Feature: Dataset Selection and Filtering
  As a data engineer
  I want to select specific datasets or categories to process
  So that I can control which datasets are uploaded

  Scenario: List all datasets
    When I run upload script with "--list"
    Then the script should succeed
    And the output should list available datasets

  Scenario: Select single dataset by name
    When I run upload script with "--dataset wordnet --list"
    Then the output should contain "wordnet"
    And the output should show 1 dataset

  Scenario: Select multiple datasets by name
    When I run upload script with "--dataset wordnet --dataset yago-4.5 --list"
    Then the output should contain "wordnet"
    And the output should contain "yago-4.5"
    And the output should show 2 datasets

  Scenario: Select datasets by category small
    When I run upload script with "--category small --list"
    Then the output should list only small datasets

  Scenario: Select datasets by category medium
    When I run upload script with "--category medium --list"
    Then the output should list only medium datasets

  Scenario: Select all datasets
    When I run upload script with "--category all --list"
    Then the output should list all registered datasets

  Scenario: Filter unavailable datasets
    When I run upload script with "--list"
    Then unavailable datasets should be marked clearly

  Scenario: No datasets specified shows help
    When I run upload script with no arguments
    Then the script should show help message
    And exit with code 1