sdks/python/apache_beam/yaml/tests/flatten.yaml

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pipelines:
  # Simple Flatten with three inputs
  - pipeline:
      type: composite
      transforms:
        - type: Create
          name: CreateA
          config:
            elements:
              - {transaction_id: "T0012", product_name: "Headphones", category: "Electronics", price: 59.99}
              - {transaction_id: "T5034", product_name: "Leather Jacket", category: "Apparel", price: 109.99}
        - type: Create
          name: CreateB
          config:
            elements:
              - {transaction_id: "T0024", product_name: "Aluminum Mug", category: "Kitchen", price: 29.9}
        - type: Create
          name: CreateC
          config:
            elements:
              - {transaction_id: "T0104", product_name: "Headphones", category: "Electronics", price: 59.99}
              - {transaction_id: "T0302", product_name: "Monitor", category: "Electronics", price: 249.99}
        - type: Flatten
          input: [CreateA, CreateB, CreateC]
        - type: AssertEqual
          input: Flatten
          config:
            elements:
              - {transaction_id: "T0012", product_name: "Headphones", category: "Electronics", price: 59.99}
              - {transaction_id: "T5034", product_name: "Leather Jacket", category: "Apparel", price: 109.99}
              - {transaction_id: "T0024", product_name: "Aluminum Mug", category: "Kitchen", price: 29.9}
              - {transaction_id: "T0104", product_name: "Headphones", category: "Electronics", price: 59.99}
              - {transaction_id: "T0302", product_name: "Monitor", category: "Electronics", price: 249.99}

  # Simple Flatten with one input
  - pipeline:
      type: composite
      transforms:
        - type: Create
          name: CreateA
          config:
            elements:
              - {transaction_id: "T0012", product_name: "Headphones", category: "Electronics", price: 59.99}
              - {transaction_id: "T5034", product_name: "Leather Jacket", category: "Apparel", price: 109.99}
              - {transaction_id: "T0024", product_name: "Aluminum Mug", category: "Kitchen", price: 29.9}
        - type: Flatten
          input: CreateA
        - type: AssertEqual
          input: Flatten
          config:
            elements:
              - {transaction_id: "T0012", product_name: "Headphones", category: "Electronics", price: 59.99}
              - {transaction_id: "T5034", product_name: "Leather Jacket", category: "Apparel", price: 109.99}
              - {transaction_id: "T0024", product_name: "Aluminum Mug", category: "Kitchen", price: 29.9}

  # Simple Flatten with duplicates in each input
  - pipeline:
      type: composite
      transforms:
        - type: Create
          name: CreateA
          config:
            elements:
              - {transaction_id: "T0012", product_name: "Headphones", category: "Electronics", price: 59.99}
              - {transaction_id: "T0012", product_name: "Headphones", category: "Electronics", price: 59.99}
        - type: Create
          name: CreateB
          config:
            elements:
              - {transaction_id: "T5034", product_name: "Leather Jacket", category: "Apparel", price: 109.99}
              - {transaction_id: "T5034", product_name: "Leather Jacket", category: "Apparel", price: 109.99}
        - type: Flatten
          input: [CreateA, CreateB]
        - type: AssertEqual
          input: Flatten
          config:
            elements:
              - {transaction_id: "T0012", product_name: "Headphones", category: "Electronics", price: 59.99}
              - {transaction_id: "T0012", product_name: "Headphones", category: "Electronics", price: 59.99}
              - {transaction_id: "T5034", product_name: "Leather Jacket", category: "Apparel", price: 109.99}
              - {transaction_id: "T5034", product_name: "Leather Jacket", category: "Apparel", price: 109.99}

  # Simple Flatten with duplicates across inputs
  - pipeline:
      type: composite
      transforms:
        - type: Create
          name: CreateA
          config:
            elements:
              - {transaction_id: "T0012", product_name: "Headphones", category: "Electronics", price: 59.99}
              - {transaction_id: "T5034", product_name: "Leather Jacket", category: "Apparel", price: 109.99}
        - type: Create
          name: CreateB
          config:
            elements:
              - {transaction_id: "T5034", product_name: "Leather Jacket", category: "Apparel", price: 109.99}
              - {transaction_id: "T0012", product_name: "Headphones", category: "Electronics", price: 59.99}
        - type: Flatten
          input: [CreateA, CreateB]
        - type: AssertEqual
          input: Flatten
          config:
            elements:
              - {transaction_id: "T0012", product_name: "Headphones", category: "Electronics", price: 59.99}
              - {transaction_id: "T0012", product_name: "Headphones", category: "Electronics", price: 59.99}
              - {transaction_id: "T5034", product_name: "Leather Jacket", category: "Apparel", price: 109.99}
              - {transaction_id: "T5034", product_name: "Leather Jacket", category: "Apparel", price: 109.99}