Add support for null in yaml tests. (project-chip#11139)

Adds support for sending null as a command argument and for null in
the expected value.

examples/chip-tool/commands/tests/TestCommand.h

@@ -206,6 +206,30 @@ class TestCommand : public CHIPCommand
         return false;
     }
 
+    template <typename T>
+    bool CheckValueNull(const char * itemName, const chip::app::DataModel::Nullable<T> & value)
+    {
+        if (value.IsNull())
+        {
+            return true;
+        }
+
+        Exit(std::string(itemName) + " expected to be null but isn't");
+        return false;
+    }
+
+    template <typename T>
+    bool CheckValueNonNull(const char * itemName, const chip::app::DataModel::Nullable<T> & value)
+    {
+        if (!value.IsNull())
+        {
+            return true;
+        }
+
+        Exit(std::string(itemName) + " expected to not be null but is");
+        return false;
+    }
+
     chip::Callback::Callback<chip::Controller::OnDeviceConnected> mOnDeviceConnectedCallback;
     chip::Callback::Callback<chip::Controller::OnDeviceConnectionFailure> mOnDeviceConnectionFailureCallback;
 

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

@@ -172,18 +172,26 @@ class {{filename}}: public TestCommand
           {{/if}}
           {{#chip_tests_item_response_parameters}}
             {{~#*inline "item"}}{{asLowerCamelCase name}}{{#if isOptional}}.Value(){{/if}}{{/inline}}
+            {{~#*inline "itemValue"}}{{>item}}{{#if isNullable}}.Value(){{/if}}{{/inline}}
             {{#if hasExpectedValue}}
               {{#if isOptional}}
                 {{~#*inline "item"}}{{asLowerCamelCase name}}{{/inline}}
                 VerifyOrReturn(CheckValuePresent("{{> item}}", {{> item}}));
               {{/if}}
-              VerifyOrReturn(CheckValue
-                {{~#if isList}}AsListLength("{{>item}}", {{>item}}, {{expectedValue.length}})
-                {{else if isArray}}AsList("{{>item}}", {{>item}}, {{expectedValue}})
-                {{else if (isString type)}}AsString("{{>item}}", {{>item}}, "{{expectedValue}}")
-                {{else}}<{{chipType}}>("{{>item}}", {{>item}}, {{expectedValue}}{{asTypeLiteralSuffix type}})
+              {{#if (isLiteralNull expectedValue)}}
+                VerifyOrReturn(CheckValueNull("{{> item}}", {{> item}}));
+              {{else}}
+                {{#if isNullable}}
+                VerifyOrReturn(CheckValueNonNull("{{> item}}", {{> item}}));
                 {{/if}}
-              );
+                VerifyOrReturn(CheckValue
+                  {{~#if isList}}AsListLength("{{>itemValue}}", {{>itemValue}}, {{expectedValue.length}})
+                  {{else if isArray}}AsList("{{>itemValue}}", {{>itemValue}}, {{expectedValue}})
+                  {{else if (isString type)}}AsString("{{>itemValue}}", {{>itemValue}}, "{{expectedValue}}")
+                  {{else}}<{{chipType}}>("{{>itemValue}}", {{>itemValue}}, {{expectedValue}}{{asTypeLiteralSuffix type}})
+                  {{/if}}
+                );
+              {{/if}}
             {{/if}}
             {{#if hasExpectedConstraints}}
               {{#if isOptional}}

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

@@ -2,13 +2,17 @@
   {{#if ignore}}
     {{>commandValue ns=ns container=(concat container ".Emplace()") definedValue=definedValue type=type isOptional=false ignore=true}}
   {{else}}
-    {{>commandValue ns=ns container=(concat container "." label ".Emplace()") definedValue=definedValue type=type isOptional=false ignore=true}}
+    {{>commandValue ns=ns container=(concat container "." (asLowerCamelCase label) ".Emplace()") definedValue=definedValue type=type isOptional=false ignore=true}}
   {{/if}}
 {{else if isNullable}}
-  {{#if ignore}}
-    {{>commandValue ns=ns container=(concat container ".SetNonNull()") definedValue=definedValue type=type isNullable=false ignore=true}}
+  {{#if (isLiteralNull definedValue)}}
+    {{container}}{{#unless ignore}}.{{asLowerCamelCase label}}{{/unless}}.SetNull();
   {{else}}
-    {{>commandValue ns=ns container=(concat container "." label ".SetNonNull()") definedValue=definedValue type=type isNullable=false ignore=true}}
+    {{#if ignore}}
+      {{>commandValue ns=ns container=(concat container ".SetNonNull()") definedValue=definedValue type=type isNullable=false ignore=true}}
+    {{else}}
+      {{>commandValue ns=ns container=(concat container "." (asLowerCamelCase label) ".SetNonNull()") definedValue=definedValue type=type isNullable=false ignore=true}}
+    {{/if}}
   {{/if}}
 {{else if isArray}}
 
@@ -26,9 +30,9 @@
 
     {{#zcl_struct_items_by_struct_name type}}
       {{#if ../ignore}}
-      {{>commandValue ns=parent.ns container=(concat parent.container "." label) definedValue=(lookup parent.definedValue name) ignore=../ignore}}
+      {{>commandValue ns=parent.ns container=(concat parent.container "." (asLowerCamelCase label)) definedValue=(lookup parent.definedValue name) ignore=../ignore}}
       {{else}}
-      {{>commandValue ns=parent.ns container=(concat parent.container "." parent.label) definedValue=(lookup parent.definedValue name) ignore=../ignore}}
+      {{>commandValue ns=parent.ns container=(concat parent.container "." (asLowerCamelCase parent.label)) definedValue=(lookup parent.definedValue name) ignore=../ignore}}
       {{/if}}
     {{/zcl_struct_items_by_struct_name}}
 

src/app/clusters/test-cluster-server/test-cluster-server.cpp

@@ -444,6 +444,8 @@ bool emberAfTestClusterClusterTestNullableOptionalRequestCallback(
         {
             response.value.SetValue(commandData.arg1.Value().Value());
         }
+
+        response.originalValue.Emplace(commandData.arg1.Value());
     }
 
     CHIP_ERROR err = commandObj->AddResponseData(commandPath, response);

src/app/tests/suites/TestClusterComplexTypes.yaml

@@ -407,6 +407,8 @@ tests:
                 value: false
               - name: "value"
                 value: 5
+              - name: "originalValue"
+                value: 5
 
     - label: "Send Test Command without its optional arg."
       command: "testNullableOptionalRequest"
@@ -416,7 +418,6 @@ tests:
                 value: false
 
     - label: "Send Test Command with optional arg set to null."
-      disabled: true
       command: "testNullableOptionalRequest"
       arguments:
           values:
@@ -427,4 +428,6 @@ tests:
               - name: "wasPresent"
                 value: true
               - name: "wasNull"
-                value: false
+                value: true
+              - name: "originalValue"
+                value: null

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

@@ -42,6 +42,13 @@ const kResponseName      = 'response';
 const kDisabledName      = 'disabled';
 const kResponseErrorName = 'error';
 
+class NullObject {
+  toString()
+  {
+    return "YOU SHOULD HAVE CHECKED (isLiteralNull definedValue)"
+  }
+};
+
 function throwError(test, errorStr)
 {
   console.error('Error in: ' + test.filename + '.yaml for test with label: "' + test.label + '"\n');
@@ -417,6 +424,8 @@ function chip_tests_item_parameters(options)
             }
             value[key] = attachGlobal(global, value[key]);
           }
+        } else if (value === null) {
+          value = new NullObject();
         } else {
           switch (typeof value) {
           case 'number':
@@ -487,6 +496,13 @@ function chip_tests_item_response_parameters(options)
   return asBlocks.call(this, promise, options);
 }
 
+function isLiteralNull(value, options)
+{
+  // Literal null might look different depending on whether it went through
+  // attachGlobal or not.
+  return (value === null) || (value instanceof NullObject);
+}
+
 //
 // Module exports
 //
@@ -496,3 +512,4 @@ exports.chip_tests_item_parameters          = chip_tests_item_parameters;
 exports.chip_tests_item_response_type       = chip_tests_item_response_type;
 exports.chip_tests_item_response_parameters = chip_tests_item_response_parameters;
 exports.isTestOnlyCluster                   = isTestOnlyCluster;
+exports.isLiteralNull                       = isLiteralNull;

src/app/zap-templates/zcl/data-model/chip/test-cluster.xml

@@ -367,11 +367,13 @@ limitations under the License.
 
     <command source="server" code="0x06" name="TestNullableOptionalResponse" optional="false" disableDefaultResponse="true">
       <description>
-        Delivers information about the argument TestNullableOptionalRequest had.
+        Delivers information about the argument TestNullableOptionalRequest had,
+        and the original value if there was one.
       </description>
       <arg name="wasPresent" type="BOOLEAN"/>
       <arg name="wasNull" type="BOOLEAN" optional="true"/>
       <arg name="value" type="INT8U" optional="true"/>
+      <arg name="originalValue" type="INT8U" optional="true" isNullable="true"/>
     </command>
 
     <command source="server" code="0x07" name="TestComplexNullableOptionalResponse" optional="false" disableDefaultResponse="true">