refactor(api): extract everyTick helper for reconciler goroutines

api/main_test.go

@@ -1,92 +0,0 @@
-package main
-
-import (
-	"context"
-	"testing"
-	"time"
-)
-
-// TestEveryTick_CallsFnOnTick verifies the helper invokes fn repeatedly on its
-// interval. A non-blocking send keeps the spawned goroutine from ever blocking
-// on a full channel, and the 1s timeout per tick is generous vs the 1ms
-// interval so the test is not timing-flaky.
-func TestEveryTick_CallsFnOnTick(t *testing.T) {
-	ctx := t.Context()
-
-	fired := make(chan struct{}, 1)
-	everyTick(ctx, time.Millisecond, func(context.Context) {
-		select {
-		case fired <- struct{}{}:
-		default:
-		}
-	})
-
-	for i := range 3 {
-		select {
-		case <-fired:
-		case <-time.After(time.Second):
-			t.Fatalf("tick %d did not fire within 1s", i+1)
-		}
-	}
-}
-
-// TestEveryTick_StopsOnContextCancel verifies cancelling ctx stops the loop.
-// After the first tick we cancel inside the inter-tick gap, so everyTick's
-// select sees only ctx.Done ready (ticker.C is cold) and returns
-// deterministically — there is no random pick between two ready cases. We then
-// confirm no further tick arrives within a full interval, which a live loop
-// could not satisfy. This is the shutdown guarantee the reconcilers depend on.
-func TestEveryTick_StopsOnContextCancel(t *testing.T) {
-	ctx, cancel := context.WithCancel(context.Background())
-
-	const interval = 50 * time.Millisecond
-	ticks := make(chan struct{}) // unbuffered: fn blocks until the test receives
-	everyTick(ctx, interval, func(context.Context) {
-		ticks <- struct{}{}
-	})
-
-	// First tick proves the loop is running and leaves the goroutine back in
-	// select with ticker.C cold for the next ~interval.
-	select {
-	case <-ticks:
-	case <-time.After(time.Second):
-		t.Fatal("everyTick never called fn")
-	}
-
-	cancel()
-
-	// Cancel landed in the cold gap, so the loop must have taken ctx.Done and
-	// returned. A live loop would tick again at ~interval; a stopped one never
-	// will.
-	select {
-	case <-ticks:
-		t.Fatal("everyTick ticked again after cancel")
-	case <-time.After(interval + 50*time.Millisecond):
-		// good: silent past a full interval — the loop returned
-	}
-}
-
-func TestEveryTick_PassesContextToFn(t *testing.T) {
-	type ctxKey string
-	const marker ctxKey = "marker"
-	ctx, cancel := context.WithCancel(context.WithValue(context.Background(), marker, "present"))
-	defer cancel()
-
-	got := make(chan string, 1)
-	everyTick(ctx, time.Millisecond, func(c context.Context) {
-		v, _ := c.Value(marker).(string)
-		select {
-		case got <- v:
-		default:
-		}
-	})
-
-	select {
-	case v := <-got:
-		if v != "present" {
-			t.Fatalf("fn received wrong context: value = %q, want %q", v, "present")
-		}
-	case <-time.After(time.Second):
-		t.Fatalf("fn never ran")
-	}
-}