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require 'spec_helper'
require 'mspec/matchers'
describe BeComputedByMatcher do
it "matches when all entries in the Array compute" do
array = [ [65, "A"],
[90, "Z"] ]
BeComputedByMatcher.new(:chr).matches?(array).should be_true
end
it "matches when all entries in the Array with arguments compute" do
array = [ [1, 2, 3],
[2, 4, 6] ]
BeComputedByMatcher.new(:+).matches?(array).should be_true
end
it "does not match when any entry in the Array does not compute" do
array = [ [65, "A" ],
[91, "Z" ] ]
BeComputedByMatcher.new(:chr).matches?(array).should be_false
end
it "accepts an argument list to apply to each method call" do
array = [ [65, "1000001" ],
[90, "1011010" ] ]
BeComputedByMatcher.new(:to_s, 2).matches?(array).should be_true
end
it "does not match when any entry in the Array with arguments does not compute" do
array = [ [1, 2, 3],
[2, 4, 7] ]
BeComputedByMatcher.new(:+).matches?(array).should be_false
end
it "provides a useful failure message" do
array = [ [65, "A" ],
[91, "Z" ] ]
matcher = BeComputedByMatcher.new(:chr)
matcher.matches?(array)
matcher.failure_message.should == ["Expected \"Z\"", "to be computed by 91.chr (computed \"[\" instead)"]
end
end
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