---
- # Basic test cases on nested Hashes and Arrays
  name: "simple cases with nested Hashes and Arrays"
  original:
    tags:
      - "a"
      - "b"
      - "c"
    pos:
      x: "1"
      y: "2"
    some_str: "bla"
    some_int: 1
    some_bool: false
    extra_removed: "bye"
  modified:
    tags:
      - "b"
      - "c"
      - "d"
    pos:
      x: "3"
      y: "2"
    some_str: "bla"
    some_int: 2
    some_bool: true
    extra_added: "hi"
  expected_removed:
    tags:
      - "a"
    pos:
      x: "1"
    some_int: 1
    some_bool: false
    extra_removed: "bye"
  expected_added:
    tags:
      - "d"
    pos:
      x: "3"
    some_int: 2
    some_bool: true
    extra_added: "hi"

- # Test case where Arrays have duplicate values
  name: "Arrays with duplicate values"
  original:
    key:
      - 1
      - 1
      - 1
      - 2
      - 3
      - 4
  modified:
    key:
      - 1
      - 3
      - 4
      - 4
  expected_removed:
    key:
      - 1
      - 1
      - 2
  expected_added:
    key:
      - 4

- # Test case where nil values of Hashes are expected to be preserved
  name: "Hashes with nil values"
  original:
    old_nil: ~
    new_nil: "foo"
    still_nil: ~
    removed_nil: ~
  modified:
    old_nil: "bar"
    new_nil: ~
    still_nil: ~
    added_nil: ~
  expected_removed:
    old_nil: ~
    new_nil: "foo"
    removed_nil: ~
  expected_added:
    old_nil: "bar"
    new_nil: ~
    added_nil: ~

- # Test case where an empty Hash is compared to a Hash with one nil
  # value in it.
  name: "an empty Hash being compared to a Hash with a nil value"
  original: {}
  modified:
    key: ~
  expected_removed: {}
  expected_added:
    key: ~

- # Test case where nil values of Arrays are expected to be preserved
  name: "Arrays with nil values"
  original:
    key:
      - 5
      - "hi"
  modified:
    key:
      - 5
      - "hi"
      - ~
  expected_removed:
    key: []
  expected_added:
    key:
      - ~

- # Test case where an empty Array is compared to an Array with one
  # nil value in it.
  name: "an empty Array being compared to an Array with a nil value"
  original:
    key: []
  modified:
    key:
      - ~
  expected_removed:
    key: []
  expected_added:
    key:
      - ~

- # Test case where nested Hashes and Arrays that are identical are
  # expected to not show up as empty Hashes and Arrays in diffs.
  name: "matching nested Hashes and Arrays"
  original:
    hash:
      foo: "bar"
    array:
      - 1
      - 2
      - 3
    extra: "apples"
  modified:
    hash:
      foo: "bar"
    array:
      - 1
      - 2
      - 3
    extra: "oranges"
  expected_removed:
    extra: "apples"
  expected_added:
    extra: "oranges"

- # Test case where empty Hashes and Arrays that are added or removed
  # are expected to show up in diffs.
  name: "empty Hashes and Arrays"
  original:
    foo: "bar"
  modified:
    empty_hash: {}
    empty_array: []
    foo: "bar"
  expected_removed: {}
  expected_added:
    empty_hash: {}
    empty_array: []

-
  name: "empty Strings"
  original:
    possibly_empty_string: ""
  modified:
    possibly_empty_string: "not empty"
  expected_removed:
    possibly_empty_string: ""
  expected_added:
    possibly_empty_string: "not empty"

- # Test case where Arrays containing Hashes are expected to not
  # cause an error.
  name: "Arrays containing Hashes"
  original:
    key:
      -
        c: "1"
      -
        a: "2"
      -
        a: "1"
  modified:
    key:
      -
        c: "1"
      -
        b: "2"
      -
        a: "1"
  expected_removed:
    key:
      -
        a: "2"
  expected_added:
    key:
      -
        b: "2"

- # Test case where Arrays containing Hashes with nils are expected
  # to not cause an error.
  name: "Arrays containing Hashes with nils"
  original:
    key:
      -
        a: "1"
        b: "2"
      -
        a: ~
        c: "2"
      -
        e: "5"
  modified:
    key:
      -
        a: "1"
        b: "2"
      -
        a: ~
        c: "2"
      -
        d: "4"
  expected_removed:
    key:
      -
        e: "5"
  expected_added:
    key:
      -
        d: "4"