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Contents
require "spec_setup"
require "insist"
require "insist/predicates"
# The predicates feature will delegateany predicate method calls (ones ending
# in "?") to the block value and fail if the return is false.
describe Insist::Predicates do
describe "#is_a?" do
it "should succeed if value#is_a? returns true" do
insist { "some string" }.is_a?(Object)
insist { "some string" }.is_a?(String)
end
it "should fail if value#is_a? returns false" do
reject { "some string" }.is_a?(Numeric)
reject { "some string" }.is_a?(Fixnum)
reject { "some string" }.is_a?(File)
end
end
describe "#respond_to?" do
subject do
insist { [1, 2, 3] }
end
it "should be OK if the #value responds to a given method" do
subject.respond_to?(:[])
subject.respond_to?(:to_a)
subject.respond_to?(:each)
end
it "should fail if the #value does not respond to a given method" do
insist { subject.respond_to?(:SOME_INVALID_METHOD) }.fails
end
it "should fail if the respond_to? is invoked incorrectly" do
insist { subject.respond_to? }.raises(ArgumentError)
end
end # #respond_to?
describe "#empty?" do
it "should be OK if the #value.empty? returns true" do
insist { [] }.empty?
insist { {} }.empty?
insist { "" }.empty?
end
it "should fail if the #value.empty? returns a false" do
insist { insist { [1] }.empty? }.fails
insist { insist { { :foo => :bar } }.empty? }.fails
insist { insist { "hello" }.empty? }.fails
end
end # #empty?
end
Version data entries
67 entries across 63 versions & 18 rubygems