feat: add plugins for zsh

.zsh/zsh-autosuggestions/spec/widgets/enable_spec.rb

@@ -0,0 +1,42 @@
+describe 'the `autosuggest-enable` widget' do
+  before do
+    session.
+      run_command('typeset -g _ZSH_AUTOSUGGEST_DISABLED').
+      run_command('bindkey ^B autosuggest-enable')
+  end
+
+  it 'enables suggestions and fetches a suggestion' do
+    with_history('echo hello') do
+      session.send_string('e')
+      sleep 1
+      expect(session.content).to eq('e')
+
+      session.send_keys('C-b')
+      session.send_string('c')
+      wait_for { session.content }.to eq('echo hello')
+    end
+  end
+
+  context 'invoked on an empty buffer' do
+    it 'does not fetch a suggestion' do
+      with_history('echo hello') do
+        session.send_keys('C-b')
+        sleep 1
+        expect(session.content).to eq('')
+      end
+    end
+  end
+
+  context 'invoked on a non-empty buffer' do
+    it 'fetches a suggestion' do
+      with_history('echo hello') do
+        session.send_string('e')
+        sleep 1
+        expect(session.content).to eq('e')
+
+        session.send_keys('C-b')
+        wait_for { session.content }.to eq('echo hello')
+      end
+    end
+  end
+end