Don't fail when there are no spec files to be run

lib/guard/rspec/runner.rb

@@ -17,14 +17,14 @@ def initialize(options = {})
       def run_all
         paths = options[:spec_paths]
         options = @options.merge(@options[:run_all]).freeze
-        return if paths.empty?
+        return true if paths.empty?
         ::Guard::UI.info(options[:message], reset: true)
         _run(true, paths, options)
       end
 
       def run(paths)
         paths = inspector.paths(paths)
-        return if paths.empty?
+        return true if paths.empty?
         ::Guard::UI.info("Running: #{paths.join(' ')}", reset: true)
         _run(false, paths, options)
       end

spec/lib/guard/rspec/runner_spec.rb

@@ -40,6 +40,17 @@
     end
   end
 
+  shared_examples 'abort' do
+    it 'aborts' do
+      expect(Guard::UI).to_not receive(:info)
+      subject
+    end
+
+    it 'returns true' do
+      expect(subject).to be true
+    end
+  end
+
   describe '#run_all' do
     let(:options) { {
       spec_paths: %w[spec1 spec2],
@@ -56,6 +67,17 @@
       runner.run_all
     end
 
+    context 'when no paths are given' do
+      subject { runner.run_all }
+
+      let(:options) { {
+        spec_paths: [],
+        run_all: { message: 'Custom message' }
+      } }
+
+      include_examples 'abort'
+    end
+
     context 'with custom cmd' do
       before {
         options[:run_all][:cmd] = 'rspec -t ~slow'
@@ -82,10 +104,14 @@
       runner.run(paths)
     end
 
-    it 'returns if no paths are given' do
-      allow(inspector).to receive(:paths) { [] }
-      expect(Guard::UI).to_not receive(:info)
-      runner.run([])
+    context 'when no paths are given' do
+      subject { runner.run([]) }
+
+      before do
+        allow(inspector).to receive(:paths) { [] }
+      end
+
+      include_examples 'abort'
     end
 
     it 'builds commands with spec paths' do