Add tests for MODULES-5651

Author: hunner

spec/unit/puppet/provider/file_line/ruby_spec.rb

@@ -235,6 +235,34 @@
         end
       end
     end
+    describe 'MODULES-5651' do
+      let(:params) { {
+        line: 'LogLevel=notice',
+        match: '^#LogLevel$',
+      } }
+      context "match, no line" do
+        let(:content) { "#LogLevel\nstuff" }
+        it 'requests changes' do
+          expect(provider.exists?).to be_falsy
+        end
+        it 'replaces the match' do
+          provider.create
+          expect(File.read(tmpfile).chomp).to eq("LogLevel=notice\nstuff")
+        end
+      end
+      context "match, line" do
+        let(:content) { "#Loglevel\nLogLevel=notice\nstuff" }
+        it 'does not request changes' do
+          expect(provider.exists?).to be_truthy
+        end
+      end
+      context "no match, line" do
+        let(:content) { "LogLevel=notice\nstuff" }
+        it 'does not request changes' do
+          expect(provider.exists?).to be_truthy
+        end
+      end
+    end
   end
   describe "#create" do
     context "when adding" do