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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package gcp
import (
"context"
"fmt"
"testing"
"github.com/google/go-cmp/cmp"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/sdk/resource"
)
var (
notOnGCE = func() bool { return false }
onGCE = func() bool { return true }
)
func getenv(m map[string]string) func(string) string {
return func(s string) string {
if m == nil {
return ""
}
return m[s]
}
}
type client struct {
m map[string]string
}
func setupForTest(c *CloudRun, mc metadataClient, ongce func() bool, getenv func(string) string) {
c.mc = mc
c.onGCE = ongce
c.getenv = getenv
}
func (c *client) Get(s string) (string, error) {
got, ok := c.m[s]
if !ok {
return "", fmt.Errorf("%q do not exist", s)
} else if got == "" {
return "", fmt.Errorf("%q is empty", s)
}
return got, nil
}
func (c *client) InstanceID() (string, error) {
return c.Get("instance/id")
}
func (c *client) ProjectID() (string, error) {
return c.Get("project/project-id")
}
var _ metadataClient = (*client)(nil)
func TestCloudRunDetectorNotOnGCE(t *testing.T) {
ctx := context.Background()
c := NewCloudRun()
setupForTest(c, nil, notOnGCE, getenv(nil))
if res, err := c.Detect(ctx); res != nil || err != nil {
t.Errorf("Expect c.Detect(ctx) to return (nil, nil), got (%v, %v)", res, err)
}
}
func TestCloudRunDetectorExpectSuccess(t *testing.T) {
ctx := context.Background()
metadata := map[string]string{
"project/project-id": "foo",
"instance/id": "bar",
"instance/region": "/projects/123/regions/utopia",
}
envvars := map[string]string{
"K_SERVICE": "x-service",
}
want, err := resource.New(
ctx,
resource.WithAttributes(
attribute.String("cloud.account.id", "foo"),
attribute.String("cloud.provider", "gcp"),
attribute.String("cloud.region", "utopia"),
attribute.String("service.instance.id", "bar"),
attribute.String("service.name", "x-service"),
attribute.String("service.namespace", "cloud-run-managed"),
),
)
if err != nil {
t.Fatalf("failed to create a resource: %v", err)
}
c := NewCloudRun()
setupForTest(c, &client{m: metadata}, onGCE, getenv(envvars))
if res, err := c.Detect(ctx); err != nil {
t.Fatalf("got unexpected failure: %v", err)
} else if diff := cmp.Diff(want, res); diff != "" {
t.Errorf("detected resource differ from expected (-want, +got)\n%s", diff)
}
}
func TestCloudRunDetectorExpectFail(t *testing.T) {
ctx := context.Background()
tests := []struct {
name string
metadata map[string]string
envvars map[string]string
}{
{
name: "Missing ProjectID",
metadata: map[string]string{
"instance/id": "bar",
"instance/region": "utopia",
},
envvars: map[string]string{
"K_SERVICE": "x-service",
},
},
{
name: "Missing InstanceID",
metadata: map[string]string{
"project/project-id": "foo",
"instance/region": "utopia",
},
envvars: map[string]string{
"K_SERVICE": "x-service",
},
},
{
name: "Missing Region",
metadata: map[string]string{
"project/project-id": "foo",
"instance/id": "bar",
},
envvars: map[string]string{
"K_SERVICE": "x-service",
},
},
{
name: "Missing K_SERVICE envvar",
metadata: map[string]string{
"project/project-id": "foo",
"instance/id": "bar",
"instance/region": "utopia",
},
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
c := NewCloudRun()
setupForTest(c, &client{m: test.metadata}, onGCE, getenv(test.envvars))
if res, err := c.Detect(ctx); err == nil {
t.Errorf("Expect c.Detect(ctx) to return error, got nil (resource: %v)", res)
} else {
t.Logf("err: %v", err)
}
})
}
}
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