85 lines
1.8 KiB
Go
85 lines
1.8 KiB
Go
package context
|
|
|
|
import (
|
|
"runtime"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
// TestWithTrace ensures that tracing has the expected values in the context.
|
|
func TestWithTrace(t *testing.T) {
|
|
pc, file, _, _ := runtime.Caller(0) // get current caller.
|
|
f := runtime.FuncForPC(pc)
|
|
|
|
base := []valueTestCase{
|
|
{
|
|
key: "trace.id",
|
|
notnilorempty: true,
|
|
},
|
|
|
|
{
|
|
key: "trace.file",
|
|
expected: file,
|
|
notnilorempty: true,
|
|
},
|
|
{
|
|
key: "trace.line",
|
|
notnilorempty: true,
|
|
},
|
|
{
|
|
key: "trace.start",
|
|
notnilorempty: true,
|
|
},
|
|
}
|
|
|
|
ctx, done := WithTrace(Background())
|
|
defer done("this will be emitted at end of test")
|
|
|
|
checkContextForValues(t, ctx, append(base, valueTestCase{
|
|
key: "trace.func",
|
|
expected: f.Name(),
|
|
}))
|
|
|
|
traced := func() {
|
|
parentID := ctx.Value("trace.id") // ensure the parent trace id is correct.
|
|
|
|
pc, _, _, _ := runtime.Caller(0) // get current caller.
|
|
f := runtime.FuncForPC(pc)
|
|
ctx, done := WithTrace(ctx)
|
|
defer done("this should be subordinate to the other trace")
|
|
time.Sleep(time.Second)
|
|
checkContextForValues(t, ctx, append(base, valueTestCase{
|
|
key: "trace.func",
|
|
expected: f.Name(),
|
|
}, valueTestCase{
|
|
key: "trace.parent.id",
|
|
expected: parentID,
|
|
}))
|
|
}
|
|
traced()
|
|
|
|
time.Sleep(time.Second)
|
|
}
|
|
|
|
type valueTestCase struct {
|
|
key string
|
|
expected interface{}
|
|
notnilorempty bool // just check not empty/not nil
|
|
}
|
|
|
|
func checkContextForValues(t *testing.T, ctx Context, values []valueTestCase) {
|
|
|
|
for _, testcase := range values {
|
|
v := ctx.Value(testcase.key)
|
|
if testcase.notnilorempty {
|
|
if v == nil || v == "" {
|
|
t.Fatalf("value was nil or empty for %q: %#v", testcase.key, v)
|
|
}
|
|
continue
|
|
}
|
|
|
|
if v != testcase.expected {
|
|
t.Fatalf("unexpected value for key %q: %v != %v", testcase.key, v, testcase.expected)
|
|
}
|
|
}
|
|
}
|