Commit d0c5422

@@ -0,0 +1,63 @@
+require 'spec_helper'
+
+RSpec.describe Del::Message do
+  subject { described_class.new(text, robot: robot, source: source) }
+  let(:robot) { instance_double(Del::Robot) }
+  let(:source) { instance_double(Del::Source) }
+  let(:text) { SecureRandom.hex(16) }
+
+  describe "#reply" do
+    before { allow(source).to receive(:reply) }
+
+    it 'delegates to the source to reply' do
+      subject.reply('hello')
+      expect(source).to have_received(:reply).with(robot, 'hello')
+    end
+  end
+
+  describe "#execute_shell" do
+    before { allow(source).to receive(:reply) }
+
+    it 'executes the command' do
+      result = subject.execute_shell(['ls', '-al'])
+      expect(result).to be_truthy
+    end
+
+    it 'returns false when the shell command fails' do
+      expect(subject.execute_shell(['exit', '1'])).to be_falsey
+    end
+
+    it 'replies with the stdout content' do
+      subject.execute_shell(['echo', 'hello'])
+      expect(source).to have_received(:reply).with(robot, "/code hello\n")
+    end
+
+    it 'yields each line to stdout' do
+      @called = false
+      subject.execute_shell(['echo', 'hello']) do |line|
+        @called = true
+        expect(line).to eql("hello\n")
+      end
+      expect(@called).to be(true)
+    end
+
+    it 'replies with the stderr content' do
+      subject.execute_shell(['>&2', 'echo', 'hello'])
+      expect(source).to have_received(:reply).with(robot, "/code hello\n")
+    end
+
+    it 'yields each line to stderr' do
+      @called = false
+      subject.execute_shell(['>&2', 'echo', 'hello']) do |line|
+        @called = true
+        expect(line).to eql("hello\n")
+      end
+      expect(@called).to be(true)
+    end
+  end
+
+  describe "#to_s" do
+    specify { expect(subject.to_s).to include(source.to_s) }
+    specify { expect(subject.to_s).to include(text) }
+  end
+end