minor #8207 add filter argument to assertDumpEquals() (xabbuh)

This PR was merged into the 3.4 branch.

Discussion
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add filter argument to assertDumpEquals()

This fixes #8172.

Commits
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671fa2c add filter argument to assertDumpEquals()

Author: javiereguiluz

components/var_dumper/advanced.rst

@@ -206,9 +206,17 @@ The output format of a dumper can be fine tuned by the two flags
 ``DUMP_STRING_LENGTH`` and ``DUMP_LIGHT_ARRAY`` which are passed as a bitmap
 in the third constructor argument. They can also be set via environment
 variables when using
-:method:`assertDumpEquals($dump, $data, $message) <Symfony\\Component\\VarDumper\\Test\\VarDumperTestTrait::assertDumpEquals>`
+:method:`assertDumpEquals($dump, $data, $filter, $message) <Symfony\\Component\\VarDumper\\Test\\VarDumperTestTrait::assertDumpEquals>`
 during unit testing.
 
+The ``$filter`` argument of ``assertDumpEquals()`` can be used to pass a
+bit field of ``Caster::EXCLUDE_*`` constants and influences the expected
+output produced by the different casters.
+
+.. versionadded:: 3.4
+    The ``$filter`` argument of ``assertDumpEquals()`` was introdcued in
+    Symfony 3.4.
+
 .. versionadded:: 3.1
     The ``DUMP_STRING_LENGTH`` and ``DUMP_LIGHT_ARRAY`` flags were introduced
     in Symfony 3.1.