/
single.go
58 lines (52 loc) · 1.71 KB
/
single.go
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// Copyright 2022 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package weavertest
import (
"context"
"fmt"
"os"
rt "runtime"
"testing"
"time"
"github.com/ServiceWeaver/weaver"
"github.com/ServiceWeaver/weaver/runtime"
)
// initSingleProcess initializes a brand new single-process execution environment and
// returns the root component for the new application.
//
// config contains configuration identical to what might be found in a file passed
// when deploying an application. It can contain application level as well as
// component level configs. config is allowed to be empty.
func initSingleProcess(ctx context.Context, t testing.TB, config string) weaver.Instance {
t.Helper()
ctx, cancelFunc := context.WithCancel(ctx)
t.Cleanup(func() {
cancelFunc()
maybeLogStacks()
})
ctx = context.WithValue(ctx, runtime.BootstrapKey{}, runtime.Bootstrap{
TestConfig: config,
})
return weaver.Init(ctx)
}
func maybeLogStacks() {
// Disable early return to find background work that is not obeying cancellation.
if true {
return
}
time.Sleep(time.Second) // Hack to wait for goroutines to end
buf := make([]byte, 1<<20)
n := rt.Stack(buf, true)
fmt.Fprintf(os.Stderr, "%s\n", string(buf[:n]))
}