Class: TestDeepMerge

Inherits:

Test::Unit::TestCase

• Object
• Test::Unit::TestCase
• TestDeepMerge

Defined in:

lib/puppet/vendor/deep_merge/test/test_deep_merge.rb

Constant Summary

FIELD_KNOCKOUT_PREFIX =

DeepMerge::DEFAULT_FIELD_KNOCKOUT_PREFIX

Instance Method Summary

• #setup ⇒ Object
• #test_deep_merge ⇒ Object

  tests DeepMerge::deep_merge! function.

• #test_hash_deep_merge ⇒ Object

  show that Hash object has deep merge capabilities in form of three methods: ko_deep_merge! # uses ‘–’ knockout and overwrites unmergeable deep_merge! # overwrites unmergeable deep_merge # skips unmergeable.

Instance Method Details

#setup ⇒ Object

# File 'lib/puppet/vendor/deep_merge/test/test_deep_merge.rb', line 16

def setup
end

#test_deep_merge ⇒ Object

tests DeepMerge::deep_merge! function

# File 'lib/puppet/vendor/deep_merge/test/test_deep_merge.rb', line 45

def test_deep_merge
  # merge tests (moving from basic to more complex)

  # test merging an hash w/array into blank hash
  hash_src = {'id' => '2'}
  hash_dst = {}
  DeepMerge::deep_merge!(hash_src.dup, hash_dst, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal hash_src, hash_dst

  # test merging an hash w/array into blank hash
  hash_src = {'region' => {'id' => ['227', '2']}}
  hash_dst = {}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal hash_src, hash_dst

  # merge from empty hash
  hash_src = {}
  hash_dst = {"property" => ["2","4"]}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"property" => ["2","4"]}, hash_dst)

  # merge to empty hash
  hash_src = {"property" => ["2","4"]}
  hash_dst = {}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"property" => ["2","4"]}, hash_dst)

  # simple string overwrite
  hash_src = {"name" => "value"}
  hash_dst = {"name" => "value1"}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"name" => "value"}, hash_dst)

  # simple string overwrite of empty hash
  hash_src = {"name" => "value"}
  hash_dst = {}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal(hash_src, hash_dst)

  # hashes holding array
  hash_src = {"property" => ["1","3"]}
  hash_dst = {"property" => ["2","4"]}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal(["2","4","1","3"], hash_dst['property'])

  # hashes holding array (sorted)
  hash_src = {"property" => ["1","3"]}
  hash_dst = {"property" => ["2","4"]}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:sort_merged_arrays => true})
  assert_equal(["1","2","3","4"].sort, hash_dst['property'])

  # hashes holding hashes holding arrays (array with duplicate elements is merged with dest then src
  hash_src = {"property" => {"bedroom_count" => ["1", "2"], "bathroom_count" => ["1", "4+"]}}
  hash_dst = {"property" => {"bedroom_count" => ["3", "2"], "bathroom_count" => ["2"]}}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"property" => {"bedroom_count" => ["3","2","1"], "bathroom_count" => ["2", "1", "4+"]}}, hash_dst)

  # hash holding hash holding array v string (string is overwritten by array)
  hash_src = {"property" => {"bedroom_count" => ["1", "2"], "bathroom_count" => ["1", "4+"]}}
  hash_dst = {"property" => {"bedroom_count" => "3", "bathroom_count" => ["2"]}}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"property" => {"bedroom_count" => ["1", "2"], "bathroom_count" => ["2","1","4+"]}}, hash_dst)

  # hash holding hash holding array v string (string is NOT overwritten by array)
  hash_src = {"property" => {"bedroom_count" => ["1", "2"], "bathroom_count" => ["1", "4+"]}}
  hash_dst = {"property" => {"bedroom_count" => "3", "bathroom_count" => ["2"]}}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:preserve_unmergeables => true})
  assert_equal({"property" => {"bedroom_count" => "3", "bathroom_count" => ["2","1","4+"]}}, hash_dst)

  # hash holding hash holding string v array (array is overwritten by string)
  hash_src = {"property" => {"bedroom_count" => "3", "bathroom_count" => ["1", "4+"]}}
  hash_dst = {"property" => {"bedroom_count" => ["1", "2"], "bathroom_count" => ["2"]}}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"property" => {"bedroom_count" => "3", "bathroom_count" => ["2","1","4+"]}}, hash_dst)

  # hash holding hash holding string v array (array does NOT overwrite string)
  hash_src = {"property" => {"bedroom_count" => "3", "bathroom_count" => ["1", "4+"]}}
  hash_dst = {"property" => {"bedroom_count" => ["1", "2"], "bathroom_count" => ["2"]}}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:preserve_unmergeables => true})
  assert_equal({"property" => {"bedroom_count" => ["1", "2"], "bathroom_count" => ["2","1","4+"]}}, hash_dst)

  # hash holding hash holding hash v array (array is overwritten by hash)
  hash_src = {"property" => {"bedroom_count" => {"king_bed" => 3, "queen_bed" => 1}, "bathroom_count" => ["1", "4+"]}}
  hash_dst = {"property" => {"bedroom_count" => ["1", "2"], "bathroom_count" => ["2"]}}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"property" => {"bedroom_count" => {"king_bed" => 3, "queen_bed" => 1}, "bathroom_count" => ["2","1","4+"]}}, hash_dst)

  # hash holding hash holding hash v array (array is NOT overwritten by hash)
  hash_src = {"property" => {"bedroom_count" => {"king_bed" => 3, "queen_bed" => 1}, "bathroom_count" => ["1", "4+"]}}
  hash_dst = {"property" => {"bedroom_count" => ["1", "2"], "bathroom_count" => ["2"]}}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:preserve_unmergeables => true})
  assert_equal({"property" => {"bedroom_count" => ["1", "2"], "bathroom_count" => ["2","1","4+"]}}, hash_dst)

  # 3 hash layers holding integers (integers are overwritten by source)
  hash_src = {"property" => {"bedroom_count" => {"king_bed" => 3, "queen_bed" => 1}, "bathroom_count" => ["1", "4+"]}}
  hash_dst = {"property" => {"bedroom_count" => {"king_bed" => 2, "queen_bed" => 4}, "bathroom_count" => ["2"]}}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"property" => {"bedroom_count" => {"king_bed" => 3, "queen_bed" => 1}, "bathroom_count" => ["2","1","4+"]}}, hash_dst)

  # 3 hash layers holding arrays of int (arrays are merged)
  hash_src = {"property" => {"bedroom_count" => {"king_bed" => [3], "queen_bed" => [1]}, "bathroom_count" => ["1", "4+"]}}
  hash_dst = {"property" => {"bedroom_count" => {"king_bed" => [2], "queen_bed" => [4]}, "bathroom_count" => ["2"]}}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"property" => {"bedroom_count" => {"king_bed" => [2,3], "queen_bed" => [4,1]}, "bathroom_count" => ["2","1","4+"]}}, hash_dst)

  # 1 hash overwriting 3 hash layers holding arrays of int
  hash_src = {"property" => "1"}
  hash_dst = {"property" => {"bedroom_count" => {"king_bed" => [2], "queen_bed" => [4]}, "bathroom_count" => ["2"]}}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"property" => "1"}, hash_dst)

  # 1 hash NOT overwriting 3 hash layers holding arrays of int
  hash_src = {"property" => "1"}
  hash_dst = {"property" => {"bedroom_count" => {"king_bed" => [2], "queen_bed" => [4]}, "bathroom_count" => ["2"]}}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:preserve_unmergeables => true})
  assert_equal({"property" => {"bedroom_count" => {"king_bed" => [2], "queen_bed" => [4]}, "bathroom_count" => ["2"]}}, hash_dst)

  # 3 hash layers holding arrays of int (arrays are merged) but second hash's array is overwritten
  hash_src = {"property" => {"bedroom_count" => {"king_bed" => [3], "queen_bed" => [1]}, "bathroom_count" => "1"}}
  hash_dst = {"property" => {"bedroom_count" => {"king_bed" => [2], "queen_bed" => [4]}, "bathroom_count" => ["2"]}}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"property" => {"bedroom_count" => {"king_bed" => [2,3], "queen_bed" => [4,1]}, "bathroom_count" => "1"}}, hash_dst)

  # 3 hash layers holding arrays of int (arrays are merged) but second hash's array is NOT overwritten
  hash_src = {"property" => {"bedroom_count" => {"king_bed" => [3], "queen_bed" => [1]}, "bathroom_count" => "1"}}
  hash_dst = {"property" => {"bedroom_count" => {"king_bed" => [2], "queen_bed" => [4]}, "bathroom_count" => ["2"]}}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:preserve_unmergeables => true})
  assert_equal({"property" => {"bedroom_count" => {"king_bed" => [2,3], "queen_bed" => [4,1]}, "bathroom_count" => ["2"]}}, hash_dst)

  # 3 hash layers holding arrays of int, but one holds int. This one overwrites, but the rest merge
  hash_src = {"property" => {"bedroom_count" => {"king_bed" => 3, "queen_bed" => [1]}, "bathroom_count" => ["1"]}}
  hash_dst = {"property" => {"bedroom_count" => {"king_bed" => [2], "queen_bed" => [4]}, "bathroom_count" => ["2"]}}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"property" => {"bedroom_count" => {"king_bed" => 3, "queen_bed" => [4,1]}, "bathroom_count" => ["2","1"]}}, hash_dst)

  # 3 hash layers holding arrays of int, but source is incomplete.
  hash_src = {"property" => {"bedroom_count" => {"king_bed" => [3]}, "bathroom_count" => ["1"]}}
  hash_dst = {"property" => {"bedroom_count" => {"king_bed" => [2], "queen_bed" => [4]}, "bathroom_count" => ["2"]}}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"property" => {"bedroom_count" => {"king_bed" => [2,3], "queen_bed" => [4]}, "bathroom_count" => ["2","1"]}}, hash_dst)

  # 3 hash layers holding arrays of int, but source is shorter and has new 2nd level ints.
  hash_src = {"property" => {"bedroom_count" => {2=>3, "king_bed" => [3]}, "bathroom_count" => ["1"]}}
  hash_dst = {"property" => {"bedroom_count" => {"king_bed" => [2], "queen_bed" => [4]}, "bathroom_count" => ["2"]}}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"property" => {"bedroom_count" => {2=>3, "king_bed" => [2,3], "queen_bed" => [4]}, "bathroom_count" => ["2","1"]}}, hash_dst)

  # 3 hash layers holding arrays of int, but source is empty
  hash_src = {}
  hash_dst = {"property" => {"bedroom_count" => {"king_bed" => [2], "queen_bed" => [4]}, "bathroom_count" => ["2"]}}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"property" => {"bedroom_count" => {"king_bed" => [2], "queen_bed" => [4]}, "bathroom_count" => ["2"]}}, hash_dst)

  # 3 hash layers holding arrays of int, but dest is empty
  hash_src = {"property" => {"bedroom_count" => {2=>3, "king_bed" => [3]}, "bathroom_count" => ["1"]}}
  hash_dst = {}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"property" => {"bedroom_count" => {2=>3, "king_bed" => [3]}, "bathroom_count" => ["1"]}}, hash_dst)

  # 3 hash layers holding arrays of int, but source includes a nil in the array
  hash_src = {"property" => {"bedroom_count" => {"king_bed" => [nil], "queen_bed" => [1, nil]}, "bathroom_count" => [nil, "1"]}}
  hash_dst = {"property" => {"bedroom_count" => {"king_bed" => [2], "queen_bed" => [4]}, "bathroom_count" => ["2"]}}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"property" => {"bedroom_count" => {"king_bed" => [2,nil], "queen_bed" => [4, 1, nil]}, "bathroom_count" => ["2", nil, "1"]}}, hash_dst)

  # 3 hash layers holding arrays of int, but destination includes a nil in the array
  hash_src = {"property" => {"bedroom_count" => {"king_bed" => [3], "queen_bed" => [1]}, "bathroom_count" => ["1"]}}
  hash_dst = {"property" => {"bedroom_count" => {"king_bed" => [nil], "queen_bed" => [4, nil]}, "bathroom_count" => [nil,"2"]}}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"property" => {"bedroom_count" => {"king_bed" => [nil, 3], "queen_bed" => [4, nil, 1]}, "bathroom_count" => [nil, "2", "1"]}}, hash_dst)

  # test parameter management for knockout_prefix and overwrite unmergeable
  assert_raise(DeepMerge::InvalidParameter) {DeepMerge::deep_merge!(hash_src, hash_dst, {:knockout_prefix => ""})}
  assert_raise(DeepMerge::InvalidParameter) {DeepMerge::deep_merge!(hash_src, hash_dst, {:preserve_unmergeables => true, :knockout_prefix => ""})}
  assert_raise(DeepMerge::InvalidParameter) {DeepMerge::deep_merge!(hash_src, hash_dst, {:preserve_unmergeables => true, :knockout_prefix => "--"})}
  assert_nothing_raised(DeepMerge::InvalidParameter) {DeepMerge::deep_merge!(hash_src, hash_dst, {:knockout_prefix => "--"})}
  assert_nothing_raised(DeepMerge::InvalidParameter) {DeepMerge::deep_merge!(hash_src, hash_dst)}
  assert_nothing_raised(DeepMerge::InvalidParameter) {DeepMerge::deep_merge!(hash_src, hash_dst, {:preserve_unmergeables => true})}

  # hash holding arrays of arrays
  hash_src = {["1", "2", "3"] => ["1", "2"]}
  hash_dst = {["4", "5"] => ["3"]}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({["1","2","3"] => ["1", "2"], ["4", "5"] => ["3"]}, hash_dst)

  # test merging of hash with blank hash, and make sure that source array split still functions
  hash_src = {'property' => {'bedroom_count' => ["1","2,3"]}}
  hash_dst = {}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({'property' => {'bedroom_count' => ["1","2","3"]}}, hash_dst)

  # test merging of hash with blank hash, and make sure that source array split does not function when turned off
  hash_src = {'property' => {'bedroom_count' => ["1","2,3"]}}
  hash_dst = {}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX})
  assert_equal({'property' => {'bedroom_count' => ["1","2,3"]}}, hash_dst)

  # test merging into a blank hash with overwrite_unmergeables turned on
  hash_src = {"action"=>"browse", "controller"=>"results"}
  hash_dst = {}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:overwrite_unmergeables => true, :knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal hash_src, hash_dst

  # KNOCKOUT_PREFIX testing
  # the next few tests are looking for correct behavior from specific real-world params/session merges
  # using the custom modifiers built for param/session merges

  [nil, ","].each do |ko_split|
    # typical params/session style hash with knockout_merge elements
    hash_params = {"property"=>{"bedroom_count"=>[FIELD_KNOCKOUT_PREFIX+"1", "2", "3"]}}
    hash_session = {"property"=>{"bedroom_count"=>["1", "2", "3"]}}
    DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ko_split})
    assert_equal({"property"=>{"bedroom_count"=>["2", "3"]}}, hash_session)

    # typical params/session style hash with knockout_merge elements
    hash_params = {"property"=>{"bedroom_count"=>[FIELD_KNOCKOUT_PREFIX+"1", "2", "3"]}}
    hash_session = {"property"=>{"bedroom_count"=>["3"]}}
    DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ko_split})
    assert_equal({"property"=>{"bedroom_count"=>["3","2"]}}, hash_session)

    # typical params/session style hash with knockout_merge elements
    hash_params = {"property"=>{"bedroom_count"=>[FIELD_KNOCKOUT_PREFIX+"1", "2", "3"]}}
    hash_session = {"property"=>{"bedroom_count"=>["4"]}}
    DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ko_split})
    assert_equal({"property"=>{"bedroom_count"=>["4","2","3"]}}, hash_session)

    # typical params/session style hash with knockout_merge elements
    hash_params = {"property"=>{"bedroom_count"=>[FIELD_KNOCKOUT_PREFIX+"1", "2", "3"]}}
    hash_session = {"property"=>{"bedroom_count"=>[FIELD_KNOCKOUT_PREFIX+"1", "4"]}}
    DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ko_split})
    assert_equal({"property"=>{"bedroom_count"=>["4","2","3"]}}, hash_session)

    # typical params/session style hash with knockout_merge elements
    hash_params = {"amenity"=>{"id"=>[FIELD_KNOCKOUT_PREFIX+"1", FIELD_KNOCKOUT_PREFIX+"2", "3", "4"]}}
    hash_session = {"amenity"=>{"id"=>["1", "2"]}}
    DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ko_split})
    assert_equal({"amenity"=>{"id"=>["3","4"]}}, hash_session)
  end

  # special params/session style hash with knockout_merge elements in form src: ["1","2"] dest:["--1,--2", "3,4"]
  hash_params = {"amenity"=>{"id"=>[FIELD_KNOCKOUT_PREFIX+"1,"+FIELD_KNOCKOUT_PREFIX+"2", "3,4"]}}
  hash_session = {"amenity"=>{"id"=>["1", "2"]}}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({"amenity"=>{"id"=>["3","4"]}}, hash_session)

  # same as previous but without ko_split value, this merge should fail
  hash_params = {"amenity"=>{"id"=>[FIELD_KNOCKOUT_PREFIX+"1,"+FIELD_KNOCKOUT_PREFIX+"2", "3,4"]}}
  hash_session = {"amenity"=>{"id"=>["1", "2"]}}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX})
  assert_equal({"amenity"=>{"id"=>["1","2","3,4"]}}, hash_session)

  # special params/session style hash with knockout_merge elements in form src: ["1","2"] dest:["--1,--2", "3,4"]
  hash_params = {"amenity"=>{"id"=>[FIELD_KNOCKOUT_PREFIX+"1,2", "3,4", "--5", "6"]}}
  hash_session = {"amenity"=>{"id"=>["1", "2"]}}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({"amenity"=>{"id"=>["2","3","4","6"]}}, hash_session)

  # special params/session style hash with knockout_merge elements in form src: ["--1,--2", "3,4", "--5", "6"] dest:["1,2", "3,4"]
  hash_params = {"amenity"=>{"id"=>["#{FIELD_KNOCKOUT_PREFIX}1,#{FIELD_KNOCKOUT_PREFIX}2", "3,4", "#{FIELD_KNOCKOUT_PREFIX}5", "6"]}}
  hash_session = {"amenity"=>{"id"=>["1", "2", "3", "4"]}}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({"amenity"=>{"id"=>["3","4","6"]}}, hash_session)


  hash_src = {"url_regions"=>[], "region"=>{"ids"=>["227,233"]}, "action"=>"browse", "task"=>"browse", "controller"=>"results"}
  hash_dst = {"region"=>{"ids"=>["227"]}}
  DeepMerge::deep_merge!(hash_src.dup, hash_dst, {:overwrite_unmergeables => true, :knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({"url_regions"=>[], "region"=>{"ids"=>["227","233"]}, "action"=>"browse", "task"=>"browse", "controller"=>"results"}, hash_dst)

  hash_src = {"region"=>{"ids"=>["--","227"], "id"=>"230"}}
  hash_dst = {"region"=>{"ids"=>["227", "233", "324", "230", "230"], "id"=>"230"}}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:overwrite_unmergeables => true, :knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({"region"=>{"ids"=>["227"], "id"=>"230"}}, hash_dst)

  hash_src = {"region"=>{"ids"=>["--","227", "232", "233"], "id"=>"232"}}
  hash_dst = {"region"=>{"ids"=>["227", "233", "324", "230", "230"], "id"=>"230"}}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:overwrite_unmergeables => true, :knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({"region"=>{"ids"=>["227", "232", "233"], "id"=>"232"}}, hash_dst)

  hash_src = {"region"=>{"ids"=>["--,227,232,233"], "id"=>"232"}}
  hash_dst = {"region"=>{"ids"=>["227", "233", "324", "230", "230"], "id"=>"230"}}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:overwrite_unmergeables => true, :knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({"region"=>{"ids"=>["227", "232", "233"], "id"=>"232"}}, hash_dst)

  hash_src = {"region"=>{"ids"=>["--,227,232","233"], "id"=>"232"}}
  hash_dst = {"region"=>{"ids"=>["227", "233", "324", "230", "230"], "id"=>"230"}}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:overwrite_unmergeables => true, :knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({"region"=>{"ids"=>["227", "232", "233"], "id"=>"232"}}, hash_dst)

  hash_src = {"region"=>{"ids"=>["--,227"], "id"=>"230"}}
  hash_dst = {"region"=>{"ids"=>["227", "233", "324", "230", "230"], "id"=>"230"}}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:overwrite_unmergeables => true, :knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({"region"=>{"ids"=>["227"], "id"=>"230"}}, hash_dst)

  hash_src = {"region"=>{"ids"=>["--,227"], "id"=>"230"}}
  hash_dst = {"region"=>{"ids"=>["227", "233", "324", "230", "230"], "id"=>"230"}, "action"=>"browse", "task"=>"browse", "controller"=>"results", "property_order_by"=>"property_type.descr"}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:overwrite_unmergeables => true, :knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({"region"=>{"ids"=>["227"], "id"=>"230"}, "action"=>"browse", "task"=>"browse",
    "controller"=>"results", "property_order_by"=>"property_type.descr"}, hash_dst)

  hash_src = {"query_uuid"=>"6386333d-389b-ab5c-8943-6f3a2aa914d7", "region"=>{"ids"=>["--,227"], "id"=>"230"}}
  hash_dst = {"query_uuid"=>"6386333d-389b-ab5c-8943-6f3a2aa914d7", "url_regions"=>[], "region"=>{"ids"=>["227", "233", "324", "230", "230"], "id"=>"230"}, "action"=>"browse", "task"=>"browse", "controller"=>"results", "property_order_by"=>"property_type.descr"}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:overwrite_unmergeables => true, :knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({"query_uuid" => "6386333d-389b-ab5c-8943-6f3a2aa914d7", "url_regions"=>[],
    "region"=>{"ids"=>["227"], "id"=>"230"}, "action"=>"browse", "task"=>"browse",
    "controller"=>"results", "property_order_by"=>"property_type.descr"}, hash_dst)

  # knock out entire dest hash if "--" is passed for source
  hash_params = {'amenity' => "--"}
  hash_session = {"amenity" => "1"}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => "--", :unpack_arrays => ","})
  assert_equal({'amenity' => ""}, hash_session)

  # knock out entire dest hash if "--" is passed for source
  hash_params = {'amenity' => ["--"]}
  hash_session = {"amenity" => "1"}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => "--", :unpack_arrays => ","})
  assert_equal({'amenity' => []}, hash_session)

  # knock out entire dest hash if "--" is passed for source
  hash_params = {'amenity' => "--"}
  hash_session = {"amenity" => ["1"]}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => "--", :unpack_arrays => ","})
  assert_equal({'amenity' => ""}, hash_session)

  # knock out entire dest hash if "--" is passed for source
  hash_params = {'amenity' => ["--"]}
  hash_session = {"amenity" => ["1"]}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => "--", :unpack_arrays => ","})
  assert_equal({'amenity' => []}, hash_session)

  # knock out entire dest hash if "--" is passed for source
  hash_params = {'amenity' => ["--"]}
  hash_session = {"amenity" => "1"}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => "--", :unpack_arrays => ","})
  assert_equal({'amenity' => []}, hash_session)

  # knock out entire dest hash if "--" is passed for source
  hash_params = {'amenity' => ["--", "2"]}
  hash_session = {'amenity' => ["1", "3", "7+"]}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => "--", :unpack_arrays => ","})
  assert_equal({'amenity' => ["2"]}, hash_session)

  # knock out entire dest hash if "--" is passed for source
  hash_params = {'amenity' => ["--", "2"]}
  hash_session = {'amenity' => "5"}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => "--", :unpack_arrays => ","})
  assert_equal({'amenity' => ['2']}, hash_session)

  # knock out entire dest hash if "--" is passed for source
  hash_params = {'amenity' => "--"}
  hash_session = {"amenity"=>{"id"=>["1", "2", "3", "4"]}}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => "--", :unpack_arrays => ","})
  assert_equal({'amenity' => ""}, hash_session)

  # knock out entire dest hash if "--" is passed for source
  hash_params = {'amenity' => ["--"]}
  hash_session = {"amenity"=>{"id"=>["1", "2", "3", "4"]}}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => "--", :unpack_arrays => ","})
  assert_equal({'amenity' => []}, hash_session)

  # knock out dest array if "--" is passed for source
  hash_params = {"region" => {'ids' => FIELD_KNOCKOUT_PREFIX}}
  hash_session = {"region"=>{"ids"=>["1", "2", "3", "4"]}}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({'region' => {'ids' => ""}}, hash_session)

  # knock out dest array but leave other elements of hash intact
  hash_params = {"region" => {'ids' => FIELD_KNOCKOUT_PREFIX}}
  hash_session = {"region"=>{"ids"=>["1", "2", "3", "4"], 'id'=>'11'}}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({'region' => {'ids' => "", 'id'=>'11'}}, hash_session)

  # knock out entire tree of dest hash
  hash_params = {"region" => FIELD_KNOCKOUT_PREFIX}
  hash_session = {"region"=>{"ids"=>["1", "2", "3", "4"], 'id'=>'11'}}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({'region' => ""}, hash_session)

  # knock out entire tree of dest hash - retaining array format
  hash_params = {"region" => {'ids' => [FIELD_KNOCKOUT_PREFIX]}}
  hash_session = {"region"=>{"ids"=>["1", "2", "3", "4"], 'id'=>'11'}}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({'region' => {'ids' => [], 'id'=>'11'}}, hash_session)

  # knock out entire tree of dest hash & replace with new content
  hash_params = {"region" => {'ids' => ["2", FIELD_KNOCKOUT_PREFIX, "6"]}}
  hash_session = {"region"=>{"ids"=>["1", "2", "3", "4"], 'id'=>'11'}}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({'region' => {'ids' => ["2", "6"], 'id'=>'11'}}, hash_session)

  # knock out entire tree of dest hash & replace with new content
  hash_params = {"region" => {'ids' => ["7", FIELD_KNOCKOUT_PREFIX, "6"]}}
  hash_session = {"region"=>{"ids"=>["1", "2", "3", "4"], 'id'=>'11'}}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({'region' => {'ids' => ["7", "6"], 'id'=>'11'}}, hash_session)

  # edge test: make sure that when we turn off knockout_prefix that all values are processed correctly
  hash_params = {"region" => {'ids' => ["7", "--", "2", "6,8"]}}
  hash_session = {"region"=>{"ids"=>["1", "2", "3", "4"], 'id'=>'11'}}
  DeepMerge::deep_merge!(hash_params, hash_session, {:unpack_arrays => ","})
  assert_equal({'region' => {'ids' => ["1", "2", "3", "4", "7", "--", "6", "8"], 'id'=>'11'}}, hash_session)

  # edge test 2: make sure that when we turn off source array split that all values are processed correctly
  hash_params = {"region" => {'ids' => ["7", "3", "--", "6,8"]}}
  hash_session = {"region"=>{"ids"=>["1", "2", "3", "4"], 'id'=>'11'}}
  DeepMerge::deep_merge!(hash_params, hash_session)
  assert_equal({'region' => {'ids' => ["1", "2", "3", "4", "7", "--", "6,8"], 'id'=>'11'}}, hash_session)

  # Example: src = {'key' => "--1"}, dst = {'key' => "1"} -> merges to {'key' => ""}
  hash_params = {"amenity"=>"--1"}
  hash_session = {"amenity"=>"1"}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX})
  assert_equal({"amenity"=>""}, hash_session)

  # Example: src = {'key' => "--1"}, dst = {'key' => "2"} -> merges to {'key' => ""}
  hash_params = {"amenity"=>"--1"}
  hash_session = {"amenity"=>"2"}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX})
  assert_equal({"amenity"=>""}, hash_session)

  # Example: src = {'key' => "--1"}, dst = {'key' => "1"} -> merges to {'key' => ""}
  hash_params = {"amenity"=>["--1"]}
  hash_session = {"amenity"=>"1"}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX})
  assert_equal({"amenity"=>[]}, hash_session)

  # Example: src = {'key' => "--1"}, dst = {'key' => "1"} -> merges to {'key' => ""}
  hash_params = {"amenity"=>["--1"]}
  hash_session = {"amenity"=>["1"]}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX})
  assert_equal({"amenity"=>[]}, hash_session)

  # Example: src = {'key' => "--1"}, dst = {'key' => "1"} -> merges to {'key' => ""}
  hash_params = {"amenity"=>"--1"}
  hash_session = {}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX})
  assert_equal({"amenity"=>""}, hash_session)


  # Example: src = {'key' => "--1"}, dst = {'key' => "1"} -> merges to {'key' => ""}
  hash_params = {"amenity"=>"--1"}
  hash_session = {"amenity"=>["1"]}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX})
  assert_equal({"amenity"=>""}, hash_session)

  #are unmerged hashes passed unmodified w/out :unpack_arrays?
  hash_params = {"amenity"=>{"id"=>["26,27"]}}
  hash_session = {}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX})
  assert_equal({"amenity"=>{"id"=>["26,27"]}}, hash_session)

  #hash should be merged
  hash_params = {"amenity"=>{"id"=>["26,27"]}}
  hash_session = {}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({"amenity"=>{"id"=>["26","27"]}}, hash_session)

  # second merge of same values should result in no change in output
  hash_params = {"amenity"=>{"id"=>["26,27"]}}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({"amenity"=>{"id"=>["26","27"]}}, hash_session)

  #hashes with knockout values are suppressed
  hash_params = {"amenity"=>{"id"=>["#{FIELD_KNOCKOUT_PREFIX}26,#{FIELD_KNOCKOUT_PREFIX}27,28"]}}
  hash_session = {}
  DeepMerge::deep_merge!(hash_params, hash_session, {:knockout_prefix => FIELD_KNOCKOUT_PREFIX, :unpack_arrays => ","})
  assert_equal({"amenity"=>{"id"=>["28"]}}, hash_session)

  hash_src= {'region' =>{'ids'=>['--']}, 'query_uuid' => 'zzz'}
  hash_dst= {'region' =>{'ids'=>['227','2','3','3']}, 'query_uuid' => 'zzz'}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:knockout_prefix => '--', :unpack_arrays => ","})
  assert_equal({'region' =>{'ids'=>[]}, 'query_uuid' => 'zzz'}, hash_dst)

  hash_src= {'region' =>{'ids'=>['--']}, 'query_uuid' => 'zzz'}
  hash_dst= {'region' =>{'ids'=>['227','2','3','3'], 'id' => '3'}, 'query_uuid' => 'zzz'}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:knockout_prefix => '--', :unpack_arrays => ","})
  assert_equal({'region' =>{'ids'=>[], 'id'=>'3'}, 'query_uuid' => 'zzz'}, hash_dst)

  hash_src= {'region' =>{'ids'=>['--']}, 'query_uuid' => 'zzz'}
  hash_dst= {'region' =>{'muni_city_id' => '2244', 'ids'=>['227','2','3','3'], 'id'=>'3'}, 'query_uuid' => 'zzz'}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:knockout_prefix => '--', :unpack_arrays => ","})
  assert_equal({'region' =>{'muni_city_id' => '2244', 'ids'=>[], 'id'=>'3'}, 'query_uuid' => 'zzz'}, hash_dst)

  hash_src= {'region' =>{'ids'=>['--'], 'id' => '5'}, 'query_uuid' => 'zzz'}
  hash_dst= {'region' =>{'muni_city_id' => '2244', 'ids'=>['227','2','3','3'], 'id'=>'3'}, 'query_uuid' => 'zzz'}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:knockout_prefix => '--', :unpack_arrays => ","})
  assert_equal({'region' =>{'muni_city_id' => '2244', 'ids'=>[], 'id'=>'5'}, 'query_uuid' => 'zzz'}, hash_dst)

  hash_src= {'region' =>{'ids'=>['--', '227'], 'id' => '5'}, 'query_uuid' => 'zzz'}
  hash_dst= {'region' =>{'muni_city_id' => '2244', 'ids'=>['227','2','3','3'], 'id'=>'3'}, 'query_uuid' => 'zzz'}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:knockout_prefix => '--', :unpack_arrays => ","})
  assert_equal({'region' =>{'muni_city_id' => '2244', 'ids'=>['227'], 'id'=>'5'}, 'query_uuid' => 'zzz'}, hash_dst)

  hash_src= {'region' =>{'muni_city_id' => '--', 'ids'=>'--', 'id'=>'5'}, 'query_uuid' => 'zzz'}
  hash_dst= {'region' =>{'muni_city_id' => '2244', 'ids'=>['227','2','3','3'], 'id'=>'3'}, 'query_uuid' => 'zzz'}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:knockout_prefix => '--', :unpack_arrays => ","})
  assert_equal({'region' =>{'muni_city_id' => '', 'ids'=>'', 'id'=>'5'}, 'query_uuid' => 'zzz'}, hash_dst)

  hash_src= {'region' =>{'muni_city_id' => '--', 'ids'=>['--'], 'id'=>'5'}, 'query_uuid' => 'zzz'}
  hash_dst= {'region' =>{'muni_city_id' => '2244', 'ids'=>['227','2','3','3'], 'id'=>'3'}, 'query_uuid' => 'zzz'}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:knockout_prefix => '--', :unpack_arrays => ","})
  assert_equal({'region' =>{'muni_city_id' => '', 'ids'=>[], 'id'=>'5'}, 'query_uuid' => 'zzz'}, hash_dst)

  hash_src= {'region' =>{'muni_city_id' => '--', 'ids'=>['--','227'], 'id'=>'5'}, 'query_uuid' => 'zzz'}
  hash_dst= {'region' =>{'muni_city_id' => '2244', 'ids'=>['227','2','3','3'], 'id'=>'3'}, 'query_uuid' => 'zzz'}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:knockout_prefix => '--', :unpack_arrays => ","})
  assert_equal({'region' =>{'muni_city_id' => '', 'ids'=>['227'], 'id'=>'5'}, 'query_uuid' => 'zzz'}, hash_dst)

  hash_src = {"muni_city_id"=>"--", "id"=>""}
  hash_dst = {"muni_city_id"=>"", "id"=>""}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:knockout_prefix => '--', :unpack_arrays => ","})
  assert_equal({"muni_city_id"=>"", "id"=>""}, hash_dst)

  hash_src = {"region"=>{"muni_city_id"=>"--", "id"=>""}}
  hash_dst = {"region"=>{"muni_city_id"=>"", "id"=>""}}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:knockout_prefix => '--', :unpack_arrays => ","})
  assert_equal({"region"=>{"muni_city_id"=>"", "id"=>""}}, hash_dst)

  hash_src = {"query_uuid"=>"a0dc3c84-ec7f-6756-bdb0-fff9157438ab", "url_regions"=>[], "region"=>{"muni_city_id"=>"--", "id"=>""}, "property"=>{"property_type_id"=>"", "search_rate_min"=>"", "search_rate_max"=>""}, "task"=>"search", "run_query"=>"Search"}
  hash_dst = {"query_uuid"=>"a0dc3c84-ec7f-6756-bdb0-fff9157438ab", "url_regions"=>[], "region"=>{"muni_city_id"=>"", "id"=>""}, "property"=>{"property_type_id"=>"", "search_rate_min"=>"", "search_rate_max"=>""}, "task"=>"search", "run_query"=>"Search"}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:knockout_prefix => '--', :unpack_arrays => ","})
  assert_equal({"query_uuid"=>"a0dc3c84-ec7f-6756-bdb0-fff9157438ab", "url_regions"=>[], "region"=>{"muni_city_id"=>"", "id"=>""}, "property"=>{"property_type_id"=>"", "search_rate_min"=>"", "search_rate_max"=>""}, "task"=>"search", "run_query"=>"Search"}, hash_dst)

  # hash of array of hashes
  hash_src = {"item" => [{"1" => "3"}, {"2" => "4"}]}
  hash_dst = {"item" => [{"3" => "5"}]}
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"item" => [{"3" => "5"}, {"1" => "3"}, {"2" => "4"}]}, hash_dst)

  ######################################
  # tests for "merge_hash_arrays" option

  hash_src = {"item" => [{"1" => "3"}]}
  hash_dst = {"item" => [{"3" => "5"}]}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:merge_hash_arrays => true})
  assert_equal({"item" => [{"3" => "5", "1" => "3"}]}, hash_dst)

  hash_src = {"item" => [{"1" => "3"}, {"2" => "4"}]}
  hash_dst = {"item" => [{"3" => "5"}]}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:merge_hash_arrays => true})
  assert_equal({"item" => [{"3" => "5", "1" => "3"}, {"2" => "4"}]}, hash_dst)

  hash_src = {"item" => [{"1" => "3"}]}
  hash_dst = {"item" => [{"3" => "5"}, {"2" => "4"}]}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:merge_hash_arrays => true})
  assert_equal({"item" => [{"3" => "5", "1" => "3"}, {"2" => "4"}]}, hash_dst)

  # if arrays contain non-hash objects, the :merge_hash_arrays option has
  # no effect.
  hash_src = {"item" => [{"1" => "3"}, "str"]}  # contains "str", non-hash
  hash_dst = {"item" => [{"3" => "5"}]}
  DeepMerge::deep_merge!(hash_src, hash_dst, {:merge_hash_arrays => true})
  assert_equal({"item" => [{"3" => "5"}, {"1" => "3"}, "str"]}, hash_dst)

  # Merging empty strings
  s1, s2 = "hello", ""
  [s1, s2].each { |s| s.extend StringBlank }
  hash_dst = {"item" => s1 }
  hash_src = {"item" => s2 }
  DeepMerge::deep_merge!(hash_src, hash_dst)
  assert_equal({"item" => ""}, hash_dst)
end

#test_hash_deep_merge ⇒ Object

show that Hash object has deep merge capabilities in form of three methods:

ko_deep_merge! # uses '--' knockout and overwrites unmergeable
deep_merge! # overwrites unmergeable
deep_merge # skips unmergeable

# File 'lib/puppet/vendor/deep_merge/test/test_deep_merge.rb', line 23

def test_hash_deep_merge
  x = {}
  assert x.respond_to?('deep_merge!'.to_sym)
  hash_src  = {'id' => [3,4,5]}
  hash_dest = {'id' => [1,2,3]}
  assert hash_dest.ko_deep_merge!(hash_src)
  assert_equal({'id' => [1,2,3,4,5]}, hash_dest)

  hash_src  = {'id' => [3,4,5]}
  hash_dest = {'id' => [1,2,3]}
  assert hash_dest.deep_merge!(hash_src)
  assert_equal({'id' => [1,2,3,4,5]}, hash_dest)

  hash_src  = {'id' => 'xxx'}
  hash_dest = {'id' => [1,2,3]}
  assert hash_dest.deep_merge(hash_src)
  assert_equal({'id' => [1,2,3]}, hash_dest)
end