Closed as not planned
Description
Go version
go version go1.23.4 windows/amd64
Output of go env in your module/workspace:
set GO111MODULE=on
set GOARCH=amd64
set GOBIN=
set GOCACHE=D:\Enviornment\GO\src\cache
set GOENV=C:\Users\admin\AppData\Roaming\go\env
set GOEXE=.exe
set GOEXPERIMENT=
set GOFLAGS=
set GOHOSTARCH=amd64
set GOHOSTOS=windows
set GOINSECURE=
set GOMODCACHE=D:\Workspace\GO\pkg\mod
set GONOPROXY=gitee.com
set GONOSUMDB=gitee.com
set GOOS=windows
set GOPATH=D:\Workspace\GO
set GOPRIVATE=gitee.com
set GOPROXY=https://goproxy.cn,direct
set GOROOT=D:\Enviornment\GO
set GOSUMDB=sum.golang.org
set GOTMPDIR=
set GOTOOLCHAIN=auto
set GOTOOLDIR=D:\Enviornment\GO\pkg\tool\windows_amd64
set GOVCS=
set GOVERSION=go1.23.4
set GODEBUG=
set GOTELEMETRY=local
set GOTELEMETRYDIR=C:\Users\admin\AppData\Roaming\go\telemetry
set GCCGO=gccgo
set GOAMD64=v1
set AR=ar
set CC=gcc
set CXX=g++
set CGO_ENABLED=1
set GOMOD=D:\Workspace\GO\src\gitlab\readboy\wrong-question-book\go.mod
set GOWORK=
set CGO_CFLAGS=-O2 -g
set CGO_CPPFLAGS=
set CGO_CXXFLAGS=-O2 -g
set CGO_FFLAGS=-O2 -g
set CGO_LDFLAGS=-O2 -g
set PKG_CONFIG=pkg-config
set GOGCCFLAGS=-m64 -mthreads -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=C:\Users\admin\AppData\Local\Temp\go-build2290248184=/tmp/go-build -gno-record-gcc-switchesWhat did you do?
package utils_test
import (
"fmt"
"math"
"testing"
)
func TestToPercentage(t *testing.T) {
testcases := []struct {
value float64
digit int
want string
}{
// {0.123456, 2, "12.35%"},
// {0, 0, "0"},
// {0.123456, 4, "12.3456%"},
// {0.5, 0, "50%"},
// {0.5, 1, "50%"},
// {1, 0, "100%"},
{0.5666666666666667, 0, "57%"},
}
for idx, tc := range testcases {
got1 := ToPercentage(tc.value, tc.digit)
got2 := ToPercentage2(tc.value, tc.digit)
if got1 != got2 {
t.Errorf("%d. ToPercentage(%v) = %s, value1: %s, value2: %s", idx, tc.value, tc.want, got1, got2)
}
}
}
func ToPercentage(value float64, n int) string {
if value == 0 {
return "0"
}
r2 := fmt.Sprintf("%v%%", math.Round(value*math.Pow10(n+2))/math.Pow10(n))
return r2
}
func ToPercentage2(value float64, n int) string {
if value == 0 {
return "0"
}
return fmt.Sprintf("%v%%", Round(value, n+2)*100)
}
func Round(value float64, digit int) float64 {
return math.Round(value*math.Pow10(digit)) / math.Pow10(digit)
}
What did you see happen?
--- FAIL: TestToPercentage (0.00s)
d:\Workspace\GO\src\gitlab\readboy\wrong-question-book\utils\ratio_test.go:27: 0. ToPercentage(0.5666666666666667) = 57%, value1: 57%, value2: 56.99999999999999%
FAIL
FAIL wrong-question-book/utils 0.652s
FAIL
What did you expect to see?
the testcase is correct
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