[YAML] Allow hex: prefix for octet strings

examples/chip-tool/templates/tests/partials/command_value.zapt

@@ -60,7 +60,11 @@
       {{else if (isCharString type)}}
         chip::Span<const char>("{{definedValue}}garbage: not in length on purpose", {{utf8StringLength definedValue}});
       {{else if (isOctetString type)}}
-        chip::ByteSpan(chip::Uint8::from_const_char("{{octetStringEscapedForCLiteral definedValue}}garbage: not in length on purpose"), {{definedValue.length}});
+        {{~#if (isHexString definedValue)}}
+          chip::ByteSpan(chip::Uint8::from_const_char("{{octetStringFromHexString definedValue}}garbage: not in length on purpose"), {{octetStringLengthFromHexString definedValue}});
+        {{else}}
+          chip::ByteSpan(chip::Uint8::from_const_char("{{octetStringEscapedForCLiteral definedValue}}garbage: not in length on purpose"), {{definedValue.length}});
+        {{/if}}
       {{else}}
         {{#if_is_strongly_typed_bitmap type}}
           static_cast<{{zapTypeToEncodableClusterObjectType type ns=ns}}>({{asTypedLiteral definedValue type}});

examples/chip-tool/templates/tests/partials/value_equals.zapt

@@ -52,7 +52,12 @@
     VerifyOrReturn(CheckValue{{#if (isString type)}}AsString{{/if}}("{{label}}", {{actual}}, 
       {{~#if (chip_tests_variables_has expected)}}{{expected}}
       {{else if keepAsExpected}}{{expected}}
-      {{else if (isOctetString type)}}chip::ByteSpan(chip::Uint8::from_const_char("{{octetStringEscapedForCLiteral expected}}"), {{expected.length}})
+      {{else if (isOctetString type)}}
+        {{~#if (isHexString expected)}}
+          chip::ByteSpan(chip::Uint8::from_const_char("{{octetStringFromHexString expected}}"), {{octetStringLengthFromHexString expected}})
+        {{else}}
+          chip::ByteSpan(chip::Uint8::from_const_char("{{octetStringEscapedForCLiteral expected}}"), {{expected.length}})
+        {{/if}}
       {{else if (isCharString type)}}chip::CharSpan("{{expected}}", {{utf8StringLength expected}})
       {{else if (chip_tests_config_has expected)}}m{{asUpperCamelCase expected}}.HasValue() ? m{{asUpperCamelCase expected}}.Value() : {{asTypedLiteral (chip_tests_config_get_default_value expected) (chip_tests_config_get_type expected)}}
       {{else}}{{asTypedExpression expected type}}

examples/darwin-framework-tool/templates/tests/partials/check_test_value.zapt

@@ -38,7 +38,12 @@
   {{else}}
     VerifyOrReturn(CheckValue{{#if (isString type)}}AsString{{/if}}("{{label}}", {{actual}}, 
       {{~#if (chip_tests_variables_has expected)}}{{expected}}
-      {{~else if (isOctetString type)}}[[NSData alloc] initWithBytes:"{{octetStringEscapedForCLiteral expected}}" length:{{expected.length}}]
+      {{~else if (isOctetString type)}}
+        {{~#if (isHexString expected)}}
+        [[NSData alloc] initWithBytes:"{{octetStringFromHexString expected}}" length:{{octetStringLengthFromHexString expected}}]
+        {{else}}
+        [[NSData alloc] initWithBytes:"{{octetStringEscapedForCLiteral expected}}" length:{{expected.length}}]
+        {{/if}}
       {{~else if (isCharString type)}}@"{{expected}}"
       {{else if (chip_tests_config_has expected)}}m{{asUpperCamelCase expected}}.HasValue() ? m{{asUpperCamelCase expected}}.Value() : {{asTypedLiteral (chip_tests_config_get_default_value expected) (chip_tests_config_get_type expected)}}
       {{~else}}{{asTypedExpressionFromObjectiveC expected type}}

examples/darwin-framework-tool/templates/tests/partials/test_value.zapt

@@ -46,7 +46,11 @@
       {{#if (isCharString type)}}
         @"{{definedValue}}";
       {{else if (isOctetString type)}}
+        {{~#if (isHexString definedValue)}}
+        [[NSData alloc] initWithBytes:"{{octetStringFromHexString definedValue}}" length:{{octetStringLengthFromHexString definedValue}}];
+        {{else}}
         [[NSData alloc] initWithBytes:"{{octetStringEscapedForCLiteral definedValue}}" length:{{definedValue.length}}];
+        {{/if}}
       {{else}}
         [NSNumber numberWith{{asObjectiveCNumberType definedValue type false}}:{{asTypedExpressionFromObjectiveC definedValue type}}];
       {{/if}}

src/app/tests/suites/TestCluster.yaml

@@ -727,6 +727,18 @@ tests:
       response:
           value: "Tes\x00ti\x00ng"
 
+    - label: "Write attribute OCTET_STRING with hex: format"
+      command: "writeAttribute"
+      attribute: "octet_string"
+      arguments:
+          value: "hex:000102030405"
+
+    - label: "Read attribute OCTET_STRING with hex: format"
+      command: "readAttribute"
+      attribute: "octet_string"
+      response:
+          value: "hex:000102030405"
+
     - label: "Write attribute OCTET_STRING with weird chars"
       command: "writeAttribute"
       attribute: "octet_string"

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

@@ -48,6 +48,8 @@ const kPICSName          = 'PICS';
 const kSaveAsName        = 'saveAs';
 const kFabricFiltered    = 'fabricFiltered';
 
+const kHexPrefix = 'hex:';
+
 class NullObject {
   toString()
   {
@@ -826,6 +828,33 @@ function isLiteralNull(value, options)
   return (value === null) || (value instanceof NullObject);
 }
 
+function isHexString(value)
+{
+  return value && value.startsWith(kHexPrefix);
+}
+
+function octetStringFromHexString(value)
+{
+  const hexString = value.substring(kHexPrefix.length);
+
+  if (hexString.length % 2) {
+    throw new Error("The provided hexadecimal string contains an even number of characters");
+  }
+
+  if (!(/^[0-9a-fA-F]+$/.test(hexString))) {
+    throw new Error("The provided hexadecimal string contains invalid hexadecimal character.");
+  }
+
+  const bytes = hexString.match(/(..)/g);
+  return bytes.map(byte => '\\x' + byte).join('');
+}
+
+function octetStringLengthFromHexString(value)
+{
+  const hexString = value.substring(kHexPrefix.length);
+  return (hexString.length / 2);
+}
+
 function octetStringEscapedForCLiteral(value)
 {
   // Escape control characters, things outside the ASCII range, and single
@@ -996,3 +1025,6 @@ exports.chip_tests_only_cluster_commands            = chip_tests_only_cluster_co
 exports.chip_tests_only_cluster_command_parameters  = chip_tests_only_cluster_command_parameters;
 exports.chip_tests_only_cluster_responses           = chip_tests_only_cluster_responses;
 exports.chip_tests_only_cluster_response_parameters = chip_tests_only_cluster_response_parameters;
+exports.isHexString                                 = isHexString;
+exports.octetStringLengthFromHexString              = octetStringLengthFromHexString;
+exports.octetStringFromHexString                    = octetStringFromHexString;