feat: 004/phase 1

internal/hubmodule/registry_test.go

@@ -0,0 +1,49 @@
+package hubmodule
+
+import "testing"
+
+func replaceRegistry(t *testing.T) func() {
+	t.Helper()
+	prev := globalRegistry
+	globalRegistry = newRegistry()
+	return func() { globalRegistry = prev }
+}
+
+func TestRegisterResolveAndList(t *testing.T) {
+	cleanup := replaceRegistry(t)
+	defer cleanup()
+
+	if err := Register(ModuleMetadata{Key: "beta", MigrationState: MigrationStateBeta}); err != nil {
+		t.Fatalf("register beta failed: %v", err)
+	}
+	if err := Register(ModuleMetadata{Key: "gamma", MigrationState: MigrationStateGA}); err != nil {
+		t.Fatalf("register gamma failed: %v", err)
+	}
+
+	if _, ok := Resolve("beta"); !ok {
+		t.Fatalf("expected beta to resolve")
+	}
+	if _, ok := Resolve("BETA"); !ok {
+		t.Fatalf("resolve should be case-insensitive")
+	}
+
+	list := List()
+	if len(list) != 2 {
+		t.Fatalf("list length mismatch: %d", len(list))
+	}
+	if list[0].Key != "beta" || list[1].Key != "gamma" {
+		t.Fatalf("unexpected order: %+v", list)
+	}
+}
+
+func TestRegisterDuplicateFails(t *testing.T) {
+	cleanup := replaceRegistry(t)
+	defer cleanup()
+
+	if err := Register(ModuleMetadata{Key: "legacy"}); err != nil {
+		t.Fatalf("first registration should succeed: %v", err)
+	}
+	if err := Register(ModuleMetadata{Key: "legacy"}); err == nil {
+		t.Fatalf("duplicate registration should fail")
+	}
+}