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require File.expand_path(File.dirname(__FILE__) + '/../spec_helper')
require 'thor/core_ext/ordered_hash'
describe Thor::CoreExt::OrderedHash do
before do
@hash = Thor::CoreExt::OrderedHash.new
end
describe "without any items" do
it "returns nil for an undefined key" do
@hash["foo"].should be_nil
end
it "doesn't iterate through any items" do
@hash.each { fail }
end
it "has an empty key and values list" do
@hash.keys.should be_empty
@hash.values.should be_empty
end
it "must be empty" do
@hash.should be_empty
end
end
describe "with several items" do
before do
@hash[:foo] = "Foo!"
@hash[:bar] = "Bar!"
@hash[:baz] = "Baz!"
@hash[:bop] = "Bop!"
@hash[:bat] = "Bat!"
end
it "returns nil for an undefined key" do
@hash[:boom].should be_nil
end
it "returns the value for each key" do
@hash[:foo].should == "Foo!"
@hash[:bar].should == "Bar!"
@hash[:baz].should == "Baz!"
@hash[:bop].should == "Bop!"
@hash[:bat].should == "Bat!"
end
it "iterates through the keys and values in order of assignment" do
arr = []
@hash.each do |key, value|
arr << [key, value]
end
arr.should == [[:foo, "Foo!"], [:bar, "Bar!"], [:baz, "Baz!"],
[:bop, "Bop!"], [:bat, "Bat!"]]
end
it "returns the keys in order of insertion" do
@hash.keys.should == [:foo, :bar, :baz, :bop, :bat]
end
it "returns the values in order of insertion" do
@hash.values.should == ["Foo!", "Bar!", "Baz!", "Bop!", "Bat!"]
end
it "does not move an overwritten node to the end of the ordering" do
@hash[:baz] = "Bip!"
@hash.values.should == ["Foo!", "Bar!", "Bip!", "Bop!", "Bat!"]
@hash[:foo] = "Bip!"
@hash.values.should == ["Bip!", "Bar!", "Bip!", "Bop!", "Bat!"]
@hash[:bat] = "Bip!"
@hash.values.should == ["Bip!", "Bar!", "Bip!", "Bop!", "Bip!"]
end
it "appends another ordered hash while preserving ordering" do
other_hash = Thor::CoreExt::OrderedHash.new
other_hash[1] = "one"
other_hash[2] = "two"
other_hash[3] = "three"
@hash.merge(other_hash).values.should == ["Foo!", "Bar!", "Baz!", "Bop!", "Bat!", "one", "two", "three"]
end
it "overwrites hash keys with matching appended keys" do
other_hash = Thor::CoreExt::OrderedHash.new
other_hash[:bar] = "bar"
@hash.merge(other_hash)[:bar].should == "bar"
@hash[:bar].should == "Bar!"
end
it "converts to an array" do
@hash.to_a.should == [[:foo, "Foo!"], [:bar, "Bar!"], [:baz, "Baz!"], [:bop, "Bop!"], [:bat, "Bat!"]]
end
it "must not be empty" do
@hash.should_not be_empty
end
it "deletes values from hash" do
@hash.delete(:baz).should == "Baz!"
@hash.values.should == ["Foo!", "Bar!", "Bop!", "Bat!"]
@hash.delete(:foo).should == "Foo!"
@hash.values.should == ["Bar!", "Bop!", "Bat!"]
@hash.delete(:bat).should == "Bat!"
@hash.values.should == ["Bar!", "Bop!"]
end
it "returns nil if the value to be deleted can't be found" do
@hash.delete(:nothing).should be_nil
end
end
end
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