要测试的go文件名必须于_test结尾
cal.go
package testcase
func sum(n int) int{
sum := 0
for i:=1;i<=n;i++{
sum += i
}
return sum
}
func sub(a,b int)int{
return a -b
}
package testpackage testcase
func sum(n int) int{
sum := 0
for i:=1;i<=n;i++{
sum += i
}
return sum
}
func sub(a,b int)int{
return a -b
}
package test