Fix ProgressBar to correctly clear multi-line formats

Author: rtek

Helper/ProgressBar.php

@@ -482,8 +482,10 @@ private function overwrite(string $message): void
                     }
                     $this->output->clear($lineCount);
                 } else {
-                    if ($this->formatLineCount > 0) {
-                        $this->cursor->moveUp($this->formatLineCount);
+                    for ($i = 0; $i < $this->formatLineCount; ++$i) {
+                        $this->cursor->moveToColumn(1);
+                        $this->cursor->clearLine();
+                        $this->cursor->moveUp();
                     }
 
                     $this->cursor->moveToColumn(1);

Tests/Helper/ProgressBarTest.php

@@ -812,7 +812,7 @@ public function testMultilineFormat()
         $this->assertEquals(
             ">---------------------------\nfoobar".
             $this->generateOutput("=========>------------------\nfoobar").
-            "\x1B[1A\x1B[1G\x1B[2K".
+            "\x1B[1G\x1B[2K\x1B[1A\x1B[1G\x1B[2K".
             $this->generateOutput("============================\nfoobar"),
             stream_get_contents($output->getStream())
         );
@@ -983,7 +983,7 @@ protected function generateOutput($expected)
     {
         $count = substr_count($expected, "\n");
 
-        return ($count ? sprintf("\x1B[%dA\x1B[1G\x1b[2K", $count) : "\x1B[1G\x1B[2K").$expected;
+        return ($count ? str_repeat("\x1B[1G\x1b[2K\x1B[1A", $count) : '')."\x1B[1G\x1B[2K".$expected;
     }
 
     public function testBarWidthWithMultilineFormat()
@@ -1095,4 +1095,33 @@ public function testNoWriteWhenMessageIsSame()
             stream_get_contents($output->getStream())
         );
     }
+
+    public function testMultiLineFormatIsFullyCleared()
+    {
+        $bar = new ProgressBar($output = $this->getOutputStream(), 3);
+        $bar->setFormat("%current%/%max%\n%message%\nFoo");
+
+        $bar->setMessage('1234567890');
+        $bar->start();
+        $bar->display();
+
+        $bar->setMessage('ABC');
+        $bar->advance();
+        $bar->display();
+
+        $bar->setMessage('A');
+        $bar->advance();
+        $bar->display();
+
+        $bar->finish();
+
+        rewind($output->getStream());
+        $this->assertEquals(
+            "0/3\n1234567890\nFoo".
+            $this->generateOutput("1/3\nABC\nFoo").
+            $this->generateOutput("2/3\nA\nFoo").
+            $this->generateOutput("3/3\nA\nFoo"),
+            stream_get_contents($output->getStream())
+        );
+    }
 }