[wrangler] Fix self-bindings showing as not connected in dev (#10915)

* fix: self-bindings show as connected in wrangler dev

Fixes #8970

Self-bindings (service bindings where a worker binds to itself) were
incorrectly showing as [not connected] in wrangler dev. This change
detects self-bindings by comparing the service name to the worker name
and always marks them as connected, since a worker is inherently
connected to itself.

- Modified print-bindings.ts to check for self-bindings before registry lookup
- Added test for self-bindings showing as [connected]
- Manually verified with workers-with-assets fixture

Co-Authored-By: smacleod@cloudflare.com <smacleod@cloudflare.com>

* fix: correct test snapshot for self-bindings table formatting

The table column widths are dynamically calculated based on content
length. The self-bindings test has longer binding names than other
service binding tests, which causes wider column spacing in the output.
Updated the snapshot to match the actual table formatting.

Co-Authored-By: smacleod@cloudflare.com <smacleod@cloudflare.com>

---------

Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>
Co-authored-by: smacleod@cloudflare.com <smacleod@cloudflare.com>

Author: devin-ai-integration[bot]

.changeset/ninety-times-sniff.md

@@ -0,0 +1,5 @@
+---
+"wrangler": patch
+---
+
+Fixed self-bindings (service bindings to the same worker) showing as [not connected] in wrangler dev. Self-bindings now correctly show as [connected] since a worker is always available to itself.

packages/wrangler/src/__tests__/dev.test.ts

@@ -2025,6 +2025,34 @@ describe.sequential("wrangler dev", () => {
 			`);
 			expect(std.warn).toMatchInlineSnapshot(`""`);
 		});
+
+		it("should show self-bindings as connected", async () => {
+			writeWranglerConfig({
+				name: "my-worker",
+				services: [
+					{ binding: "SELF", service: "my-worker" },
+					{
+						binding: "NAMED",
+						service: "my-worker",
+						entrypoint: "MyEntrypoint",
+					},
+				],
+			});
+			fs.writeFileSync("index.js", `export default {};`);
+			await runWranglerUntilConfig("dev index.js");
+			expect(std.out).toMatchInlineSnapshot(`
+				"
+				 ⛅️ wrangler x.x.x
+				──────────────────
+				Your Worker has access to the following bindings:
+				Binding                                 Resource      Mode
+				env.SELF (my-worker)                    Worker        local [connected]
+				env.NAMED (my-worker#MyEntrypoint)      Worker        local [connected]
+
+				"
+			`);
+			expect(std.warn).toMatchInlineSnapshot(`""`);
+		});
 	});
 
 	describe("print bindings", () => {

packages/wrangler/src/utils/print-bindings.ts

@@ -391,17 +391,24 @@ export function printBindings(
 				if (remote) {
 					mode = getMode({ isSimulatedLocally: false });
 				} else if (context.local && context.registry !== null) {
-					const registryDefinition = context.registry?.[service];
-					hasConnectionStatus = true;
-
-					if (
-						registryDefinition &&
-						(!entrypoint ||
-							registryDefinition.entrypointAddresses?.[entrypoint])
-					) {
+					const isSelfBinding = service === context.name;
+
+					if (isSelfBinding) {
+						hasConnectionStatus = true;
 						mode = getMode({ isSimulatedLocally: true, connected: true });
 					} else {
-						mode = getMode({ isSimulatedLocally: true, connected: false });
+						const registryDefinition = context.registry?.[service];
+						hasConnectionStatus = true;
+
+						if (
+							registryDefinition &&
+							(!entrypoint ||
+								registryDefinition.entrypointAddresses?.[entrypoint])
+						) {
+							mode = getMode({ isSimulatedLocally: true, connected: true });
+						} else {
+							mode = getMode({ isSimulatedLocally: true, connected: false });
+						}
 					}
 				}