.gitlab-ci.yml

---
stages: [build, test]

# Producer is NOT parallelized — using needs.parallel.matrix on it must error.
build-job:
  stage: build
  script:
    - echo "build"

test-job:
  stage: test
  needs:
    - job: build-job
      parallel:
        matrix:
          - NAME: foo
  script:
    - echo "test"

# Producer uses plain `parallel: <integer>` (no matrix) — selector still must error.
build-int:
  stage: build
  parallel: 3
  script:
    - echo "build-int $CI_NODE_INDEX/$CI_NODE_TOTAL"

test-plain-parallel:
  stage: test
  needs:
    - job: build-int
      parallel:
        matrix:
          - NAME: foo
  script:
    - echo "test-plain-parallel"

# Producer is parallel:matrix but the selector matches zero permutations.
build-foo:
  stage: build
  parallel:
    matrix:
      - NAME: [foo, bar]
  script:
    - echo "build-foo $NAME"

test-zero-match:
  stage: test
  needs:
    - job: build-foo
      parallel:
        matrix:
          - NAME: nope
  script:
    - echo "test-zero-match"