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package tracing
import (
"context"
"os"
"reflect"
"testing"
"github.com/stretchr/testify/require"
"gitlab.com/gitlab-org/labkit/correlation"
)
func TestNewEnvInjector(t *testing.T) {
tests := []struct {
name string
tracingEnv string
correlationID string
env []string
wantEnv []string
}{
{
name: "trivial",
},
{
name: "gitlab_tracing_config",
tracingEnv: "opentracing://null",
wantEnv: []string{
"GITLAB_TRACING=opentracing://null",
},
},
{
name: "merge",
tracingEnv: "opentracing://null",
env: []string{
"A=1",
},
wantEnv: []string{
"A=1",
"GITLAB_TRACING=opentracing://null",
},
},
{
name: "correlation",
correlationID: "abc123",
env: []string{},
wantEnv: []string{
"CORRELATION_ID=abc123",
},
},
{
name: "correlation_merge",
tracingEnv: "opentracing://null",
correlationID: "abc123",
env: []string{"A=1"},
wantEnv: []string{
"A=1",
"CORRELATION_ID=abc123",
"GITLAB_TRACING=opentracing://null",
},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if tt.tracingEnv != "" {
resetEnvironment := modifyEnvironment(tracingEnvKey, tt.tracingEnv)
defer resetEnvironment()
} else {
resetEnvironment := clearEnvironment(tracingEnvKey)
defer resetEnvironment()
}
envInjector := NewEnvInjector()
ctx := context.Background()
if tt.correlationID != "" {
ctx = correlation.ContextWithCorrelation(ctx, tt.correlationID)
}
got := envInjector(ctx, tt.env)
require.Equal(t, tt.wantEnv, got)
})
}
}
// modifyEnvironment will change an environment variable and return a func suitable
// for `defer` to change the value back.
func modifyEnvironment(key string, value string) func() {
oldValue, hasOldValue := os.LookupEnv(key)
os.Setenv(key, value)
return func() {
if hasOldValue {
os.Setenv(key, oldValue)
} else {
os.Unsetenv(key)
}
}
}
// clearEnvironment will clear an environment variable and return a func suitable
// for `defer` to change the value back.
func clearEnvironment(key string) func() {
oldValue, hasOldValue := os.LookupEnv(key)
if !hasOldValue {
return func() {
// Nothing to do
}
}
os.Unsetenv(key)
return func() {
if hasOldValue {
os.Setenv(key, oldValue)
}
}
}
func Test_appendMapToEnv(t *testing.T) {
tests := []struct {
name string
env []string
envMap map[string]string
want []string
}{
{
name: "empty_case",
env: nil,
envMap: nil,
want: nil,
},
{
name: "no_new_values",
env: []string{"A=1"},
envMap: nil,
want: []string{"A=1"},
},
{
name: "no_original_values",
env: nil,
envMap: map[string]string{"A": "1"},
want: []string{"A=1"},
},
{
name: "merge_values",
env: []string{"A=1"},
envMap: map[string]string{"B": "2"},
want: []string{"A=1", "B=2"},
},
{
name: "merge_conflicts",
env: []string{"A=1", "C=3"},
envMap: map[string]string{"B": "2", "C": "4"},
want: []string{"A=1", "C=3", "B=2", "C=4"},
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if got := appendMapToEnv(tt.env, tt.envMap); !reflect.DeepEqual(got, tt.want) {
t.Errorf("appendMapToEnv() = %v, want %v", got, tt.want)
}
})
}
}
|
