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require 'spec_helper'
require 'buff/config/json'
describe Buff::Config::JSON do
let(:json) do
%(
{
"name": "reset",
"job": "programmer",
"status": "awesome"
}
)
end
describe "ClassMethods" do
subject do
Class.new(Buff::Config::JSON) do
attribute :name, required: true
attribute :job
end
end
describe "::from_hash" do
let(:hash) { JSON.parse(json) }
it "returns an instance of the inheriting class" do
expect(subject.from_hash(hash)).to be_a(subject)
end
end
describe "::from_json" do
it "returns an instance of the inheriting class" do
expect(subject.from_json(json)).to be_a(subject)
end
it "assigns values for each defined attribute" do
config = subject.from_json(json)
expect(config[:name]).to eql("reset")
expect(config[:job]).to eql("programmer")
end
end
describe "::from_file" do
let(:file) { tmp_path.join("test_config.json").to_s }
before(:each) do
File.open(file, "w") { |f| f.write(json) }
end
it "returns an instance of the inheriting class" do
expect(subject.from_file(file)).to be_a(subject)
end
it "sets the object's filepath to the path of the loaded file" do
expect(subject.from_file(file).path).to eql(file)
end
context "given a file that does not exist" do
it "raises a Buff::Errors::ConfigNotFound error" do
expect { subject.from_file(tmp_path.join("asdf.txt")) }.to raise_error(Buff::Errors::ConfigNotFound)
end
end
end
end
subject do
Class.new(Buff::Config::JSON) do
attribute :name, required: true
attribute :job
end.new
end
describe "#to_json" do
before(:each) do
subject.name = "reset"
subject.job = "programmer"
end
it "returns JSON with key values for each attribute" do
hash = parse_json(subject.to_json)
expect(hash).to have_key("name")
expect(hash["name"]).to eql("reset")
expect(hash).to have_key("job")
expect(hash["job"]).to eql("programmer")
end
end
describe "#from_json" do
it "returns an instance of the updated class" do
expect(subject.from_json(json)).to be_a(Buff::Config::JSON)
end
it "assigns values for each defined attribute" do
config = subject.from_json(json)
expect(config.name).to eql("reset")
expect(config.job).to eql("programmer")
end
end
describe "#save" do
it "raises a ConfigSaveError if no path is set or given" do
subject.path = nil
expect { subject.save }.to raise_error(Buff::Errors::ConfigSaveError)
end
end
describe "#reload" do
before(:each) do
subject.path = tmp_path.join('tmpconfig.json').to_s
subject.save
end
it "returns self" do
expect(subject.reload).to eql(subject)
end
it "updates the contents of self from disk" do
original = subject.class.from_file(subject.path)
subject.job = "programmer"
subject.save
expect(original.job).to be_nil
original.reload
expect(original.job).to eql("programmer")
end
it "raises ConfigNotFound if the path is nil" do
subject.path = nil
expect { subject.reload }.to raise_error(Buff::Errors::ConfigNotFound)
end
end
end
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