Deployment test: TypeScriptJavaScriptHostingDeploymentTests fails early with ERR exit code (sequence 10)

[mitchdenny]

Test

Aspire.Deployment.EndToEnd.Tests.TypeScriptJavaScriptHostingDeploymentTests

Symptom

CLI exits with a non-zero exit code very early in the TypeScript apphost flow:

Xunit.MicrosoftTestingPlatform.XunitException: System.InvalidOperationException : Command failed with non-zero exit code (detected ERR prompt at sequence 10). Check the terminal recording for details.

The total runtime before failure is ~52 seconds, and the failure occurs at hex1b sequence 10 — before any Azure resource group has been created (cleanup logs Resource group 'e2e-ts-js-hosting-26348648275-1' could not be found).

Root cause analysis

The TS apphost flow fails very early (sequence 10), suggesting a problem in template hydration, npm install, or one of the first aspire invocations against an apphost.ts. The recorded terminal capture from the failing run will show which command produced the ERR prompt — needs investigation.

Reproduction

• Scheduled Deployment Tests runs on main: consistently failing on the last 5 nightly runs.
• Also reproduced on PR Fix WithIngressClass parameter resolution for Kubernetes publish #17423 deployment-test run #26348648275 (unrelated to PR change).

Sibling failures pointing at TS apphost infra:

• Deployment test: TypeScriptAzureContainerAppJobDeploymentTests hangs waiting for success prompt #17436 — TypeScriptAzureContainerAppJobDeploymentTests
• Deployment test: AksAzureKubernetesEnvironmentCertManagerTypeScriptDeploymentTests cannot find apphost.ts #17438 — AksAzureKubernetesEnvironmentCertManagerTypeScriptDeploymentTests

Priority

High — blocks TS JavaScript hosting E2E coverage every nightly run.

/cc @mitchdenny