("Gob(%v) decode error %v", c, err)
}
}
}
}
func TestTime(t *testing.T) {
cases := []struct {
year int
month time.Month
day int
}{
{-1234, time.February, 5},
{0, time.April, 12},
{1, time.January, 1},
{1946, time.February, 4},
{1970, time.January, 1},
{1976, time.April, 1},
{1999, time.December, 1},
{1111111, time.June, 21},
}
zones := []int{-12, -10, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 8, 12}
for _, c := range cases {
d := date.New(c.year, c.month, c.day)
tUTC := d.UTC()
if !same(d, tUTC) {
t.Errorf("TimeUTC(%v) == %v, want date part %v", d, tUTC, d)
}
if tUTC.Location() != time.UTC {
t.Errorf("TimeUTC(%v) == %v, want %v", d, tUTC.Location(), time.UTC)
}
tLocal := d.Local()
if !same(d, tLocal) {
t.Errorf("TimeLocal(%v) == %v, want date part %v", d, tLocal, d)
}
if tLocal.Location() != time.Local {
t.Errorf("TimeLocal(%v) == %v, want %v", d, tLocal.Location(), time.Local)
}
for _, z := range zones {
location := time.FixedZone("zone", z*60*60)
tInLoc := d.In(location)
if !same(d, tInLoc) {
t.Errorf("TimeIn(%v) == %v, want date part %v", d, tInLoc, d)
}
if tInLoc.Location() != location {
t.Errorf("TimeIn(%v) == %v, want %v", d, tInLoc.Location(), location)
}
}
}
}
func ExampleNew() {
d := date.New(9999, time.December, 31)
fmt.Printf("The world ends on %s\n", d)
// Output: The world ends on 9999-12-31
}