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##
# Hash(Ext) Test
assert('Hash#merge!') do
a = { 'abc_key' => 'abc_value', 'cba_key' => 'cba_value' }
b = { 'cba_key' => 'XXX', 'xyz_key' => 'xyz_value' }
result_1 = a.merge! b
a = { 'abc_key' => 'abc_value', 'cba_key' => 'cba_value' }
result_2 = a.merge!(b) do |key, original, new|
original
end
assert_equal({'abc_key' => 'abc_value', 'cba_key' => 'XXX',
'xyz_key' => 'xyz_value' }, result_1)
assert_equal({'abc_key' => 'abc_value', 'cba_key' => 'cba_value',
'xyz_key' => 'xyz_value' }, result_2)
assert_raise(TypeError) do
{ 'abc_key' => 'abc_value' }.merge! "a"
end
end
assert('Hash#values_at') do
h = { "cat" => "feline", "dog" => "canine", "cow" => "bovine" }
assert_equal ["bovine", "feline"], h.values_at("cow", "cat")
keys = []
(0...1000).each { |v| keys.push "#{v}" }
h = Hash.new { |hash,k| hash[k] = k }
assert_equal keys, h.values_at(*keys)
end
assert('Hash#fetch') do
h = { "cat" => "feline", "dog" => "canine", "cow" => "bovine" }
assert_equal "feline", h.fetch("cat")
assert_equal "mickey", h.fetch("mouse", "mickey")
assert_equal "minny", h.fetch("mouse"){"minny"}
begin
h.fetch("gnu")
rescue => e
assert_kind_of(StandardError, e);
end
end
assert("Hash#delete_if") do
base = { 1 => 'one', 2 => false, true => 'true', 'cat' => 99 }
h1 = { 1 => 'one', 2 => false, true => 'true' }
h2 = { 2 => false, 'cat' => 99 }
h3 = { 2 => false }
h = base.dup
assert_equal(h, h.delete_if { false })
assert_equal({}, h.delete_if { true })
h = base.dup
assert_equal(h1, h.delete_if {|k,v| k.instance_of?(String) })
assert_equal(h1, h)
h = base.dup
assert_equal(h2, h.delete_if {|k,v| v.instance_of?(String) })
assert_equal(h2, h)
h = base.dup
assert_equal(h3, h.delete_if {|k,v| v })
assert_equal(h3, h)
h = base.dup
n = 0
h.delete_if {|*a|
n += 1
assert_equal(2, a.size)
assert_equal(base[a[0]], a[1])
h.shift
true
}
assert_equal(base.size, n)
end
assert("Hash#flatten") do
a = {1=> "one", 2 => [2,"two"], 3 => [3, ["three"]]}
assert_equal [1, "one", 2, [2, "two"], 3, [3, ["three"]]], a.flatten
assert_equal [[1, "one"], [2, [2, "two"]], [3, [3, ["three"]]]], a.flatten(0)
assert_equal [1, "one", 2, [2, "two"], 3, [3, ["three"]]], a.flatten(1)
assert_equal [1, "one", 2, 2, "two", 3, 3, ["three"]], a.flatten(2)
assert_equal [1, "one", 2, 2, "two", 3, 3, "three"], a.flatten(3)
end
assert("Hash#invert") do
h = { 1 => 'one', 2 => 'two', 3 => 'three',
true => 'true', nil => 'nil' }.invert
assert_equal 1, h['one']
assert_equal true, h['true']
assert_equal nil, h['nil']
h = { 'a' => 1, 'b' => 2, 'c' => 1 }.invert
assert_equal(2, h.length)
assert_include(%w[a c], h[1])
assert_equal('b', h[2])
end
assert("Hash#keep_if") do
h = { 1 => 2, 3 => 4, 5 => 6 }
assert_equal({3=>4,5=>6}, h.keep_if {|k, v| k + v >= 7 })
h = { 1 => 2, 3 => 4, 5 => 6 }
assert_equal({ 1 => 2, 3=> 4, 5 =>6} , h.keep_if { true })
end
assert("Hash#key") do
h = { "a" => 100, "b" => 200, "c" => 300, "d" => 300, nil => 'nil', 'nil' => nil }
assert_equal "b", h.key(200)
assert_equal "c", h.key(300)
assert_nil h.key(999)
assert_nil h.key('nil')
assert_equal 'nil', h.key(nil)
end
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