Add unit tests for wxDecToHex()

tests/strings/hexconv.cpp

@@ -0,0 +1,104 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        tests/strings/hexconv.cpp
+// Purpose:     wxDecToHex unit test
+// Author:      Artur Wieczorek
+// Created:     2017-02-23
+// Copyright:   (c) 2017 wxWidgets development team
+///////////////////////////////////////////////////////////////////////////////
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+#include "testprec.h"
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+#include "wx/utils.h"
+
+// ----------------------------------------------------------------------------
+// test class
+// ----------------------------------------------------------------------------
+
+class HexConvTestCase : public CppUnit::TestCase
+{
+public:
+    HexConvTestCase() {}
+
+private:
+    CPPUNIT_TEST_SUITE( HexConvTestCase );
+        CPPUNIT_TEST( DecToHex1 ); // Conversion to wxString
+        CPPUNIT_TEST( DecToHex2 ); // Conversion to wxChar string
+        CPPUNIT_TEST( DecToHex3 ); // Conversion to 2 characters
+    CPPUNIT_TEST_SUITE_END();
+
+    void DecToHex1();
+    void DecToHex2();
+    void DecToHex3();
+
+    wxDECLARE_NO_COPY_CLASS(HexConvTestCase);
+};
+
+// register in the unnamed registry so that these tests are run by default
+CPPUNIT_TEST_SUITE_REGISTRATION( HexConvTestCase );
+
+// also include in its own registry so that these tests can be run alone
+CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( HexConvTestCase, "HexConvTestCase" );
+
+// ----------------------------------------------------------------------------
+// tests themselves
+// ----------------------------------------------------------------------------
+
+void HexConvTestCase::DecToHex1()
+{
+    // Conversion to wxString
+    for ( int i = 0; i < 256; i++ )
+    {
+        char szHexStrRef[16];
+        sprintf(szHexStrRef, "%02X", i);
+        wxString hexStrRef = wxString(szHexStrRef);
+
+        wxString hexStr = wxDecToHex(i);
+
+        CPPUNIT_ASSERT_EQUAL( hexStr, hexStrRef );
+    }
+}
+
+void HexConvTestCase::DecToHex2()
+{
+    // Conversion to wxChar string
+    for ( int i = 0; i < 256; i++ )
+    {
+        char szHexStrRef[16];
+        sprintf(szHexStrRef, "%02X", i);
+
+        wxChar hexStr[4];
+        memset(hexStr, 0xFF, sizeof(hexStr));
+        wxChar c3 = hexStr[3]; // This character should remain untouched
+        wxDecToHex(i, hexStr);
+
+        CPPUNIT_ASSERT_EQUAL( hexStr[0], (wxChar)szHexStrRef[0] );
+        CPPUNIT_ASSERT_EQUAL( hexStr[1], (wxChar)szHexStrRef[1] );
+        CPPUNIT_ASSERT_EQUAL( hexStr[2], wxS('\0') );
+        CPPUNIT_ASSERT_EQUAL( hexStr[3], c3 );
+    }
+}
+
+void HexConvTestCase::DecToHex3()
+{
+    // Conversion to 2 characters
+    for ( int i = 0; i < 256; i++ )
+    {
+        char szHexStrRef[16];
+        sprintf(szHexStrRef, "%02X", i);
+
+        char c1 = '\xFF';
+        char c2 = '\xFF';
+        wxDecToHex(i, &c1, &c2);
+
+        CPPUNIT_ASSERT_EQUAL( c1, szHexStrRef[0] );
+        CPPUNIT_ASSERT_EQUAL( c2, szHexStrRef[1] );
+    }
+}