Implement suggestion integration tests in RSpec + tmux

spec/strategies/match_prev_cmd_spec.rb

@@ -0,0 +1,60 @@
+describe 'match_prev_cmd strategy' do
+  let(:session) { TerminalSession.new }
+
+  before do
+    session.run_command('source zsh-autosuggestions.zsh')
+    session.run_command('ZSH_AUTOSUGGEST_STRATEGY=match_prev_cmd')
+    session.run_command('fc -p')
+    session.clear
+  end
+
+  after do
+    session.destroy
+  end
+
+  context 'with some history entries' do
+    before do
+      session.run_command('echo what')
+      session.run_command('ls foo')
+      session.run_command('echo what')
+      session.run_command('ls bar')
+      session.run_command('ls baz')
+
+      session.clear
+    end
+
+    it 'suggests nothing if prefix does not match' do
+      session.send_string('ls q')
+      wait_for { session.content }.to eq('ls q')
+    end
+
+    it 'suggests the most recent matching history item' do
+      session.send_string('ls')
+      wait_for { session.content }.to eq('ls baz')
+    end
+
+    it 'suggests the most recent after the previous command' do
+      session.run_command('echo what')
+      session.clear
+
+      session.send_string('ls')
+      wait_for { session.content }.to eq('ls bar')
+    end
+  end
+
+  context 'with a multiline hist entry' do
+    before do
+      session.send_string('echo "')
+      session.send_keys('enter')
+      session.send_string('"')
+      session.send_keys('enter')
+
+      session.clear
+    end
+
+    it do
+      session.send_keys('e')
+      wait_for { session.content }.to eq "echo \"\n\""
+    end
+  end
+end