如何在 terratest 中扮演一个角色

Question

我正在为 terraform 模块编写测试用例。 我有一个假设角色，我想将它传递给我的 go 测试。 我不知道如何通过它。 我将它定义为一个常量，然后我应该如何传递它，以便在 terraform init 和 terraform apply, destroy 期间调用它。

package test

import (
    "testing"

    "github.com/gruntwork-io/terratest/modules/aws"
    "github.com/gruntwork-io/terratest/modules/terraform"
    "github.com/stretchr/testify/assert"
    "github.com/stretchr/testify/require"
)


// An example of how to test the Terraform module in examples/terraform-aws-network-example using Terratest.
func TestTerraformAwsNetworkExample(t *testing.T) {
    t.Parallel()

    const authAssumeRoleEnvVar = "TERRATEST_IAM_ROLE"

    // Give the VPC and the subnets correct CIDRs
    vpcCidr := "1x.x.x.x/20"
    Env := "staging"
    privateSubnetCidr := []string{"1x.x.x.x/30"}
    publicSubnetCidr := []string{"1x.x.x.x/30"}
    Tag := map[string]string{"owner":"xxx"}
    awsRegion := "us-east-1"

    terraformOptions := &terraform.Options{
        // The path to where our Terraform code is located
        TerraformDir: "..",

        // Variables to pass to our Terraform code using -var options
        Vars: map[string]interface{}{
            "vpc_cidr":       vpcCidr,
            "env": Env,
            "private_subnet_cidrs": privateSubnetCidr,
            "public_subnet_cidrs":  publicSubnetCidr,
            "tags" : Tag,
        },

        EnvVars: map[string]string{
                 "AWS_DEFAULT_REGION": awsRegion,

        },
    }

    // At the end of the test, run `terraform destroy` to clean up any resources that were created
    defer terraform.Destroy(t, terraformOptions)

    // This will run `terraform init` and `terraform apply` and fail the test if there are any errors
    terraform.InitAndApply(t, terraformOptions)

    // Run `terraform output` to get the value of an output variable
    publicSubnetId := terraform.Output(t, terraformOptions, "public_subnet_ids")
    privateSubnetId := terraform.Output(t, terraformOptions, "private_subnet_ids")
    vpcId := terraform.Output(t, terraformOptions, "vpc_id")

    subnets := aws.GetSubnetsForVpc(t, vpcId, awsRegion)

    require.Equal(t, 2, len(subnets))
    // Verify if the network that is supposed to be public is really public
    assert.True(t, aws.IsPublicSubnet(t, publicSubnetId, awsRegion))
    // Verify if the network that is supposed to be private is really private
    assert.False(t, aws.IsPublicSubnet(t, privateSubnetId, awsRegion))
}

Answer 1

**

这段代码是不可测试的，所以你不能测试它。

** https://github.com/gruntwork-io/terratest/blob/f3916f7a5f58e3fedf603388d3e3e8052d6a47a3/modules/aws/auth.go#L18

我希望他们可以像这样重构它：

var AuthAssumeRoleEnvVar string

func SetAuthAssumeRoleEnvVar(role string){
    AuthAssumeRoleEnvVar = role
}

func NewAuthenticatedSession(region string) (*session.Session, error) {
    if assumeRoleArn, ok := os.LookupEnv(AuthAssumeRoleEnvVar); ok {
        return NewAuthenticatedSessionFromRole(region, assumeRoleArn)
    } else {
        return NewAuthenticatedSessionFromDefaultCredentials(region)
    }
}

这样我们就可以这样称呼它：

aws.SetAuthAssumeRoleEnvVar("testrole")
aws.NewAuthenticatedSession(region)

Answer 2

如文档中所述，将此变量 TERRATEST_IAM_ROLE 作为 os 环境变量传递的唯一方法您也可以将其定义为后端文件，但如果您有读取值的断言测试用例，则不会被选中，因为它使用 aws cli

所以我做了一些这样的事情，它奏效了。

import (

    "os"


)
 os.Setenv("TERRATEST_IAM_ROLE", "arn:aws:iam::xxxx/xxxx")