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package ec2metadata_test
import (
"bytes"
"io/ioutil"
"net/http"
"net/http/httptest"
"path"
"strings"
"testing"
"github.com/stretchr/testify/assert"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/awserr"
"github.com/aws/aws-sdk-go/aws/ec2metadata"
"github.com/aws/aws-sdk-go/aws/request"
"github.com/aws/aws-sdk-go/aws/session"
)
const instanceIdentityDocument = `{
"devpayProductCodes" : null,
"availabilityZone" : "us-east-1d",
"privateIp" : "10.158.112.84",
"version" : "2010-08-31",
"region" : "us-east-1",
"instanceId" : "i-1234567890abcdef0",
"billingProducts" : null,
"instanceType" : "t1.micro",
"accountId" : "123456789012",
"pendingTime" : "2015-11-19T16:32:11Z",
"imageId" : "ami-5fb8c835",
"kernelId" : "aki-919dcaf8",
"ramdiskId" : null,
"architecture" : "x86_64"
}`
func initTestServer(path string, resp string) *httptest.Server {
return httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.RequestURI != path {
http.Error(w, "not found", http.StatusNotFound)
return
}
w.Write([]byte(resp))
}))
}
func TestEndpoint(t *testing.T) {
c := ec2metadata.New(session.New())
op := &request.Operation{
Name: "GetMetadata",
HTTPMethod: "GET",
HTTPPath: path.Join("/", "meta-data", "testpath"),
}
req := c.NewRequest(op, nil, nil)
assert.Equal(t, "http://169.254.169.254/latest", req.ClientInfo.Endpoint)
assert.Equal(t, "http://169.254.169.254/latest/meta-data/testpath", req.HTTPRequest.URL.String())
}
func TestGetMetadata(t *testing.T) {
server := initTestServer(
"/latest/meta-data/some/path",
"success", // real response includes suffix
)
defer server.Close()
c := ec2metadata.New(session.New(), &aws.Config{Endpoint: aws.String(server.URL + "/latest")})
resp, err := c.GetMetadata("some/path")
assert.NoError(t, err)
assert.Equal(t, "success", resp)
}
func TestGetRegion(t *testing.T) {
server := initTestServer(
"/latest/meta-data/placement/availability-zone",
"us-west-2a", // real response includes suffix
)
defer server.Close()
c := ec2metadata.New(session.New(), &aws.Config{Endpoint: aws.String(server.URL + "/latest")})
region, err := c.Region()
assert.NoError(t, err)
assert.Equal(t, "us-west-2", region)
}
func TestMetadataAvailable(t *testing.T) {
server := initTestServer(
"/latest/meta-data/instance-id",
"instance-id",
)
defer server.Close()
c := ec2metadata.New(session.New(), &aws.Config{Endpoint: aws.String(server.URL + "/latest")})
available := c.Available()
assert.True(t, available)
}
func TestMetadataNotAvailable(t *testing.T) {
c := ec2metadata.New(session.New())
c.Handlers.Send.Clear()
c.Handlers.Send.PushBack(func(r *request.Request) {
r.HTTPResponse = &http.Response{
StatusCode: int(0),
Status: http.StatusText(int(0)),
Body: ioutil.NopCloser(bytes.NewReader([]byte{})),
}
r.Error = awserr.New("RequestError", "send request failed", nil)
r.Retryable = aws.Bool(true) // network errors are retryable
})
available := c.Available()
assert.False(t, available)
}
func TestMetadataErrorResponse(t *testing.T) {
c := ec2metadata.New(session.New())
c.Handlers.Send.Clear()
c.Handlers.Send.PushBack(func(r *request.Request) {
r.HTTPResponse = &http.Response{
StatusCode: http.StatusBadRequest,
Status: http.StatusText(http.StatusBadRequest),
Body: ioutil.NopCloser(strings.NewReader("error message text")),
}
r.Retryable = aws.Bool(false) // network errors are retryable
})
data, err := c.GetMetadata("uri/path")
assert.Empty(t, data)
assert.Contains(t, err.Error(), "error message text")
}
func TestEC2RoleProviderInstanceIdentity(t *testing.T) {
server := initTestServer(
"/latest/dynamic/instance-identity/document",
instanceIdentityDocument,
)
defer server.Close()
c := ec2metadata.New(session.New(), &aws.Config{Endpoint: aws.String(server.URL + "/latest")})
doc, err := c.GetInstanceIdentityDocument()
assert.Nil(t, err, "Expect no error, %v", err)
assert.Equal(t, doc.AccountID, "123456789012")
assert.Equal(t, doc.AvailabilityZone, "us-east-1d")
assert.Equal(t, doc.Region, "us-east-1")
}
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