Add a simple unit test for wxParseCommonDialogsFilter().

Verify that this function (which is used for parsing the wildcard strings used
with file-related dialogs) works as expected and also asserts when given
invalid input.

See #4489.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67585 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/misc/guifuncs.cpp

@@ -19,6 +19,7 @@
 
 #ifndef WX_PRECOMP
     #include "wx/gdicmn.h"
+    #include "wx/filefn.h"
 #endif // !PCH
 
 #include "wx/defs.h"
@@ -38,10 +39,12 @@ private:
     CPPUNIT_TEST_SUITE( MiscGUIFuncsTestCase );
         CPPUNIT_TEST( DisplaySize );
         CPPUNIT_TEST( URLDataObject );
+        CPPUNIT_TEST( ParseFileDialogFilter );
     CPPUNIT_TEST_SUITE_END();
 
     void DisplaySize();
     void URLDataObject();
+    void ParseFileDialogFilter();
 
     DECLARE_NO_COPY_CLASS(MiscGUIFuncsTestCase)
 };
@@ -88,3 +91,41 @@ void MiscGUIFuncsTestCase::URLDataObject()
     wxTheClipboard->Flush();
 }
 
+void MiscGUIFuncsTestCase::ParseFileDialogFilter()
+{
+    wxArrayString descs,
+                  filters;
+
+    CPPUNIT_ASSERT_EQUAL
+    (
+        1,
+        wxParseCommonDialogsFilter("Image files|*.jpg;*.png", descs, filters)
+    );
+
+    CPPUNIT_ASSERT_EQUAL( "Image files", descs[0] );
+    CPPUNIT_ASSERT_EQUAL( "*.jpg;*.png", filters[0] );
+
+    CPPUNIT_ASSERT_EQUAL
+    (
+        2,
+        wxParseCommonDialogsFilter
+        (
+            "All files (*.*)|*.*|Python source (*.py)|*.py",
+            descs, filters
+        )
+    );
+
+    CPPUNIT_ASSERT_EQUAL( "*.*", filters[0] );
+    CPPUNIT_ASSERT_EQUAL( "*.py", filters[1] );
+
+    // Test some invalid ones too.
+    WX_ASSERT_FAILS_WITH_ASSERT
+    (
+        wxParseCommonDialogsFilter
+        (
+            "All files (*.*)|*.*|Python source (*.py)|*.py|",
+            descs, filters
+        )
+    );
+}
+