# Copyright (c) Microsoft Corporation.
# Licensed under the MIT License.

# Constructed Collections Test Suite
# Validates ArrayCreate and SetCreate behavior including undefined handling.

cases:
  - note: array_create_basic
    description: ArrayCreate assembles elements from registers
    literals:
      - 1
      - 2
    instruction_params:
      array_create_params:
        - dest: 3
          elements: [0, 1, 2]
    instructions:
      - "Load { dest: 0, literal_idx: 0 }"
      - "Load { dest: 1, literal_idx: 1 }"
      - "Add { dest: 2, left: 0, right: 1 }"
      - "ArrayCreate { params_index: 0 }"
      - "Return { value: 3 }"
    want_result:
      - 1
      - 2
      - 3

  - note: array_create_with_undefined
    description: ArrayCreate returns undefined if any source is undefined
    literals:
      - 1
      - {}
      - "missing"
    instruction_params:
      array_create_params:
        - dest: 2
          elements: [0, 1]
    instructions:
      - "Load { dest: 0, literal_idx: 0 }"
      - "Load { dest: 3, literal_idx: 1 }"
      - "Load { dest: 4, literal_idx: 2 }"
      - "Index { dest: 1, container: 3, key: 4 }"
      - "ArrayCreate { params_index: 0 }"
      - "Return { value: 2 }"
    want_result: "#undefined"

  - note: set_create_basic
    description: SetCreate deduplicates values and collects registers
    literals:
      - 1
      - 2
    instruction_params:
      set_create_params:
        - dest: 3
          elements: [0, 1, 2]
    instructions:
      - "Load { dest: 0, literal_idx: 0 }"
      - "Load { dest: 1, literal_idx: 1 }"
      - "Load { dest: 2, literal_idx: 0 }"
      - "SetCreate { params_index: 0 }"
      - "Return { value: 3 }"
    want_result:
      set!: [1, 2]

  - note: set_create_with_undefined
    description: SetCreate returns undefined if any source register is undefined
    literals:
      - {}
      - "missing"
    instruction_params:
      set_create_params:
        - dest: 3
          elements: [0]
    instructions:
      - "Load { dest: 1, literal_idx: 0 }"
      - "Load { dest: 2, literal_idx: 1 }"
      - "Index { dest: 0, container: 1, key: 2 }"
      - "SetCreate { params_index: 0 }"
      - "Return { value: 3 }"
    want_result: "#undefined"