This package is a set of one-liners built up on github.com/google/go-cmp package.
-
I like one-liners, they make code easier to understand.
Some of my thoughts about testify
- The whole world uses
assertto fail test immediately, andexpectto mark test as failig but continue execution, but testify usesrequire/assertrespectively, why?
For example, GoogleTest Primer says:
The assertions come in pairs that test the same thing but have different effects on the current function.
ASSERT_*versions generate fatal failures when they fail, and abort the current function.EXPECT_*versions generate nonfatal failures, which don’t abort the current function.
- Sometimes testify gives you enormous/weird outputs.
For example, try to compare structs with the same time in different timezones:
package tf
import (
"testing"
"time"
"github.com/stretchr/testify/assert"
)
type User struct {
CreatedAt time.Time
}
func Test_assert(t *testing.T) {
berlin, err := time.LoadLocation("Europe/Berlin")
if err != nil {
panic(err)
}
now := time.Now()
u1 := User{
CreatedAt: now.In(berlin),
}
u2 := User{
CreatedAt: now.In(time.UTC),
}
assert.Equal(t, u1, u2)
}You will get this output:
--- FAIL: Test_assert (0.00s)
tf_test.go:27:
Error Trace: /tf/tf_test.go:27
Error: Not equal:
expected: tf.User{CreatedAt:time.Date(2025, time.May, 2, 21, 38, 18, 842555000, time.Location("Europe/Berlin"))}
actual : tf.User{CreatedAt:time.Date(2025, time.May, 2, 19, 38, 18, 842555000, time.UTC)}
Diff:
--- Expected
+++ Actual
@@ -4,920 +4,3 @@
ext: (int64) 63881811498,
- loc: (*time.Location)({
- name: (string) (len=13) "Europe/Berlin",
- zone: ([]time.zone) (len=9) {
- (time.zone) {
- name: (string) (len=3) "LMT",
- offset: (int) 3208,
- isDST: (bool) false
- },
- (time.zone) {
- name: (string) (len=4) "CEST",
- offset: (int) 7200,
- isDST: (bool) true
- },
- (time.zone) {
- name: (string) (len=3) "CET",
- offset: (int) 3600,
- isDST: (bool) false
- },
- (time.zone) {
- name: (string) (len=4) "CEST",
- offset: (int) 7200,
- isDST: (bool) true
- },
- (time.zone) {
- name: (string) (len=3) "CET",
- offset: (int) 3600,
- isDST: (bool) false
- },
- (time.zone) {
- name: (string) (len=4) "CEMT",
- offset: (int) 10800,
- isDST: (bool) true
- },
- (time.zone) {
- name: (string) (len=4) "CEMT",
- offset: (int) 10800,
- isDST: (bool) true
- },
- (time.zone) {
- name: (string) (len=4) "CEST",
- offset: (int) 7200,
- isDST: (bool) true
- },
- (time.zone) {
- name: (string) (len=3) "CET",
- offset: (int) 3600,
- isDST: (bool) false
- }
- },
- tx: ([]time.zoneTrans) (len=143) {
- (time.zoneTrans) {
- when: (int64) -2422054408,
- index: (uint8) 2,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -1693706400,
- index: (uint8) 1,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -1680483600,
- index: (uint8) 2,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -1663455600,
- index: (uint8) 3,
- isstd: (bool) true,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -1650150000,
- index: (uint8) 4,
- isstd: (bool) true,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -1632006000,
- index: (uint8) 3,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -1618700400,
- index: (uint8) 4,
- isstd: (bool) true,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -938905200,
- index: (uint8) 3,
- isstd: (bool) true,
- isutc: (bool) true
- },
- (time.zoneTrans) {
- when: (int64) -857257200,
- index: (uint8) 4,
- isstd: (bool) true,
- isutc: (bool) true
- },
- (time.zoneTrans) {
- when: (int64) -844556400,
- index: (uint8) 3,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -828226800,
- index: (uint8) 4,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -812502000,
- index: (uint8) 3,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -796777200,
- index: (uint8) 4,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -781052400,
- index: (uint8) 3,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -776563200,
- index: (uint8) 5,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -765936000,
- index: (uint8) 1,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -761180400,
- index: (uint8) 4,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -748479600,
- index: (uint8) 3,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -733273200,
- index: (uint8) 4,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -717631200,
- index: (uint8) 3,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -714610800,
- index: (uint8) 6,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -710380800,
- index: (uint8) 1,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -701910000,
- index: (uint8) 4,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -684975600,
- index: (uint8) 3,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -670460400,
- index: (uint8) 4,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -654130800,
- index: (uint8) 3,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) -639010800,
- index: (uint8) 4,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 323830800,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 338950800,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 354675600,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 370400400,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 386125200,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 401850000,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 417574800,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 433299600,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 449024400,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 465354000,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 481078800,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 496803600,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 512528400,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 528253200,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 543978000,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 559702800,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 575427600,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 591152400,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 606877200,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 622602000,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 638326800,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 654656400,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 670381200,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 686106000,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 701830800,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 717555600,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 733280400,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 749005200,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
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- },
- (time.zoneTrans) {
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- },
- (time.zoneTrans) {
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- index: (uint8) 7,
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- isutc: (bool) false
- },
- (time.zoneTrans) {
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- },
- (time.zoneTrans) {
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- (time.zoneTrans) {
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- (time.zoneTrans) {
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- },
- (time.zoneTrans) {
- when: (int64) 1729990800,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 1743296400,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 1761440400,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 1774746000,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 1792890000,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 1806195600,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 1824944400,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 1837645200,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 1856394000,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 1869094800,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 1887843600,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 1901149200,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 1919293200,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 1932598800,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 1950742800,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 1964048400,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 1982797200,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 1995498000,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 2014246800,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 2026947600,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 2045696400,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 2058397200,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 2077146000,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 2090451600,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 2108595600,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 2121901200,
- index: (uint8) 7,
- isstd: (bool) false,
- isutc: (bool) false
- },
- (time.zoneTrans) {
- when: (int64) 2140045200,
- index: (uint8) 8,
- isstd: (bool) false,
- isutc: (bool) false
- }
- },
- extend: (string) (len=26) "CET-1CEST,M3.5.0,M10.5.0/3",
- cacheStart: (int64) 1743296400,
- cacheEnd: (int64) 1761440400,
- cacheZone: (*time.zone)({
- name: (string) (len=4) "CEST",
- offset: (int) 7200,
- isDST: (bool) true
- })
- })
+ loc: (*time.Location)(<nil>)
}
Test: Test_assert
FAIL
FAIL github.com/Snikimonkd/tf 0.180s
FAIL
There are 2 packages in this lib: assert and expect. Both of them provide same functions, the only difference is that assert fails test immediately, while expect marks test as failed and continues execution.
package tf
import (
"testing"
"time"
"github.com/Snikimonkd/tf/assert"
)
type User struct {
CreatedAt time.Time
}
func Test_User(t *testing.T) {
berlin, err := time.LoadLocation("Europe/Berlin")
assert.Nil(t, err)
now := time.Now()
u1 := User{
CreatedAt: now.In(berlin),
}
u2 := User{
CreatedAt: now.In(time.UTC),
}
assert.Equal(t, u1, u2)
}You can use go-cmp options:
package tf
import (
"testing"
"time"
"github.com/google/go-cmp/cmp/cmpopts"
"github.com/Snikimonkd/tf/assert"
)
func Test_Slices(t *testing.T) {
want := []int{1, 2, 3}
got := []int{3, 2, 1}
assert.Equal(
t,
want,
got,
cmpopts.SortSlices(func(x, y int) bool {
return x < y
}),
)
}There are some predeclared go-cmp options located in package github.com/Snikimonkd/tf/options. For example previous example can be rewritten shorter:
package tf
import (
"testing"
"time"
"github.com/google/go-cmp/cmp/cmpopts"
"github.com/Snikimonkd/tf/assert"
opts "github.com/Snikimonkd/tf/options"
)
func Test_Slices(t *testing.T) {
want := []int{1, 2, 3}
got := []int{3, 2, 1}
assert.Equal(t, want, got, opts.SortSlicesOpt[int]())
}