Copy the node-engine's declaration parser into mesh-sdk, from mesh-host main (issue 1353)

go/declaration/schedule_declaration_test.go

@@ -0,0 +1,53 @@
+package declaration
+
+import (
+	"strings"
+	"testing"
+)
+
+// The host refuses a schedule it does not fully understand, on arrival, for the same reason the
+// control plane refuses it near its author (novox/hq ADR 0053): a declaration half-understood is
+// refused whole rather than half-applied.
+
+func schedulePinned() string { return "registry.example/runtime@sha256:" + strings.Repeat("a", 64) }
+
+func TestAScheduledContainerCarriesTheCronField(t *testing.T) {
+	d, err := Parse([]byte(`{"declaration":1,"resources":[
+	  {"id":"sync","type":"container","name":"sync","image":"` + schedulePinned() + `","schedule":"0 3 * * *"}
+	]}`))
+	if err != nil {
+		t.Fatalf("a valid scheduled container was refused: %v", err)
+	}
+	c, ok := d.Resources[0].(*Container)
+	if !ok {
+		t.Fatalf("the scheduled resource is not a container: %T", d.Resources[0])
+	}
+	if c.Schedule != "0 3 * * *" {
+		t.Errorf("the schedule did not survive parsing: %q", c.Schedule)
+	}
+}
+
+func TestAMalformedScheduleIsRefused(t *testing.T) {
+	_, err := Parse([]byte(`{"declaration":1,"resources":[
+	  {"id":"sync","type":"container","name":"sync","image":"` + schedulePinned() + `","schedule":"every night"}
+	]}`))
+	if err == nil {
+		t.Fatal("a container with a malformed schedule was accepted")
+	}
+	if !strings.Contains(err.Error(), "cron") && !strings.Contains(err.Error(), "field") {
+		t.Errorf("refused for the wrong reason: %v", err)
+	}
+}
+
+func TestAContainerCannotBeBothRunOnceAndScheduled(t *testing.T) {
+	// A container runs once and gates, or on a cadence, or stays up — never two (novox/hq ADR 0053).
+	_, err := Parse([]byte(`{"declaration":1,"resources":[
+	  {"id":"sync","type":"container","name":"sync","image":"` + schedulePinned() + `","run-once":true,"schedule":"0 3 * * *"}
+	]}`))
+	if err == nil {
+		t.Fatal("a container that was both run-once and scheduled was accepted")
+	}
+	if !strings.Contains(err.Error(), "run-once") && !strings.Contains(err.Error(), "scheduled") {
+		t.Errorf("refused for the wrong reason: %v", err)
+	}
+}