juce_core: Add tests and fix some bugs with Objective C helper functions

examples/DemoRunner/Builds/Android/app/CMakeLists.txt

@@ -1086,6 +1086,7 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_core/native/juce_Network_mac.mm"
     "../../../../../modules/juce_core/native/juce_Network_windows.cpp"
     "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac.h"
+    "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac_test.mm"
     "../../../../../modules/juce_core/native/juce_PlatformTimer_generic.cpp"
     "../../../../../modules/juce_core/native/juce_PlatformTimer_windows.cpp"
     "../../../../../modules/juce_core/native/juce_PlatformTimerListener.h"
@@ -3154,6 +3155,7 @@ set_source_files_properties(
     "../../../../../modules/juce_core/native/juce_Network_mac.mm"
     "../../../../../modules/juce_core/native/juce_Network_windows.cpp"
     "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac.h"
+    "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac_test.mm"
     "../../../../../modules/juce_core/native/juce_PlatformTimer_generic.cpp"
     "../../../../../modules/juce_core/native/juce_PlatformTimer_windows.cpp"
     "../../../../../modules/juce_core/native/juce_PlatformTimerListener.h"

examples/DemoRunner/Builds/VisualStudio2017/DemoRunner_App.vcxproj.filters

@@ -2017,6 +2017,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac_test.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_generic.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>

examples/DemoRunner/Builds/VisualStudio2019/DemoRunner_App.vcxproj.filters

@@ -2017,6 +2017,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac_test.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_generic.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>

examples/DemoRunner/Builds/VisualStudio2022/DemoRunner_App.vcxproj.filters

@@ -2017,6 +2017,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac_test.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_generic.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>

extras/AudioPerformanceTest/Builds/Android/app/CMakeLists.txt

@@ -962,6 +962,7 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_core/native/juce_Network_mac.mm"
     "../../../../../modules/juce_core/native/juce_Network_windows.cpp"
     "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac.h"
+    "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac_test.mm"
     "../../../../../modules/juce_core/native/juce_PlatformTimer_generic.cpp"
     "../../../../../modules/juce_core/native/juce_PlatformTimer_windows.cpp"
     "../../../../../modules/juce_core/native/juce_PlatformTimerListener.h"
@@ -2730,6 +2731,7 @@ set_source_files_properties(
     "../../../../../modules/juce_core/native/juce_Network_mac.mm"
     "../../../../../modules/juce_core/native/juce_Network_windows.cpp"
     "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac.h"
+    "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac_test.mm"
     "../../../../../modules/juce_core/native/juce_PlatformTimer_generic.cpp"
     "../../../../../modules/juce_core/native/juce_PlatformTimer_windows.cpp"
     "../../../../../modules/juce_core/native/juce_PlatformTimerListener.h"

extras/AudioPerformanceTest/Builds/VisualStudio2022/AudioPerformanceTest_App.vcxproj.filters

@@ -1726,6 +1726,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac_test.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_generic.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>

extras/AudioPluginHost/Builds/Android/app/CMakeLists.txt

@@ -995,6 +995,7 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_core/native/juce_Network_mac.mm"
     "../../../../../modules/juce_core/native/juce_Network_windows.cpp"
     "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac.h"
+    "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac_test.mm"
     "../../../../../modules/juce_core/native/juce_PlatformTimer_generic.cpp"
     "../../../../../modules/juce_core/native/juce_PlatformTimer_windows.cpp"
     "../../../../../modules/juce_core/native/juce_PlatformTimerListener.h"
@@ -2916,6 +2917,7 @@ set_source_files_properties(
     "../../../../../modules/juce_core/native/juce_Network_mac.mm"
     "../../../../../modules/juce_core/native/juce_Network_windows.cpp"
     "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac.h"
+    "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac_test.mm"
     "../../../../../modules/juce_core/native/juce_PlatformTimer_generic.cpp"
     "../../../../../modules/juce_core/native/juce_PlatformTimer_windows.cpp"
     "../../../../../modules/juce_core/native/juce_PlatformTimerListener.h"

extras/AudioPluginHost/Builds/VisualStudio2017/AudioPluginHost_App.vcxproj.filters

@@ -1801,6 +1801,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac_test.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_generic.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>

extras/AudioPluginHost/Builds/VisualStudio2019/AudioPluginHost_App.vcxproj.filters

@@ -1801,6 +1801,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac_test.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_generic.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>

extras/AudioPluginHost/Builds/VisualStudio2022/AudioPluginHost_App.vcxproj.filters

@@ -1801,6 +1801,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac_test.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_generic.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>

extras/BinaryBuilder/Builds/VisualStudio2022/BinaryBuilder_ConsoleApp.vcxproj.filters

@@ -247,6 +247,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac_test.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_generic.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>

extras/NetworkGraphicsDemo/Builds/Android/app/CMakeLists.txt

@@ -966,6 +966,7 @@ add_library( ${BINARY_NAME}
     "../../../../../modules/juce_core/native/juce_Network_mac.mm"
     "../../../../../modules/juce_core/native/juce_Network_windows.cpp"
     "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac.h"
+    "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac_test.mm"
     "../../../../../modules/juce_core/native/juce_PlatformTimer_generic.cpp"
     "../../../../../modules/juce_core/native/juce_PlatformTimer_windows.cpp"
     "../../../../../modules/juce_core/native/juce_PlatformTimerListener.h"
@@ -2814,6 +2815,7 @@ set_source_files_properties(
     "../../../../../modules/juce_core/native/juce_Network_mac.mm"
     "../../../../../modules/juce_core/native/juce_Network_windows.cpp"
     "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac.h"
+    "../../../../../modules/juce_core/native/juce_ObjCHelpers_mac_test.mm"
     "../../../../../modules/juce_core/native/juce_PlatformTimer_generic.cpp"
     "../../../../../modules/juce_core/native/juce_PlatformTimer_windows.cpp"
     "../../../../../modules/juce_core/native/juce_PlatformTimerListener.h"

extras/NetworkGraphicsDemo/Builds/VisualStudio2022/NetworkGraphicsDemo_App.vcxproj.filters

@@ -1756,6 +1756,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac_test.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_generic.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>

extras/Projucer/Builds/VisualStudio2017/Projucer_App.vcxproj.filters

@@ -724,6 +724,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac_test.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_generic.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>

extras/Projucer/Builds/VisualStudio2019/Projucer_App.vcxproj.filters

@@ -724,6 +724,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac_test.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_generic.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>

extras/Projucer/Builds/VisualStudio2022/Projucer_App.vcxproj.filters

@@ -724,6 +724,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac_test.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_generic.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>

extras/UnitTestRunner/Builds/VisualStudio2017/UnitTestRunner_ConsoleApp.vcxproj.filters

@@ -1813,6 +1813,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac_test.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_generic.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>

extras/UnitTestRunner/Builds/VisualStudio2019/UnitTestRunner_ConsoleApp.vcxproj.filters

@@ -1813,6 +1813,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac_test.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_generic.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>

extras/UnitTestRunner/Builds/VisualStudio2022/UnitTestRunner_ConsoleApp.vcxproj.filters

@@ -1813,6 +1813,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac_test.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_generic.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>

extras/WindowsDLL/Builds/VisualStudio2022/WindowsDLL_StaticLibrary.vcxproj.filters

@@ -1753,6 +1753,9 @@
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_Network_windows.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>
+    <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_ObjCHelpers_mac_test.mm">
+      <Filter>JUCE Modules\juce_core\native</Filter>
+    </ClCompile>
     <ClCompile Include="..\..\..\..\modules\juce_core\native\juce_PlatformTimer_generic.cpp">
       <Filter>JUCE Modules\juce_core\native</Filter>
     </ClCompile>

modules/juce_core/juce_core.cpp

@@ -283,6 +283,9 @@
  #include "misc/juce_EnumHelpers_test.cpp"
  #include "containers/juce_FixedSizeFunction_test.cpp"
  #include "javascript/juce_JSONSerialisation_test.cpp"
+ #if JUCE_MAC || JUCE_IOS
+  #include "native/juce_ObjCHelpers_mac_test.mm"
+ #endif
 #endif
 
 //==============================================================================

modules/juce_core/native/juce_ObjCHelpers_mac.h

@@ -76,127 +76,62 @@ inline NSURL* createNSURLFromFile (const File& f)
 
 inline NSArray* createNSArrayFromStringArray (const StringArray& strings)
 {
-    auto array = [[NSMutableArray alloc] init];
+    auto array = [[NSMutableArray alloc] initWithCapacity: (NSUInteger) strings.size()];
 
-    for (auto string: strings)
+    for (const auto& string: strings)
-        [array addObject:juceStringToNS (string)];
+        [array addObject: juceStringToNS (string)];
 
     return [array autorelease];
 }
 
-inline NSArray* varArrayToNSArray (const var& varToParse);
+inline NSData* varToJsonData (const var& varToParse)
+{
+    return [juceStringToNS (JSON::toString (varToParse)) dataUsingEncoding: NSUTF8StringEncoding];
+}
+
+inline var jsonDataToVar (NSData* jsonData)
+{
+    auto* jsonString = [[NSString alloc] initWithData: jsonData
+                                             encoding: NSUTF8StringEncoding];
+
+    jassert (jsonString != nullptr);
+    return JSON::parse (nsStringToJuce ([jsonString autorelease]));
+}
 
 inline NSDictionary* varObjectToNSDictionary (const var& varToParse)
 {
-    auto dictionary = [NSMutableDictionary dictionary];
+    jassert (varToParse.isObject());
 
-    if (varToParse.isObject())
+    if (! varToParse.isObject())
-    {
+        return nullptr;
-        auto* dynamicObject = varToParse.getDynamicObject();
 
-        auto& properties = dynamicObject->getProperties();
+    NSError* error { nullptr };
+    NSDictionary* dictionary = [NSJSONSerialization JSONObjectWithData: varToJsonData (varToParse)
+                                                               options: NSJSONReadingMutableContainers
+                                                                 error: &error];
 
-        for (int i = 0; i < properties.size(); ++i)
+    jassert (error == nullptr);
-        {
+    jassert (dictionary != nullptr);
-            auto* keyString = juceStringToNS (properties.getName (i).toString());
-
-            const var& valueVar = properties.getValueAt (i);
-
-            if (valueVar.isObject())
-            {
-                auto* valueDictionary = varObjectToNSDictionary (valueVar);
-
-                [dictionary setObject: valueDictionary forKey: keyString];
-            }
-            else if (valueVar.isArray())
-            {
-                auto* valueArray = varArrayToNSArray (valueVar);
-
-                [dictionary setObject: valueArray forKey: keyString];
-            }
-            else
-            {
-                auto* valueString = juceStringToNS (valueVar.toString());
-
-                [dictionary setObject: valueString forKey: keyString];
-            }
-        }
-    }
 
     return dictionary;
 }
 
-inline NSArray* varArrayToNSArray (const var& varToParse)
+inline NSData* jsonObjectToData (const NSObject* jsonObject)
 {
-    jassert (varToParse.isArray());
+    NSError* error { nullptr };
+    auto* jsonData = [NSJSONSerialization dataWithJSONObject: jsonObject
+                                                     options: 0
+                                                       error: &error];
 
-    if (! varToParse.isArray())
+    jassert (error == nullptr);
-        return nil;
+    jassert (jsonData != nullptr);
 
-    const auto* varArray = varToParse.getArray();
+    return jsonData;
-
-    auto array = [NSMutableArray arrayWithCapacity: (NSUInteger) varArray->size()];
-
-    for (const auto& aVar : *varArray)
-    {
-        if (aVar.isObject())
-        {
-            auto* valueDictionary = varObjectToNSDictionary (aVar);
-
-            [array addObject: valueDictionary];
-        }
-        else if (aVar.isArray())
-        {
-            auto* valueArray = varArrayToNSArray (aVar);
-
-            [array addObject: valueArray];
-        }
-        else
-        {
-            auto* valueString = juceStringToNS (aVar.toString());
-
-            [array addObject: valueString];
-        }
-    }
-
-    return array;
 }
 
-var nsObjectToVar (NSObject* array);
-
 inline var nsDictionaryToVar (NSDictionary* dictionary)
 {
-    DynamicObject::Ptr dynamicObject (new DynamicObject());
+    return jsonDataToVar (jsonObjectToData (dictionary));
-
-    for (NSString* key in dictionary)
-        dynamicObject->setProperty (nsStringToJuce (key), nsObjectToVar ([dictionary objectForKey: key]));
-
-    return var (dynamicObject.get());
-}
-
-inline var nsArrayToVar (NSArray* array)
-{
-    Array<var> resultArray;
-
-    for (id value in array)
-        resultArray.add (nsObjectToVar (value));
-
-    return var (resultArray);
-}
-
-inline var nsObjectToVar (NSObject* obj)
-{
-    if ([obj isKindOfClass: [NSString class]])          return nsStringToJuce ((NSString*) obj);
-    else if ([obj isKindOfClass: [NSNumber class]])     return nsStringToJuce ([(NSNumber*) obj stringValue]);
-    else if ([obj isKindOfClass: [NSDictionary class]]) return nsDictionaryToVar ((NSDictionary*) obj);
-    else if ([obj isKindOfClass: [NSArray class]])      return nsArrayToVar ((NSArray*) obj);
-    else
-    {
-        // Unsupported yet, add here!
-        jassertfalse;
-    }
-
-    return {};
 }
 
 #if JUCE_MAC

modules/juce_core/native/juce_ObjCHelpers_mac_test.mm

@@ -0,0 +1,70 @@
+namespace juce {
+
+class ObjCHelpersTest final : public UnitTest {
+public:
+  ObjCHelpersTest() : UnitTest{"ObjCHelpers", UnitTestCategories::native} {}
+
+  void runTest() final {
+    beginTest("Range");
+    {
+      constexpr auto start = 10;
+      constexpr auto length = 20;
+
+      const auto juceRange = Range<int>::withStartAndLength(start, length);
+      const auto nsRange = NSMakeRange(start, length);
+
+      expect(nsRangeToJuce(nsRange) == juceRange);
+      expect(NSEqualRanges(nsRange, juceRangeToNS(juceRange)));
+    }
+
+    beginTest("String");
+    {
+      String juceString{"Hello world!"};
+      NSString *nsString{@"Hello world!"};
+
+      expect(nsStringToJuce(nsString) == juceString);
+      expect([nsString isEqualToString:juceStringToNS(juceString)]);
+      expect([nsString isEqualToString:nsStringLiteral("Hello world!")]);
+    }
+
+    beginTest("StringArray");
+    {
+      const StringArray stringArray{"Hello world!", "this", "is", "a", "test"};
+      NSArray *nsArray { @[ @"Hello world!", @"this", @"is", @"a", @"test" ] };
+
+      expect(
+          [nsArray isEqualToArray:createNSArrayFromStringArray(stringArray)]);
+    }
+
+    beginTest("Dictionary");
+    {
+      DynamicObject::Ptr data{new DynamicObject()};
+      data->setProperty("integer", 1);
+      data->setProperty("double", 2.3);
+      data->setProperty("boolean", true);
+      data->setProperty("string", "Hello world!");
+
+      Array<var> array{45, 67.8, true, "Hello array!"};
+      data->setProperty("array", array);
+
+      auto *nsDictionary = varObjectToNSDictionary(data.get());
+      auto clone = nsDictionaryToVar(nsDictionary);
+
+      expect(clone.getProperty("integer", {}).isInt());
+      expect(clone.getProperty("double", {}).isDouble());
+      expect(clone.getProperty("boolean", {}).isBool());
+      expect(clone.getProperty("string", {}).isString());
+      expect(clone.getProperty("array", {}).isArray());
+
+      expect(clone.getProperty("integer", {}) == var{1});
+      expect(clone.getProperty("double", {}) == var{2.3});
+      expect(clone.getProperty("boolean", {}) == var{true});
+      expect(clone.getProperty("string", {}) == var{"Hello world!"});
+      expect(clone.getProperty("array", {}) == array);
+    }
+  }
+};
+
+static ObjCHelpersTest objCHelpersTest;
+
+} // namespace juce

modules/juce_core/unit_tests/juce_UnitTestCategories.h

@@ -40,6 +40,7 @@ namespace UnitTestCategories
     static const String json                       { "JSON" };
     static const String maths                      { "Maths" };
     static const String midi                       { "MIDI" };
+    static const String native                     { "Native" };
     static const String networking                 { "Networking" };
     static const String osc                        { "OSC" };
     static const String smoothedValues             { "SmoothedValues" };