I have a two-stage CI flow which will build code automatically and run the unit test.

The first stage works well but I got an error in stage two.

Any hint for this?

Suppose the container remains exist in the second stage, and it can access cloned branch and built files there.

stages:
- build
- test

build-code:
  stage: build
  tags:
    - docker
  script:
    - echo "Current working directory:"
    - pwd
    - cd cpp
    - mkdir -p build
    - cd build
    - cmake ..
    - make -j12
  cache:
    paths:
      - cpp/build

run-unittest:
  stage: test
  tags:
    - docker
  script:
    - git clone https://github.com/google/googletest/
    - cd googletest
    - mkdir build
    - cd build
    - cmake ..
    - make -j12
    - sudo make install 
    - ls