feature #21653 [VarDumper] Added a way to print or not comma separator and/or trailing comma (lyrixx)

This PR was merged into the 3.3-dev branch.

Discussion
----------

[VarDumper] Added a way to print or not comma separator and/or trailing comma

| Q             | A
| ------------- | ---
| Branch?       | master
| Bug fix?      | no
| New feature?  | yes
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | -
| License       | MIT
| Doc PR        | -

---

Usecase: Be able to display a dump on one line.
It's already used in the following projets: https://github.com/bobthecow/psysh/blob/master/src/Psy/VarDumper/Dumper.php#L93-L95

Commits
-------

1ef0751 [VarDumper] Added a way to print or not comma separator and/or trailing comma

Author: fabpot

src/Symfony/Component/VarDumper/Dumper/AbstractDumper.php

@@ -23,6 +23,8 @@ abstract class AbstractDumper implements DataDumperInterface, DumperInterface
 {
     const DUMP_LIGHT_ARRAY = 1;
     const DUMP_STRING_LENGTH = 2;
+    const DUMP_COMMA_SEPARATOR = 4;
+    const DUMP_TRAILING_COMMA = 8;
 
     public static $defaultOutput = 'php://output';
 

src/Symfony/Component/VarDumper/Dumper/CliDumper.php

@@ -155,7 +155,7 @@ public function dumpScalar(Cursor $cursor, $type, $value)
 
         $this->line .= $this->style($style, $value, $attr);
 
-        $this->dumpLine($cursor->depth, true);
+        $this->endValue($cursor);
     }
 
     /**
@@ -171,7 +171,7 @@ public function dumpString(Cursor $cursor, $str, $bin, $cut)
         }
         if ('' === $str) {
             $this->line .= '""';
-            $this->dumpLine($cursor->depth, true);
+            $this->endValue($cursor);
         } else {
             $attr += array(
                 'length' => 0 <= $cut ? mb_strlen($str, 'UTF-8') + $cut : 0,
@@ -237,7 +237,11 @@ public function dumpString(Cursor $cursor, $str, $bin, $cut)
                     $lineCut = 0;
                 }
 
-                $this->dumpLine($cursor->depth, $i > $m);
+                if ($i > $m) {
+                    $this->endValue($cursor);
+                } else {
+                    $this->dumpLine($cursor->depth);
+                }
             }
         }
     }
@@ -280,7 +284,7 @@ public function leaveHash(Cursor $cursor, $type, $class, $hasChild, $cut)
     {
         $this->dumpEllipsis($cursor, $hasChild, $cut);
         $this->line .= Cursor::HASH_OBJECT === $type ? '}' : (Cursor::HASH_RESOURCE !== $type ? ']' : ($hasChild ? '}' : ''));
-        $this->dumpLine($cursor->depth, true);
+        $this->endValue($cursor);
     }
 
     /**
@@ -486,4 +490,15 @@ protected function dumpLine($depth, $endOfValue = false)
         }
         parent::dumpLine($depth);
     }
+
+    protected function endValue(Cursor $cursor)
+    {
+        if (self::DUMP_TRAILING_COMMA & $this->flags && 0 < $cursor->depth) {
+            $this->line .= ',';
+        } elseif (self::DUMP_COMMA_SEPARATOR & $this->flags && 1 < $cursor->hashLength - $cursor->hashIndex) {
+            $this->line .= ',';
+        }
+
+        $this->dumpLine($cursor->depth, true);
+    }
 }

src/Symfony/Component/VarDumper/Tests/CliDumperTest.php

@@ -108,6 +108,67 @@ class: "Symfony\Component\VarDumper\Tests\CliDumperTest"
         );
     }
 
+    /**
+     * @dataProvider provideDumpWithCommaFlagTests
+     */
+    public function testDumpWithCommaFlag($expected, $flags)
+    {
+        $dumper = new CliDumper(null, null, $flags);
+        $dumper->setColors(false);
+        $cloner = new VarCloner();
+
+        $var = array(
+            'array' => array('a', 'b'),
+            'string' => 'hello',
+            'multiline string' => "this\nis\na\multiline\nstring",
+        );
+
+        $dump = $dumper->dump($cloner->cloneVar($var), true);
+
+        $this->assertSame($expected, $dump);
+    }
+
+    public function provideDumpWithCommaFlagTests()
+    {
+        $expected = <<<'EOTXT'
+array:3 [
+  "array" => array:2 [
+    0 => "a",
+    1 => "b"
+  ],
+  "string" => "hello",
+  "multiline string" => """
+    this\n
+    is\n
+    a\multiline\n
+    string
+    """
+]
+
+EOTXT;
+
+        yield array($expected, CliDumper::DUMP_COMMA_SEPARATOR);
+
+        $expected = <<<'EOTXT'
+array:3 [
+  "array" => array:2 [
+    0 => "a",
+    1 => "b",
+  ],
+  "string" => "hello",
+  "multiline string" => """
+    this\n
+    is\n
+    a\multiline\n
+    string
+    """,
+]
+
+EOTXT;
+
+        yield array($expected, CliDumper::DUMP_TRAILING_COMMA);
+    }
+
     /**
      * @requires extension xml
      */