pass rows / columns to child process

Author: jamestalmage

lib/fork.js

@@ -10,7 +10,10 @@ var send = require('./send');
 module.exports = function (file, opts) {
 	opts = objectAssign({
 		file: file,
-		isTTY: Boolean(process.stdout.isTTY)
+		tty: process.stdout.isTTY ? {
+			columns: process.stdout.columns,
+			rows: process.stdout.rows
+		} : false
 	}, opts);
 
 	var ps = childProcess.fork(path.join(__dirname, 'test-worker.js'), [JSON.stringify(opts)], {

lib/reporters/mini.js

@@ -159,7 +159,7 @@ MiniReporter.prototype._clear = function () {
 	var columns = process.stdout.columns;
 	lastLine = lastLine.substring(len - (len % columns));
 	if (!lastLine.length) {
-	  if (isWindows || !len) {
+		if (isWindows || !len) {
 			ct++;
 		}
 		return ansiEscapes.eraseLines(ct);

lib/test-worker.js

@@ -3,8 +3,10 @@ var opts = JSON.parse(process.argv[2]);
 var testPath = opts.file;
 
 // Fake TTY support
-if (opts.isTTY) {
+if (opts.tty) {
 	process.stdout.isTTY = true;
+	process.stdout.columns = opts.tty.columns || 80;
+	process.stdout.rows = opts.tty.rows;
 	var tty = require('tty');
 	var isatty = tty.isatty;
 	tty.isatty = function (fd) {

test/visual/text-ends-at-terminal-width.js

@@ -1,11 +1,28 @@
-import test from '../../'
+import test from '../../';
+import delay from 'delay';
 
-
-function writeline() {
-	for (var i = 0; i < 80; i++) {
-		process.stdout.write(String(i % 10))
-	}
+function writeFullWidth(even, adjust) {
+	return async function (t) {
+		await delay(200);
+		var len = Math[even ? 'floor' : 'ceil']((process.stdout.columns + adjust) / 2);
+		for (var i = 0; i < len; i++) {
+			process.stdout.write(String(i % 10));
+			await delay(1);
+		}
+		await delay(200);
+		t.pass();
+	};
 }
 
-test.serial(t=>{writeline(),t.pass()});
-test.serial(t=>{writeline(),t.pass()});
+test.serial(writeFullWidth(true, 0));
+test.serial(writeFullWidth(false, 0));
+test.serial(writeFullWidth(true, 1));
+test.serial(writeFullWidth(false, 1));
+test.serial(writeFullWidth(true, -2));
+test.serial(writeFullWidth(false, -2));
+test.serial(writeFullWidth(true, 1));
+test.serial(writeFullWidth(false, 1));
+test.serial(writeFullWidth(true, 0));
+test.serial(writeFullWidth(false, 0));
+test.serial(writeFullWidth(true, 0));
+test.serial(writeFullWidth(false, 0));