func TestEC2RoleProviderExpiryWindowIsExpired(t *testing.T) {
	server := initTestServer("2014-12-16T01:51:37Z", false)
	defer server.Close()

	p := &ec2rolecreds.EC2RoleProvider{
		Client:       ec2metadata.New(session.New(), &aws.Config{Endpoint: aws.String(server.URL + "/latest")}),
		ExpiryWindow: time.Hour * 1,
	}
	p.CurrentTime = func() time.Time {
		return time.Date(2014, 12, 15, 0, 51, 37, 0, time.UTC)
	}

	assert.True(t, p.IsExpired(), "Expect creds to be expired before retrieve.")

	_, err := p.Retrieve()
	assert.Nil(t, err, "Expect no error, %v", err)

	assert.False(t, p.IsExpired(), "Expect creds to not be expired after retrieve.")

	p.CurrentTime = func() time.Time {
		return time.Date(2014, 12, 16, 0, 55, 37, 0, time.UTC)
	}

	assert.True(t, p.IsExpired(), "Expect creds to be expired.")
}
// NewCredentials returns a pointer to a new Credentials object wrapping
// the EC2RoleProvider. Takes a ConfigProvider to create a EC2Metadata client.
// The ConfigProvider is satisfied by the session.Session type.
func NewCredentials(c client.ConfigProvider, options ...func(*EC2RoleProvider)) *credentials.Credentials {
	p := &EC2RoleProvider{
		Client: ec2metadata.New(c),
	}

	for _, option := range options {
		option(p)
	}

	return credentials.NewCredentials(p)
}
func TestEC2RoleProvider(t *testing.T) {
	server := initTestServer("2014-12-16T01:51:37Z", false)
	defer server.Close()

	p := &ec2rolecreds.EC2RoleProvider{
		Client: ec2metadata.New(session.New(), &aws.Config{Endpoint: aws.String(server.URL + "/latest")}),
	}

	creds, err := p.Retrieve()
	assert.Nil(t, err, "Expect no error, %v", err)

	assert.Equal(t, "accessKey", creds.AccessKeyID, "Expect access key ID to match")
	assert.Equal(t, "secret", creds.SecretAccessKey, "Expect secret access key to match")
	assert.Equal(t, "token", creds.SessionToken, "Expect session token to match")
}
func BenchmarkEC3RoleProvider(b *testing.B) {
	server := initTestServer("2014-12-16T01:51:37Z", false)
	defer server.Close()

	p := &ec2rolecreds.EC2RoleProvider{
		Client: ec2metadata.New(session.New(), &aws.Config{Endpoint: aws.String(server.URL + "/latest")}),
	}
	_, err := p.Retrieve()
	if err != nil {
		b.Fatal(err)
	}

	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		if _, err := p.Retrieve(); err != nil {
			b.Fatal(err)
		}
	}
}
func TestEC2RoleProviderFailAssume(t *testing.T) {
	server := initTestServer("2014-12-16T01:51:37Z", true)
	defer server.Close()

	p := &ec2rolecreds.EC2RoleProvider{
		Client: ec2metadata.New(session.New(), &aws.Config{Endpoint: aws.String(server.URL + "/latest")}),
	}

	creds, err := p.Retrieve()
	assert.Error(t, err, "Expect error")

	e := err.(awserr.Error)
	assert.Equal(t, "ErrorCode", e.Code())
	assert.Equal(t, "ErrorMsg", e.Message())
	assert.Nil(t, e.OrigErr())

	assert.Equal(t, "", creds.AccessKeyID, "Expect access key ID to match")
	assert.Equal(t, "", creds.SecretAccessKey, "Expect secret access key to match")
	assert.Equal(t, "", creds.SessionToken, "Expect session token to match")
}