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require_relative '../../spec_helper'
require_relative 'fixtures/classes'
describe "Array#assoc" do
it "returns the first array whose 1st item is == obj or nil" do
s1 = ["colors", "red", "blue", "green"]
s2 = [:letters, "a", "b", "c"]
s3 = [4]
s4 = ["colors", "cyan", "yellow", "magenda"]
s5 = [:letters, "a", "i", "u"]
s_nil = [nil, nil]
a = [s1, s2, s3, s4, s5, s_nil]
a.assoc(s1.first).should equal(s1)
a.assoc(s2.first).should equal(s2)
a.assoc(s3.first).should equal(s3)
a.assoc(s4.first).should equal(s1)
a.assoc(s5.first).should equal(s2)
a.assoc(s_nil.first).should equal(s_nil)
a.assoc(4).should equal(s3)
a.assoc("key not in array").should be_nil
end
it "calls == on first element of each array" do
key1 = 'it'
key2 = mock('key2')
items = [['not it', 1], [ArraySpecs::AssocKey.new, 2], ['na', 3]]
items.assoc(key1).should equal(items[1])
items.assoc(key2).should be_nil
end
it "ignores any non-Array elements" do
[1, 2, 3].assoc(2).should be_nil
s1 = [4]
s2 = [5, 4, 3]
a = ["foo", [], s1, s2, nil, []]
a.assoc(s1.first).should equal(s1)
a.assoc(s2.first).should equal(s2)
end
end
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