Fix context provider detection without private fields

src/adapter/11/bindings.test.ts

@@ -0,0 +1,24 @@
+import { expect } from "vitest";
+import {
+	getDisplayName,
+	getPropsVNodeDisplayName,
+	TYPE_FUNCTION,
+} from "./bindings";
+
+describe("Preact 11 bindings", () => {
+	it("should detect context providers without a private back-reference", () => {
+		const context: any = Object.assign(() => null, {
+			displayName: "Foobar",
+			__: "default value",
+		});
+		context.Provider = context;
+
+		const config = { Fragment: () => null };
+		expect(
+			getPropsVNodeDisplayName({ type: context, props: {} } as any, config),
+		).to.equal("Foobar.Provider");
+		expect(
+			getDisplayName({ type: context, flags: TYPE_FUNCTION } as any, config),
+		).to.equal("Foobar.Provider");
+	});
+});

src/adapter/11/bindings.ts

@@ -94,6 +94,10 @@ export function getSuspenseStateKey(c: Component) {
 	return null;
 }
 
+function getContextProvider(type: any) {
+	return type.Provider === type ? type : type._contextRef || type.__;
+}
+
 // Mangle accessors
 
 // When serializing props we're dealing with vnodes instead of
@@ -112,7 +116,7 @@ export function getPropsVNodeDisplayName(vnode: VNode, config: RendererConfig) {
 		}
 
 		// Provider
-		const ctx = (type as any)._contextRef || (type as any).__;
+		const ctx = getContextProvider(type);
 		if (ctx && ctx.displayName) {
 			return `${ctx.displayName}.Provider`;
 		}
@@ -148,7 +152,7 @@ export function getDisplayName(internal: Internal, config: RendererConfig) {
 		}
 
 		// Provider
-		const ctx = (type as any)._contextRef || (type as any).__;
+		const ctx = getContextProvider(type);
 		if (ctx && ctx.displayName) {
 			return `${ctx.displayName}.Provider`;
 		}