mongo-ruby-driver/tests/test_ordered_hash.rb

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$LOAD_PATH[0,0] = File.join(File.dirname(__FILE__), '..', 'lib')
require 'mongo/util/ordered_hash'
require 'test/unit'
class OrderedHashTest < Test::Unit::TestCase
def setup
@oh = OrderedHash.new
@oh['c'] = 1
@oh['a'] = 2
@oh['z'] = 3
@ordered_keys = %w(c a z)
end
def test_empty
assert_equal [], OrderedHash.new.keys
end
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def test_equality
a = OrderedHash.new
a['x'] = 1
a['y'] = 2
b = OrderedHash.new
b['y'] = 2
b['x'] = 1
c = OrderedHash.new
c['x'] = 1
c['y'] = 2
d = OrderedHash.new
d['x'] = 2
d['y'] = 3
e = OrderedHash.new
e['z'] = 1
e['y'] = 2
assert_equal a, c
assert_not_equal a, b
assert_not_equal a, d
assert_not_equal a, e
end
def test_order_preserved
assert_equal @ordered_keys, @oh.keys
end
def test_order_preserved_after_replace
@oh['a'] = 42
assert_equal @ordered_keys, @oh.keys
@oh['c'] = 'foobar'
assert_equal @ordered_keys, @oh.keys
@oh['z'] = /huh?/
assert_equal @ordered_keys, @oh.keys
end
def test_each
keys = []
@oh.each { |k, v| keys << k }
assert_equal keys, @oh.keys
@oh['z'] = 42
assert_equal keys, @oh.keys
end
def test_values
assert_equal [1, 2, 3], @oh.values
end
def test_merge
other = OrderedHash.new
other['f'] = 'foo'
noob = @oh.merge(other)
assert_equal @ordered_keys + ['f'], noob.keys
assert_equal [1, 2, 3, 'foo'], noob.values
end
def test_merge_bang
other = OrderedHash.new
other['f'] = 'foo'
@oh.merge!(other)
assert_equal @ordered_keys + ['f'], @oh.keys
assert_equal [1, 2, 3, 'foo'], @oh.values
end
def test_merge_bang_with_overlap
other = OrderedHash.new
other['a'] = 'apple'
other['c'] = 'crab'
other['f'] = 'foo'
@oh.merge!(other)
assert_equal @ordered_keys + ['f'], @oh.keys
assert_equal ['crab', 'apple', 3, 'foo'], @oh.values
end
def test_merge_bang_with_hash_with_overlap
other = Hash.new
other['a'] = 'apple'
other['c'] = 'crab'
other['f'] = 'foo'
@oh.merge!(other)
assert_equal @ordered_keys + ['f'], @oh.keys
assert_equal ['crab', 'apple', 3, 'foo'], @oh.values
end
def test_inspect_retains_order
assert_equal '{"c"=>1, "a"=>2, "z"=>3}', @oh.inspect
end
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def test_clear
@oh.clear
assert @oh.keys.empty?
end
def test_delete
assert @oh.keys.include?('z')
@oh.delete('z')
assert !@oh.keys.include?('z')
end
def test_delete_if
assert @oh.keys.include?('z')
@oh.delete_if { |k,v| k == 'z' }
assert !@oh.keys.include?('z')
end
end