Merge branch 'master' into mac_uid

1 files changed, 58 insertions, 0 deletions

diff --git a/spec/unit/decorator/lazy_array_spec.rb b/spec/unit/decorator/lazy_array_spec.rb
new file mode 100644
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+++ b/spec/unit/decorator/lazy_array_spec.rb
@@ -0,0 +1,58 @@
+#
+# Author:: Lamont Granquist (<lamont@chef.io>)
+# Copyright:: Copyright 2015-2016, Chef Software Inc.
+# License:: Apache License, Version 2.0
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+require "spec_helper"
+
+describe Chef::Decorator::LazyArray do
+  def foo
+    @foo ||= 1
+  end
+
+  def bar
+    @bar ||= 2
+  end
+
+  let(:decorator) do
+    Chef::Decorator::LazyArray.new { [ foo, bar ] }
+  end
+
+  it "behaves like an array" do
+    expect(decorator[0]).to eql(1)
+    expect(decorator[1]).to eql(2)
+  end
+
+  it "accessing the array elements is lazy" do
+    expect(decorator[0].class).to eql(Chef::Decorator::Lazy)
+    expect(decorator[1].class).to eql(Chef::Decorator::Lazy)
+    expect(@foo).to be nil
+    expect(@bar).to be nil
+  end
+
+  it "calling a method on the array element runs the proc (and both elements are autovivified)" do
+    expect(decorator[0].nil?).to be false
+    expect(@foo).to equal(1)
+    expect(@bar).to equal(2)
+  end
+
+  it "if we loop over the elements and do nothing then its not lazy" do
+    # we don't know how many elements there are unless we evaluate the proc
+    decorator.each { |i| }
+    expect(@foo).to equal(1)
+    expect(@bar).to equal(2)
+  end
+end