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Contents
require "spec_helper"
require "hamster/set"
describe Hamster::Set do
describe "#all?" do
context "when empty" do
it "with a block returns true" do
S.empty.all? {}.should == true
end
it "with no block returns true" do
S.empty.all?.should == true
end
end
context "when not empty" do
context "with a block" do
let(:set) { S["A", "B", "C"] }
it "returns true if the block always returns true" do
set.all? { |item| true }.should == true
end
it "returns false if the block ever returns false" do
set.all? { |item| item == "D" }.should == false
end
it "propagates an exception from the block" do
-> { set.all? { |k,v| raise "help" } }.should raise_error(RuntimeError)
end
it "stops iterating as soon as the block returns false" do
yielded = []
set.all? { |k,v| yielded << k; false }
yielded.size.should == 1
end
end
describe "with no block" do
it "returns true if all values are truthy" do
S[true, "A"].all?.should == true
end
[nil, false].each do |value|
it "returns false if any value is #{value.inspect}" do
S[value, true, "A"].all?.should == false
end
end
end
end
end
end
Version data entries
3 entries across 3 versions & 2 rubygems