describe GitHubChangelogGenerator::ParserFile do describe ".github_changelog_generator" do context "when no has file" do let(:options) { {} } let(:parse) { GitHubChangelogGenerator::ParserFile.new(options) } subject { parse.parse! } it { is_expected.to be_nil } end context "when file is empty" do let(:options) { { params_file: "spec/files/github_changelog_params_empty" } } let(:parse) { GitHubChangelogGenerator::ParserFile.new(options) } it "does not change the options" do expect { parse.parse! }.to_not change { options } end end context "when file is incorrect" do let(:options) { { params_file: "spec/files/github_changelog_params_incorrect" } } let(:options_before_change) { options.dup } let(:parse) { GitHubChangelogGenerator::ParserFile.new(options) } it { expect { parse.parse! }.to raise_error } end context "when override default values" do let(:default_options) { GitHubChangelogGenerator::Parser.default_options } let(:options) { { params_file: "spec/files/github_changelog_params_override" }.merge(default_options) } let(:options_before_change) { options.dup } let(:parse) { GitHubChangelogGenerator::ParserFile.new(options) } it "changes the options" do expect { parse.parse! }.to change { options } .from(options_before_change) .to(options_before_change.merge(unreleased_label: "staging", unreleased: false, header: "=== Changelog ===")) end end end end