Make attribute-write yaml tests play nicer with complex types.

examples/chip-tool/templates/partials/test_cluster.zapt

@@ -142,18 +142,8 @@ class {{filename}}: public TestCommand
         {{#if async}}ReturnErrorOnFailure({{else}}return {{/if}}cluster.InvokeCommand<requestType, responseType>(request, this, success, failure){{#if async}}){{/if}};
         {{else}}
         {{#chip_tests_item_parameters}}
-        {{chipType}} {{asLowerCamelCase name}}Argument =
-          {{#if (isOctetString type)}}
-            chip::ByteSpan(chip::Uint8::from_const_char("{{definedValue}}"), strlen("{{definedValue}}"))
-          {{else if (isCharString type)}}
-            chip::CharSpan("{{definedValue}}", strlen("{{definedValue}}"))
-          {{else}}
-            {{#if_chip_enum type}}
-              static_cast<{{chipType}}>({{definedValue}}{{asTypeLiteralSuffix type}})
-            {{else}}
-              {{definedValue}}{{asTypeLiteralSuffix type}}
-            {{/if_chip_enum}}
-          {{/if}};
+        {{zapTypeToEncodableClusterObjectType type ns=parent.cluster}} {{asLowerCamelCase name}}Argument;
+        {{>commandValue ns=parent.cluster ignore=true container=(concat (asLowerCamelCase name) "Argument") definedValue=definedValue}}
         {{/chip_tests_item_parameters}}
 
         {{~#*inline "commandName"}}{{asUpperCamelCase commandName}}{{#if isAttribute}}Attribute{{asUpperCamelCase attribute}}{{/if}}{{/inline}}

src/app/zap-templates/common/ClusterTestGeneration.js

@@ -474,8 +474,8 @@ function chip_tests_item_parameters(options)
   const promise = assertCommandOrAttribute(this).then(item => {
     if (this.isAttribute && !this.isWriteAttribute) {
       if (this.isSubscribeAttribute) {
-        const minInterval = { name : 'minInterval', type : 'in16u', chipType : 'uint16_t', definedValue : this.minInterval };
-        const maxInterval = { name : 'maxInterval', type : 'in16u', chipType : 'uint16_t', definedValue : this.maxInterval };
+        const minInterval = { name : 'minInterval', type : 'int16u', chipType : 'uint16_t', definedValue : this.minInterval };
+        const maxInterval = { name : 'maxInterval', type : 'int16u', chipType : 'uint16_t', definedValue : this.maxInterval };
         return [ minInterval, maxInterval ];
       }
       return [];

src/app/zap-templates/common/ClustersHelper.js

@@ -448,8 +448,11 @@ function enhancedAttributes(attributes, globalAttributes, types)
       type : attribute.type,
       size : attribute.size,
       isList : attribute.isList,
+      isArray : attribute.isList,
+      isNullable : attribute.isNullable,
       chipType : attribute.chipType,
-      chipCallback : attribute.chipCallback
+      chipCallback : attribute.chipCallback,
+      label : attribute.name,
     };
     attribute.arguments = [ argument ];
     attribute.response  = { arguments : [ argument ] };