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module Shoulda # :nodoc:
module Assertions
# Asserts that two arrays contain the same elements, the same number of times. Essentially ==, but unordered.
#
# assert_same_elements([:a, :b, :c], [:c, :a, :b]) => passes
def assert_same_elements(a1, a2, msg = nil)
[:select, :inject, :size].each do |m|
[a1, a2].each {|a| assert_respond_to(a, m, "Are you sure that #{a.inspect} is an array? It doesn't respond to #{m}.") }
end
assert a1h = a1.inject({}) { |h,e| h[e] = a1.select { |i| i == e }.size; h }
assert a2h = a2.inject({}) { |h,e| h[e] = a2.select { |i| i == e }.size; h }
assert_equal(a1h, a2h, msg)
end
# Asserts that the given collection contains item x. If x is a regular expression, ensure that
# at least one element from the collection matches x. +extra_msg+ is appended to the error message if the assertion fails.
#
# assert_contains(['a', '1'], /\d/) => passes
# assert_contains(['a', '1'], 'a') => passes
# assert_contains(['a', '1'], /not there/) => fails
def assert_contains(collection, x, extra_msg = "")
collection = [collection] unless collection.is_a?(Array)
msg = "#{x.inspect} not found in #{collection.to_a.inspect} #{extra_msg}"
case x
when Regexp
assert(collection.detect { |e| e =~ x }, msg)
else
assert(collection.include?(x), msg)
end
end
# Asserts that the given collection does not contain item x. If x is a regular expression, ensure that
# none of the elements from the collection match x.
def assert_does_not_contain(collection, x, extra_msg = "")
collection = [collection] unless collection.is_a?(Array)
msg = "#{x.inspect} found in #{collection.to_a.inspect} " + extra_msg
case x
when Regexp
assert(!collection.detect { |e| e =~ x }, msg)
else
assert(!collection.include?(x), msg)
end
end
# Asserts that the given matcher returns true when +target+ is passed to #matches?
def assert_accepts(matcher, target, options = {})
if matcher.matches?(target)
assert_block { true }
if options[:message]
assert_match options[:message], matcher.negative_failure_message
end
else
assert_block(matcher.failure_message) { false }
end
end
# Asserts that the given matcher returns false when +target+ is passed to #matches?
def assert_rejects(matcher, target, options = {})
unless matcher.matches?(target)
assert_block { true }
if options[:message]
assert_match options[:message], matcher.failure_message
end
else
assert_block(matcher.negative_failure_message) { false }
end
end
end
end
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