test: tighten command capture helper assertions

src/commands/config-validation.test.ts

@@ -47,7 +47,6 @@ describe("requireValidConfigSnapshot", () => {
 
   function requireFirstLog(runtime: ReturnType<typeof createRuntime>): string {
     const [message] = runtime.log.mock.calls[0] ?? [];
-    expect(message).toBeDefined();
     if (message === undefined) {
       throw new Error("expected runtime log message");
     }

src/commands/configure.gateway.test.ts

@@ -84,7 +84,6 @@ async function runGatewayPrompt(params: {
 
   const result = await promptGatewayConfig(params.baseConfig ?? {}, makeRuntime());
   const [call] = mocks.buildGatewayAuthConfig.mock.calls[0] ?? [];
-  expect(call).toBeDefined();
   if (!call) {
     throw new Error("expected gateway auth config input");
   }

src/commands/health.test.ts

@@ -58,7 +58,6 @@ vi.mock("../gateway/call.js", () => ({
 
 function requireFirstRuntimeLog(): string {
   const [message] = runtime.log.mock.calls[0] ?? [];
-  expect(message).toBeDefined();
   if (message === undefined) {
     throw new Error("expected health command log output");
   }