[英]How do I test my interface functions?
Third day in Go so pardon if this is a newb question ;). 第三天去吧,如果这是一个新问题,请原谅;)。 I am creating a simple calculator that will eventually have many different tasks: addition, subtraction, multiplication, etc, etc...Each of the tasks will have 2 functions: First and Second.
我正在创建一个简单的计算器,该计算器最终将具有许多不同的任务:加法,减法,乘法等...每个任务将具有2个功能:第一和第二。
package main
import (
"github.com/mytestproj/calculator"
)
type Calc interface {
First(x int) int
Second(x int) int
}
func main() {
x := 16
var i Calc
a := calculator.Add{}
i = a
i.First(x)
i.Second(x)
}
I currently have everything organized as: 我目前将所有内容整理为:
github.com/
mytestproj/
calculator/
addition.go
addition_test.go
subtraction.go
subtraction_test.go
main/
main.go
In addition.go I have: 另外,我有:
package calculator
type Add struct{}
func BasicAddition(x int) int { // this won't be in the final release
return x + 2
}
func (h Add) First(x int) int {
x += 5
return x
}
func (h Add) Second(x int) int {
x += 10
return x
}
And in addition_test.go I have: 另外,我有:
package calculator
import "testing"
func TestBasicAddition(t *testing.T) {
x := 30
if y := BasicAddition(x); y != 32 {
t.Errorf("Mine is %v", y)
}
}
func TestFirst(t *testing.T) {
x := 10
if y := First(x); y != 15 {
t.Errorf("First is %v", y)
}
}
When I run my test I get an error: 当我运行测试时,出现错误:
# github.com/mytestproj/calculator
./addition_test.go:15: undefined: First
FAIL github.com/mytestproj/calculator [build failed]
My question: How do I test "First?" 我的问题: 如何测试“第一”?
If I remove the test for First completely then the tests run fine and it passes. 如果我完全删除了First的测试,则测试运行正常并且通过。
Secondary question: The idea is to build a calculator app with many different functions. 第二个问题:想法是构建具有许多不同功能的计算器应用程序。 If there's a better way to organize the code then please let me know.
如果有更好的方法来组织代码,请告诉我。
First
is a method on type Add
. First
是类型Add
的方法。 For example, 例如,
a := Add{}
a.First(x)
addition.go
package calculator
type Add struct{}
func BasicAddition(x int) int { // this won't be in the final release
return x + 2
}
func (h Add) First(x int) int {
x += 5
return x
}
func (h Add) Second(x int) int {
x += 10
return x
}
addition_test.go
package calculator
import "testing"
func TestBasicAddition(t *testing.T) {
x := 30
if y := BasicAddition(x); y != 32 {
t.Errorf("Mine is %v", y)
}
}
func TestFirst(t *testing.T) {
x := 10
a := Add{}
if y := a.First(x); y != 15 {
t.Errorf("First is %v", y)
}
}
Output: 输出:
$ go test -v
=== RUN TestBasicAddition
--- PASS: TestBasicAddition (0.00s)
=== RUN TestFirst
--- PASS: TestFirst (0.00s)
PASS
ok so/calculator 0.002s
$
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