我正在尝试对使用https://docs.aws.amazon.com/sdk-for-go/api/service/s3/#S3.ListObjectsV2Pages列出给定s3存储桶内容的函数进行单元测试。

在main.go文件中，我具有以下功能：

func listS3Objects(s3Bucket string,s3Prefix string,svc s3iface.S3API) ([]string,error) {

    input := &s3.ListObjectsV2Input{
        Bucket: aws.String(s3Bucket),Prefix: aws.String(s3Prefix),}

    var s3Items []string
    err := svc.ListObjectsV2Pages(input,func(resp *s3.ListObjectsV2Output,lastPage bool) bool {
        for _,s3Item := range resp.Contents {
            s3Items = append(s3Items,*s3Item.Key)
        }
        return true
    })

    if err != nil {
        if awsErr,ok := err.(awserr.Error); ok {
            return nil,awsErr
        }
        return nil,err
    }
    return s3Items,nil
}

在我的main_test.go文件中，我拥有：

type mockS3Client struct {
    s3iface.S3API
}

func (m *mockS3Client) ListObjectsV2Pages(input *s3.ListObjectsV2Input,fn func(*s3.ListObjectsV2Output,bool) bool) error {
    var s3Output s3.ListObjectsV2Output
    var s3Object s3.Object
    var s3Objects []*s3.Object
    s3Object.SetKey(*input.Bucket)
    s3Objects = append(s3Objects,&s3Object)
    s3Output.Contents = s3Objects

    fn(&s3Output,true)

    return nil
}

测试如下所示：

func TestListS3Objects(t *testing.T) {
    testBucket := "testBucket"
    testPrefix := "testPrefix"
    var mockSvc mockS3Client
    s3Items,_ := listS3Objects(testBucket,testPrefix,mockSvc.S3API)
    if len(s3Items) != 1 {
        t.Errorf("Expected '%v' elements but got '%v'",1,len(s3Items))
    }
    if s3Items[0] != testBucket {
        t.Errorf("Expected '%v' value but got '%v'",testBucket,s3Items[0])
    }
}

此测试生成以下堆栈跟踪：

--- FAIL: TestListS3Objects (0.00s)
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
    panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x5a0 pc=0x797066]

goroutine 7 [running]:
testing.tRunner.func1(0xc00017e300)
    /usr/local/go/src/testing/testing.go:874 +0x3a3
panic(0x800c20,0xc657c0)
    /usr/local/go/src/runtime/panic.go:679 +0x1b2
github.com/AirHelp/business-metrics-restore.listS3Objects(0x88d6aa,0xa,0x88d6b4,0x0,0x1,0xc000018dd8,0x44f278,0x5aa38b1b10f7,...)
    /workspaces/business-metrics-restore/bmr.go:189 +0x126
github.com/AirHelp/business-metrics-restore.TestListS3Objects(0xc00017e300)
    /workspaces/business-metrics-restore/bmr_test.go:59 +0x65
testing.tRunner(0xc00017e300,0x8a7fa8)
    /usr/local/go/src/testing/testing.go:909 +0xc9
created by testing.(*T).Run
    /usr/local/go/src/testing/testing.go:960 +0x350
FAIL    github.com/AirHelp/business-metrics-restore 0.044s
FAIL
Error: Tests failed.

我的印象是我的模拟版本的ListObjectsV2Pages可能存在一些问题，但无法找到根本原因。我试图让这个嘲笑的功能尽可能简单...

有人可以帮我吗？

谢谢！

最好的问候， 拉法尔。