Update integration test to call filter with expected results

Author: kpaulisse

spec/octocatalog-diff/integration/filter_single_item_array.rb

@@ -45,4 +45,48 @@
       )
     end
   end
+
+  context 'with single-item array filter engaged' do
+    before(:all) do
+      @result = OctocatalogDiff::Integration.integration(
+        spec_catalog_old: 'filter-single-item-array-1.json',
+        spec_catalog_new: 'filter-single-item-array-2.json',
+        argv: ['--filters', 'SingleItemArray']
+      )
+      @diffs = OctocatalogDiff::Spec.remove_file_and_line(@result[:diffs])
+    end
+
+    it 'should succeed' do
+      expect(@result[:exitcode]).not_to eq(-1), "Internal error: #{@result[:exception]}\n#{@result[:logs]}"
+      expect(@result[:exitcode]).to eq(2), "Runtime error: #{@result[:logs]}"
+    end
+
+    it 'should contain the correct number of diffs' do
+      expect(@diffs.size).to eq(3), @diffs.inspect
+    end
+
+    it 'should suppress a diff of a string to a single-item array' do
+      expect(@diffs).not_to include(
+        ['~', "File\f/tmp/amazing\fparameters\fnotify", 'Service[foo]', ['Service[foo]']]
+      )
+    end
+
+    it 'should contain a diff of an array whose size has changed' do
+      expect(@diffs).to include(
+        ['~', "File\f/tmp/foobar\fparameters\fnotify", 'Service[foobar]', ['Service[fizzbuzz]', 'Service[foobar]']]
+      )
+    end
+
+    it 'should contain a diff of an array whose elements have changed' do
+      expect(@diffs).to include(
+        ['!', "File\f/tmp/awesome\fparameters\fnotify", ['Service[bar]', 'Service[foo]'], ['Service[baz]', 'Service[foo]']]
+      )
+    end
+
+    it 'should contain a diff of an array that has been added' do
+      expect(@diffs).to include(
+        ['!', "File\f/tmp/fizzbuzz\fparameters\fnotify", nil, ['Service[fizzbuzz]']]
+      )
+    end
+  end
 end