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Versions: 27
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Contents
class Boolean
def self_as_an_object
self
end
end
class JsNil
def <(other)
`nil`
end
end
describe "Opal truthyness" do
it "should evaluate to true using js `true` as an object" do
if true.self_as_an_object
called = true
end
called.should be_true
end
it "should evaluate to false using js `false` as an object" do
if false.self_as_an_object
called = true
end
called.should be_nil
end
it "should evaluate to false if js `nil` is used with an operator" do
is_falsey = JsNil.new < 2 ? false : true
is_falsey.should be_true
end
it "should consider false, nil, null, and undefined as not truthy" do
called = nil
[`false`, `nil`, `null`, `undefined`].each do |v|
if v
called = true
end
end
called.should be_nil
end
it "should true as truthy" do
if `true`
called = true
end
called.should be_true
end
it "should handle logic operators correctly for false, nil, null, and undefined" do
(`false` || `nil` || `null` || `undefined` || 1).should == 1
[`false`, `nil`, `null`, `undefined`].each do |v|
`#{1 && v} === #{v}`.should == true
end
end
end
Version data entries
27 entries across 27 versions & 1 rubygems