Add tests for label filtering

Signed-off-by: Tom Duffield <tom@chef.io>

spec/unit/generator/generator_processor_spec.rb

@@ -17,14 +17,56 @@ module GitHubChangelogGenerator
         expect(result).not_to include(issue)
       end
 
-      context "with no option given" do
-        subject(:generator) { described_class.new }
-        it "passes everything through when no option given" do
-          result = generator.exclude_issues_by_labels(issues)
+      it { is_expected.to eq(expected_issues) }
+    end
 
-          expect(result).to eq(issues)
+    context "get_filtered_issues" do
+      let(:default_options) { GitHubChangelogGenerator::Parser.default_options }
+      let(:options) { {} }
+      let(:generator) { described_class.new(default_options.merge(options)) }
+
+      let(:bad_label) { { "name" => "BAD" } }
+      let(:bad_issue) { { "labels" => [bad_label] } }
+      let(:good_label) { { "name" => "GOOD" } }
+      let(:good_issue) { { "labels" => [good_label] } }
+      let(:unlabeled_issue) { { "labels" => [] } }
+      let(:issues) { [bad_issue, good_issue, unlabeled_issue] }
+
+      subject do
+        generator.get_filtered_issues(issues)
+      end
+
+      let(:expected_issues) { issues }
+
+      it { is_expected.to eq(expected_issues) }
+
+      describe "when 'exclude_labels' is provided" do
+        let(:options) { { exclude_labels: %w(BAD BOO) } }
+        let(:expected_issues) { [good_issue, unlabeled_issue] }
+
+        it { is_expected.to eq(expected_issues) }
       end
     end
+
+    context "when 'add_issues_wo_labels' is false" do
+      let(:options) { { add_issues_wo_labels: false } }
+      let(:expected_issues) { [bad_issue, good_issue] }
+
+      it { is_expected.to eq(expected_issues) }
+
+      context "with 'exclude_labels'" do
+        let(:options) { { add_issues_wo_labels: false, exclude_labels: %w(GOOD) } }
+        let(:expected_issues) { [bad_issue] }
+
+        it { is_expected.to eq(expected_issues) }
+      end
+    end
+
+    context "when 'include_labels' is specified" do
+      let(:options) { { include_labels: %w(GOOD) } }
+      let(:expected_issues) { [good_issue] }
+
+      it { is_expected.to eq(expected_issues) }
     end
   end
 end