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ec2info_test.go
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ec2info_test.go
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package aws
import (
"os"
"sync"
"testing"
"time"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/ec2"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestTag_MissingKey(t *testing.T) {
ec2meta := MockEC2Meta(map[string]string{"instance-id": "i-1234"}, nil, "")
client := DummyInstanceDescriber{
tags: []*ec2.Tag{
{
Key: aws.String("foo"),
Value: aws.String("bar"),
},
{
Key: aws.String("baz"),
Value: aws.String("qux"),
},
},
}
e := &Ec2Info{
describer: func() (InstanceDescriber, error) {
return client, nil
},
metaClient: ec2meta,
cache: make(map[string]interface{}),
}
assert.Empty(t, must(e.Tag("missing")))
assert.Equal(t, "default", must(e.Tag("missing", "default")))
}
func TestTag_ValidKey(t *testing.T) {
ec2meta := MockEC2Meta(map[string]string{"instance-id": "i-1234"}, nil, "")
client := DummyInstanceDescriber{
tags: []*ec2.Tag{
{
Key: aws.String("foo"),
Value: aws.String("bar"),
},
{
Key: aws.String("baz"),
Value: aws.String("qux"),
},
},
}
e := &Ec2Info{
describer: func() (InstanceDescriber, error) {
return client, nil
},
metaClient: ec2meta,
cache: make(map[string]interface{}),
}
assert.Equal(t, "bar", must(e.Tag("foo")))
assert.Equal(t, "bar", must(e.Tag("foo", "default")))
}
func TestTags(t *testing.T) {
ec2meta := MockEC2Meta(map[string]string{"instance-id": "i-1234"}, nil, "")
client := DummyInstanceDescriber{
tags: []*ec2.Tag{
{
Key: aws.String("foo"),
Value: aws.String("bar"),
},
{
Key: aws.String("baz"),
Value: aws.String("qux"),
},
},
}
e := &Ec2Info{
describer: func() (InstanceDescriber, error) {
return client, nil
},
metaClient: ec2meta,
cache: make(map[string]interface{}),
}
assert.Equal(t, map[string]string{"foo": "bar", "baz": "qux"}, must(e.Tags()))
}
func TestTag_NonEC2(t *testing.T) {
ec2meta := MockEC2Meta(nil, nil, "")
ec2meta.nonAWS = true
client := DummyInstanceDescriber{}
e := &Ec2Info{
describer: func() (InstanceDescriber, error) {
return client, nil
},
metaClient: ec2meta,
cache: make(map[string]interface{}),
}
assert.Equal(t, "", must(e.Tag("foo")))
assert.Equal(t, "default", must(e.Tag("foo", "default")))
}
func TestNewEc2Info(t *testing.T) {
ec2meta := MockEC2Meta(map[string]string{"instance-id": "i-1234"}, nil, "")
client := DummyInstanceDescriber{
tags: []*ec2.Tag{
{
Key: aws.String("foo"),
Value: aws.String("bar"),
},
{
Key: aws.String("baz"),
Value: aws.String("qux"),
},
},
}
e := NewEc2Info(ClientOptions{})
e.describer = func() (InstanceDescriber, error) {
return client, nil
}
e.metaClient = ec2meta
assert.Equal(t, "bar", must(e.Tag("foo")))
assert.Equal(t, "bar", must(e.Tag("foo", "default")))
}
func TestGetRegion(t *testing.T) {
// unset AWS region env vars for clean tests
os.Unsetenv("AWS_REGION")
os.Unsetenv("AWS_DEFAULT_REGION")
t.Run("with AWS_REGION set", func(t *testing.T) {
t.Setenv("AWS_REGION", "kalamazoo")
region, err := getRegion()
require.NoError(t, err)
assert.Empty(t, region)
})
t.Run("with AWS_DEFAULT_REGION set", func(t *testing.T) {
t.Setenv("AWS_DEFAULT_REGION", "kalamazoo")
region, err := getRegion()
require.NoError(t, err)
assert.Empty(t, region)
})
t.Run("with no AWS_REGION, AWS_DEFAULT_REGION set", func(t *testing.T) {
metaClient := NewDummyEc2Meta()
region, err := getRegion(metaClient)
require.NoError(t, err)
assert.Equal(t, "unknown", region)
})
t.Run("infer from EC2 metadata", func(t *testing.T) {
ec2meta := MockEC2Meta(nil, nil, "us-east-1")
region, err := getRegion(ec2meta)
require.NoError(t, err)
assert.Equal(t, "us-east-1", region)
})
}
func TestGetClientOptions(t *testing.T) {
co := GetClientOptions()
assert.Equal(t, ClientOptions{Timeout: 500 * time.Millisecond}, co)
t.Run("valid AWS_TIMEOUT, first call", func(t *testing.T) {
t.Setenv("AWS_TIMEOUT", "42")
// reset the Once
coInit = sync.Once{}
co = GetClientOptions()
assert.Equal(t, ClientOptions{Timeout: 42 * time.Millisecond}, co)
})
t.Run("valid AWS_TIMEOUT, non-first call", func(t *testing.T) {
t.Setenv("AWS_TIMEOUT", "123")
// without resetting the Once, expect to be reused
co = GetClientOptions()
assert.Equal(t, ClientOptions{Timeout: 42 * time.Millisecond}, co)
})
t.Run("invalid AWS_TIMEOUT", func(t *testing.T) {
t.Setenv("AWS_TIMEOUT", "foo")
// reset the Once
coInit = sync.Once{}
assert.Panics(t, func() {
GetClientOptions()
})
})
}