CodeBuild execution continues after build fails instead of stopping

I'm building a CI/CD pipeline using git, codebuild and elastic beanstalk.

During codebuild execution when build fails due to syntax error of a test case, I see codebuild progress to next stage and ultimately go on to produce the artifacts.

My understanding was if the build fails, execution should stop. is this a correct behavior ?

Please see the buildspec below.

    version: 0.2

    phases:
      install:
        commands:
          - echo Installing package.json..
          - npm install
          - echo Installing Mocha...
          - npm install -g mocha
      pre_build:
        commands:
          - echo Installing source NPM placeholder dependencies...
      build:
        commands:
          - echo Build started on `date`
          - echo Compiling the Node.js code
          - mocha modules/**/tests/*.js
      post_build:
        commands:
          - echo Build completed on `date`
    artifacts:
      files:
        - modules/*
        - node_modules/*
        - package.json
        - config/*
        - server.js

CodeBuild detects build failures by exit codes. You should ensure that your test execution returns a non-zero exit code on failure.

POST_BUILD will always run as long as BUILD was also run (regardless of BUILD's success or failure.) The same goes for UPLOAD_ARTIFACTS. This is so you can retrieve debug information/artifacts.

If you want to do something different in POST_BUILD depending on the success or failure of BUILD, you can test the builtin environment variable CODEBUILD_BUILD_SUCCEEDING, which is set to 1 if BUILD succeeded, and 0 if it failed.