jschoubben
1c20b9fb9b
mesh/merge-gate checking again: Issue 1304 step 2. Rejected in review round 1 only because main's go/merge-check.sh still required go/vendor. Step 1, mesh-…
mesh/repo-check checking again: Issue 1304 step 2. Rejected in review round 1 only because main's go/merge-check.sh still required go/vendor. Step 1, mesh-…
mesh/delivery stopped: the pull request closed unmerged
75 lines
2.7 KiB
Go
75 lines
2.7 KiB
Go
// Package testbus is the bus an integration test of the SDK's Go binding runs against: a server of
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// its own, of the release go.mod pins, started for the one test and gone after it.
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//
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// **Why one per test.** A test that reaches a shared bus asserts, reads and removes objects by fixed
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// name — a stream, a consumer — and two tests at once would step on each other's: one deleting what
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// the other is reading, one leaving a stream behind for the next to trip on. A server per test makes
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// every test start from nothing and leave nothing, so the suite is the same run in any order, at any
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// parallelism, under the race detector, on a workstation or on the build seat.
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//
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// **No catalogue pin check.** mesh-controller's testbus also checks the server's release against the
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// catalogue's bus image and the mesh's facts snapshot (novox/hq ADR 0227 rule 9) — the SDK has no
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// catalogue of its own to check against, so that test is left out here. Only the version this
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// module's go.mod pins is what these tests run.
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//
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// A person may still point a run at a bus of their own — another release, a lab's — with
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// MESH_TEST_NATS_EXTERNAL=1 and MESH_TEST_NATS; then the run is theirs to serialise.
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package testbus
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import (
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"os"
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"sync"
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"testing"
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"time"
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"github.com/nats-io/nats-server/v2/server"
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)
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// Version is the release of the server the tests run.
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const Version = server.VERSION
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// URL is the bus of this test alone: started at its first ask, the same one at every ask after — a
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// test that dials twice, or hands the address to the code it tests, reaches one bus — and shut down
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// when the test ends.
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func URL(t testing.TB) string {
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t.Helper()
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if os.Getenv("MESH_TEST_NATS_EXTERNAL") == "1" {
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if url := os.Getenv("MESH_TEST_NATS"); url != "" {
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return url
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}
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t.Fatal("MESH_TEST_NATS_EXTERNAL=1 and MESH_TEST_NATS names no bus")
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}
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if url, ok := buses.Load(t); ok {
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return url.(string)
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}
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url := Start(t).ClientURL()
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buses.Store(t, url)
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t.Cleanup(func() { buses.Delete(t) })
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return url
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}
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// buses are the running tests' buses, by test.
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var buses sync.Map
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// Start is a server with JetStream, for this test alone: on loopback, on a port the system chooses, its
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// store in the test's own directory.
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func Start(t testing.TB) *server.Server {
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t.Helper()
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opts := &server.Options{Host: "127.0.0.1", Port: server.RANDOM_PORT, JetStream: true, StoreDir: t.TempDir(),
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NoLog: true, NoSigs: true}
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s, err := server.NewServer(opts)
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if err != nil {
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t.Fatalf("a bus for this test could not be made: %v", err)
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}
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go s.Start()
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if !s.ReadyForConnections(30 * time.Second) {
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s.Shutdown()
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t.Fatal("a bus for this test did not come up within 30s")
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}
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t.Cleanup(func() {
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s.Shutdown()
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s.WaitForShutdown()
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})
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return s
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}
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