fix(testing): normalize QA compose service lookup

src/plugin-sdk/qa-runtime.test.ts

@@ -298,6 +298,49 @@ describe("plugin-sdk qa-runtime", () => {
     expect(sleepImpl).toHaveBeenCalledTimes(1);
   });
 
+  it("normalizes multiline Docker compose service lookup output", async () => {
+    const module = await import("./qa-runtime.js");
+    const runtime = module.createQaDockerRuntime({ auditContext: "qa-test" });
+    const runCommand = vi.fn(async (command: string, args: string[], cwd: string) => {
+      expect(command).toBe("docker");
+      expect(cwd).toBe("/repo");
+
+      if (args.includes("ps") && args.includes("-q")) {
+        return {
+          stdout: "\nqa-gateway-one\nqa-gateway-two\n",
+          stderr: "",
+        };
+      }
+
+      if (args[0] === "inspect") {
+        expect(args.at(-1)).toBe("qa-gateway-one");
+        return {
+          stdout: "\n172.18.0.4\n172.19.0.4\n",
+          stderr: "",
+        };
+      }
+
+      throw new Error(`unexpected docker args: ${args.join(" ")}`);
+    });
+    const fetchImpl = vi.fn(async (url: string) => ({
+      ok: url === "http://172.18.0.4:18789/healthz",
+    }));
+
+    await expect(
+      runtime.resolveComposeServiceUrl(
+        "gateway",
+        18789,
+        "/tmp/docker-compose.yml",
+        "/repo",
+        runCommand,
+        fetchImpl,
+      ),
+    ).resolves.toBe("http://172.18.0.4:18789/");
+
+    expect(runCommand).toHaveBeenCalledTimes(2);
+    expect(fetchImpl).toHaveBeenCalledWith("http://172.18.0.4:18789/healthz");
+  });
+
   it("resolves an unpinned QA Docker host port away from an occupied loopback default", async () => {
     const module = await import("./qa-runtime.js");
     const reservation = await occupyLoopbackPort();

src/plugin-sdk/qa-runtime.ts

@@ -458,6 +458,10 @@ function normalizeDockerServiceStatus(row?: { Health?: string; State?: string })
   return "unknown";
 }
 
+function firstDockerOutputLine(stdout: string) {
+  return normalizeStringEntries(stdout.split("\n"))[0] ?? "";
+}
+
 function parseDockerComposePsRows(stdout: string) {
   const trimmed = stdout.trim();
   if (!trimmed) {
@@ -620,7 +624,7 @@ export function createQaDockerRuntime(params: {
       ["compose", "-f", composeFile, "ps", "-q", service],
       repoRoot,
     );
-    const containerId = containerStdout.trim();
+    const containerId = firstDockerOutputLine(containerStdout);
     if (!containerId) {
       return null;
     }
@@ -629,12 +633,12 @@ export function createQaDockerRuntime(params: {
       [
         "inspect",
         "--format",
-        "{{range .NetworkSettings.Networks}}{{.IPAddress}}{{end}}",
+        "{{range .NetworkSettings.Networks}}{{println .IPAddress}}{{end}}",
         containerId,
       ],
       repoRoot,
     );
-    const ip = ipStdout.trim();
+    const ip = firstDockerOutputLine(ipStdout);
     if (!ip) {
       return null;
     }