minor symfony#46717 [Yaml] Enhance coverage in yaml DumperTest. (donquixote)

This PR was submitted for the 6.2 branch but it was squashed and merged into the 4.4 branch instead.

Discussion
----------

[Yaml] Enhance coverage in yaml DumperTest.

| Q             | A
| ------------- | ---
| Branch?       | 6.1 or 6.2 TBD
| Bug fix?      | no/TBD - it increases test coverage. Not really a bug, but also not a feature.
| New feature?  | no
| Deprecations? | no
| Tickets       | Fix symfony#46716
| License       | MIT
| Doc PR        | -

Currently the following mutation in Yaml would not cause test fail:

```diff
diff --git a/Dumper.php b/Dumper.php
index 56979c7..39dc925 100644
--- a/Dumper.php
+++ b/Dumper.php
@@ -124,6 +124,10 @@ public function dump(mixed $input, int $inline = 0, int $indent = 0, int $flags

                 $willBeInlined = $inline - 1 <= 0 || !\is_array($value) && $dumpObjectAsInlineMap || empty($value);

+                if (!$willBeInlined && !$dumpAsMap) {
+                  ++$indent;
+                }
+
                 $output .= sprintf('%s%s%s%s',
                     $prefix,
                     $dumpAsMap ? Inline::dump($key, $flags).':' : '-',
```

Commits
-------

c5834be [Yaml] Enhance coverage in yaml DumperTest.

Author: xabbuh

src/Symfony/Component/Yaml/Tests/DumperTest.php

@@ -28,7 +28,7 @@ class DumperTest extends TestCase
         '' => 'bar',
         'foo' => '#bar',
         'foo\'bar' => [],
-        'bar' => [1, 'foo'],
+        'bar' => [1, 'foo', ['a' => 'A']],
         'foobar' => [
             'foo' => 'bar',
             'bar' => [1, 'foo'],
@@ -64,6 +64,8 @@ public function testIndentationInConstructor()
 bar:
        - 1
        - foo
+       -
+              a: A
 foobar:
        foo: bar
        bar:
@@ -107,7 +109,7 @@ public function testSpecifications()
     public function testInlineLevel()
     {
         $expected = <<<'EOF'
-{ '': bar, foo: '#bar', 'foo''bar': {  }, bar: [1, foo], foobar: { foo: bar, bar: [1, foo], foobar: { foo: bar, bar: [1, foo] } } }
+{ '': bar, foo: '#bar', 'foo''bar': {  }, bar: [1, foo, { a: A }], foobar: { foo: bar, bar: [1, foo], foobar: { foo: bar, bar: [1, foo] } } }
 EOF;
         $this->assertEquals($expected, $this->dumper->dump($this->array, -10), '->dump() takes an inline level argument');
         $this->assertEquals($expected, $this->dumper->dump($this->array, 0), '->dump() takes an inline level argument');
@@ -116,7 +118,7 @@ public function testInlineLevel()
 '': bar
 foo: '#bar'
 'foo''bar': {  }
-bar: [1, foo]
+bar: [1, foo, { a: A }]
 foobar: { foo: bar, bar: [1, foo], foobar: { foo: bar, bar: [1, foo] } }
 
 EOF;
@@ -129,6 +131,7 @@ public function testInlineLevel()
 bar:
     - 1
     - foo
+    - { a: A }
 foobar:
     foo: bar
     bar: [1, foo]
@@ -144,6 +147,8 @@ public function testInlineLevel()
 bar:
     - 1
     - foo
+    -
+        a: A
 foobar:
     foo: bar
     bar:
@@ -163,6 +168,8 @@ public function testInlineLevel()
 bar:
     - 1
     - foo
+    -
+        a: A
 foobar:
     foo: bar
     bar:
@@ -379,8 +386,9 @@ public function testDumpingTaggedValueSequenceRespectsInlineLevel()
             new TaggedValue('user', [
                 'username' => 'jane',
             ]),
-            new TaggedValue('user', [
-                'username' => 'john',
+            new TaggedValue('names', [
+                'john',
+                'claire',
             ]),
         ];
 
@@ -389,8 +397,9 @@ public function testDumpingTaggedValueSequenceRespectsInlineLevel()
         $expected = <<<YAML
 - !user
   username: jane
-- !user
-  username: john
+- !names
+  - john
+  - claire
 
 YAML;
         $this->assertSame($expected, $yaml);
@@ -402,16 +411,17 @@ public function testDumpingTaggedValueSequenceWithInlinedTagValues()
             new TaggedValue('user', [
                 'username' => 'jane',
             ]),
-            new TaggedValue('user', [
-                'username' => 'john',
+            new TaggedValue('names', [
+                'john',
+                'claire',
             ]),
         ];
 
         $yaml = $this->dumper->dump($data, 1);
 
         $expected = <<<YAML
 - !user { username: jane }
-- !user { username: john }
+- !names [john, claire]
 
 YAML;
         $this->assertSame($expected, $yaml);
@@ -423,8 +433,9 @@ public function testDumpingTaggedValueMapRespectsInlineLevel()
             'user1' => new TaggedValue('user', [
                 'username' => 'jane',
             ]),
-            'user2' => new TaggedValue('user', [
-                'username' => 'john',
+            'names1' => new TaggedValue('names', [
+                'john',
+                'claire',
             ]),
         ];
 
@@ -433,8 +444,9 @@ public function testDumpingTaggedValueMapRespectsInlineLevel()
         $expected = <<<YAML
 user1: !user
     username: jane
-user2: !user
-    username: john
+names1: !names
+    - john
+    - claire
 
 YAML;
         $this->assertSame($expected, $yaml);
@@ -446,16 +458,17 @@ public function testDumpingTaggedValueMapWithInlinedTagValues()
             'user1' => new TaggedValue('user', [
                 'username' => 'jane',
             ]),
-            'user2' => new TaggedValue('user', [
-                'username' => 'john',
+            'names1' => new TaggedValue('names', [
+                'john',
+                'claire',
             ]),
         ];
 
         $yaml = $this->dumper->dump($data, 1);
 
         $expected = <<<YAML
 user1: !user { username: jane }
-user2: !user { username: john }
+names1: !names [john, claire]
 
 YAML;
         $this->assertSame($expected, $yaml);