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require 'spec_helper'
require 'puppet/util/feature'
describe Puppet::Util::Feature do
before do
@features = Puppet::Util::Feature.new("features")
allow(@features).to receive(:warn)
end
it "should not call associated code when adding a feature" do
$loaded_feature = false
@features.add(:myfeature) { $loaded_feature = true}
expect($loaded_feature).to eq(false)
end
it "should consider a feature absent when the feature load fails" do
@features.add(:failer) { raise "foo" }
expect(@features.failer?).to eq(false)
end
it "should consider a feature to be absent when the feature load returns false" do
@features.add(:failer) { false }
expect(@features.failer?).to eq(false)
end
it "should consider a feature to be absent when the feature load returns nil" do
@features.add(:failer) { nil }
expect(@features.failer?).to eq(false)
end
it "should consider a feature to be present when the feature load returns true" do
@features.add(:available) { true }
expect(@features.available?).to eq(true)
end
it "should consider a feature to be present when the feature load returns truthy" do
@features.add(:available) { "yes" }
expect(@features.available?).to eq(true)
end
it "should cache the results of a feature load via code block when the block returns true" do
$loaded_feature = 0
@features.add(:myfeature) { $loaded_feature += 1; true }
@features.myfeature?
@features.myfeature?
expect($loaded_feature).to eq(1)
end
it "should cache the results of a feature load via code block when the block returns false" do
$loaded_feature = 0
@features.add(:myfeature) { $loaded_feature += 1; false }
@features.myfeature?
@features.myfeature?
expect($loaded_feature).to eq(1)
end
it "should not cache the results of a feature load via code block when the block returns nil" do
$loaded_feature = 0
@features.add(:myfeature) { $loaded_feature += 1; nil }
@features.myfeature?
@features.myfeature?
expect($loaded_feature).to eq(2)
end
it "should invalidate the cache for the feature when loading" do
@features.add(:myfeature) { false }
expect(@features).not_to be_myfeature
@features.add(:myfeature)
expect(@features).to be_myfeature
end
it "should support features with libraries" do
expect { @features.add(:puppet, :libs => %w{puppet}) }.not_to raise_error
end
it "should consider a feature to be present if all of its libraries are present" do
@features.add(:myfeature, :libs => %w{foo bar})
expect(@features).to receive(:require).with("foo")
expect(@features).to receive(:require).with("bar")
expect(@features).to be_myfeature
end
it "should log and consider a feature to be absent if any of its libraries are absent" do
@features.add(:myfeature, :libs => %w{foo bar})
expect(@features).to receive(:require).with("foo").and_raise(LoadError)
allow(@features).to receive(:require).with("bar")
expect(@features).to receive(:debug_once)
expect(@features).not_to be_myfeature
end
it "should change the feature to be present when its libraries become available" do
@features.add(:myfeature, :libs => %w{foo bar})
times_feature_require_called = 0
expect(@features).to receive(:require).twice().with("foo") do
times_feature_require_called += 1
if times_feature_require_called == 1
raise LoadError
else
nil
end
end
allow(@features).to receive(:require).with("bar")
allow(Puppet::Util::RubyGems::Source).to receive(:source).and_return(Puppet::Util::RubyGems::Gems18Source)
times_clear_paths_called = 0
allow_any_instance_of(Puppet::Util::RubyGems::Gems18Source).to receive(:clear_paths) { times_clear_paths_called += 1 }
expect(@features).to receive(:debug_once)
expect(@features).not_to be_myfeature
expect(@features).to be_myfeature
expect(times_clear_paths_called).to eq(3)
end
it "should cache load failures when configured to do so" do
Puppet[:always_retry_plugins] = false
@features.add(:myfeature, :libs => %w{foo bar})
expect(@features).to receive(:require).with("foo").and_raise(LoadError)
expect(@features).not_to be_myfeature
# second call would cause an expectation exception if 'require' was
# called a second time
expect(@features).not_to be_myfeature
end
end
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