repl: Add cls command to clear screen

docs/src/content/docs/watch/index.md

@@ -50,7 +50,10 @@ not connected to the file that changed.
   if a test run is not in progress.
 
 * `clear`
-  Delete all coverage info and re-run the test suite
+  Delete all coverage info and re-run the test suite.
+
+* `cls`
+  Clear the screen.
 
 ## Adding Tests
 

lib/repl.js

@@ -98,6 +98,9 @@ class Repl {
         return this.exit(cb)
       case 'clear':
         return this.clear(cb)
+      case 'cls':
+        this.repl.output.write('\u001b[2J\u001b[H')
+        return cb()
       default:
         return this.help(cb)
     }
@@ -202,6 +205,9 @@ exit
 
 clear
   delete all coverage info and re-run the test suite
+
+cls
+  clear the screen
 `)
     cb()
   }
@@ -215,7 +221,7 @@ clear
     const cmdArg = input.trimLeft().split(' ')
     const cmd = cmdArg.shift()
     const arg = cmdArg.join(' ').trimLeft()
-    const commands = ['r', 'u', 'n', 'p', 'c', 'exit', 'clear']
+    const commands = ['r', 'u', 'n', 'p', 'c', 'exit', 'clear', 'cls']
     if (cmd === 'r' || cmd === 'u') {
       const d = path.dirname(arg)
       const dir = arg.slice(-1) === '/' ? arg : d === '.' ? '' : d + '/'

tap-snapshots/test-repl.js-TAP.test.js

@@ -5,6 +5,10 @@
  * Make sure to inspect the output below.  Do not ignore changes!
  */
 'use strict'
+exports[`test/repl.js TAP cls > clear screen 1`] = `
+"\\u001b[2J\\u001b[HTAP> "
+`
+
 exports[`test/repl.js TAP completer > empty 1`] = `
 Array [
   Array [
@@ -15,6 +19,7 @@ Array [
     "c",
     "exit",
     "clear",
+    "cls",
   ],
   "",
 ]
@@ -175,5 +180,8 @@ exit
 
 clear
   delete all coverage info and re-run the test suite
+
+cls
+  clear the screen
 TAP> 
 `

test/repl.js

@@ -226,6 +226,15 @@ t.test('completer', t => {
   t.end()
 })
 
+t.test('cls', t => {
+  input.write('cls\n')
+  setTimeout(() => {
+    // JSON.stringify it so that it doesn't look gross in patches
+    t.matchSnapshot(JSON.stringify(output.read()), 'clear screen')
+    t.end()
+  })
+})
+
 t.test('exit', t => {
   repl.repl.emit('SIGINT')
   t.matchSnapshot(output.read(), 'output')