Azure Pipelines - Run a stage multiple times

I am working with azure pipelines and I have some stages with jobs inside it.

I am trying to figure it out how can I run a stage 3 times before moving to next stage.

stages:
- stage: SomeTests
  jobs:
  - job:
    ...

- stage: Installation 
  dependsOn: SomeTests
  jobs:
  - job:
    ...

I'd like to run stage SomeTests 3 times and then run stage Installation.

How can I do that?

You can declare a parameter of type object containing an array (where each element contains information about the stage to run) and then loop through the parameter and generate a stage for each element.

Generating stages that run sequentially

By default stages run sequentially, but if you need to define custom dependencies you can do the following:

parameters:
  - name: testStages
    type: object
    default:
      - name: someTests1
        displayName: 'Some Tests 1'
        dependsOn: [] # run in parallel (first stage)
      - name: someTests2
        displayName: 'Some Tests 2'
        dependsOn:
          - someTests1
      - name: someTests3
        displayName: 'Some Tests 3'
        dependsOn:
          - someTests1
          - someTests2

stages:
  - ${{ each stage in parameters.testStages }}:
    - stage: ${{ stage.name }}
      displayName: ${{ stage.displayName }}
      dependsOn: ${{ stage.dependsOn }}
      jobs:
        - job: job_${{ stage.name }}
          steps:
            - checkout: none
            - script: echo ${{ stage.name }}
  
  - stage: Installation
    displayName: Installation
    dependsOn: ${{ parameters.testStages.*.name }}
    jobs:
      - job: job_Installation
        steps:
          - checkout: none
          - script: echo Installation

Queuing a new pipeline - stages:

Stages sequence:

Generating stages that run in parallel

As an alternative, you can run the test stages in parallel by setting dependsOn: []:

parameters:
  - name: testStages
    type: object
    default:
      - name: someTests1
        displayName: 'Some Tests 1'
      - name: someTests2
        displayName: 'Some Tests 2'
      - name: someTests3
        displayName: 'Some Tests 3'

stages:
  - ${{ each stage in parameters.testStages }}:
    - stage: ${{ stage.name }}
      displayName: ${{ stage.displayName }}
      dependsOn: [] # <----------------------- run stages in parallel (no dependencies)
      jobs:
        - job: job_${{ stage.name }}
          steps:
            - checkout: none
            - script: echo ${{ stage.name }}
  
  - stage: Installation
    displayName: Installation
    dependsOn: ${{ parameters.testStages.*.name }}
    jobs:
      - job: job_Installation
        steps:
          - checkout: none
          - script: echo Installation

Queuing a new pipeline - stages:

Stages sequence:

Recommended reading

• Runtime parameters
• Parameter data types
• Filtered arrays