ZAPP-1695: Enable toggling desc features to fix the TagList feature issue (#1685)

* do not disable toggling on desc features, display warning instead

* add unit test

src-electron/validation/conformance-checker.js

diff --git a/src-electron/validation/conformance-checker.js b/src-electron/validation/conformance-checker.js
index d210823..d60f7b0 100644
--- a/src-electron/validation/conformance-checker.js
+++ b/src-electron/validation/conformance-checker.js
@@ -90,19 +90,7 @@
     }
   }
 
-  // Check 2: if the feature conformance contains the operand 'desc'
-  let featureContainsDesc = conformEvaluator.checkIfExpressionHasOperand(
-    featureData.conformance,
-    dbEnum.conformanceTag.described
-  )
-  if (featureContainsDesc) {
-    result.warningMessage.push(
-      warningPrefix +
-        ` ${updateDisabledString} its conformance is too complex for ZAP to process, or it includes 'desc'.`
-    )
-  }
-
-  // Check 3: if the feature update will change the conformance of other dependent features
+  // Check 2: if the feature update will change the conformance of other dependent features
   if (featuresToUpdate && Object.keys(featuresToUpdate).length > 0) {
     let featuresToUpdateString = Object.entries(featuresToUpdate)
       .map(([feature, isEnabled]) =>
@@ -115,7 +103,7 @@
     )
   }
 
-  // Check 4: if any elements that conform to the updated feature contain 'desc' in their conformance
+  // Check 3: if any elements that conform to the updated feature contain 'desc' in their conformance
   if (
     (descElements.attributes && descElements.attributes.length > 0) ||
     (descElements.commands && descElements.commands.length > 0) ||
@@ -142,7 +130,6 @@
 
   if (
     missingOperands.length == 0 &&
-    !featureContainsDesc &&
     (Object.keys(descElements).length == 0 ||
       (descElements.attributes.length == 0 &&
         descElements.commands.length == 0 &&
@@ -203,6 +190,17 @@
           : buildNonElementConformMessage('enabled', 'mandatory'))
       result.displayWarning = !added
     }
+    // if the feature conformance contains the operand 'desc', do not disable toggling, but show warning message
+    let featureContainsDesc = conformEvaluator.checkIfExpressionHasOperand(
+      featureData.conformance,
+      dbEnum.conformanceTag.described
+    )
+    if (featureContainsDesc) {
+      result.warningMessage =
+        warningPrefix +
+        ` is being ${added ? 'enabled' : 'disabled'}, but it has descriptive conformance and requires manual validation from the feature specification to enable/disable the right dependencies in ZAP.`
+      result.displayWarning = true
+    }
 
     // generate patterns for outdated feature warnings to be deleted
     let updatedFeatures = [featureData, ...(changedConformFeatures || [])]

test/feature.test.js

diff --git a/test/feature.test.js b/test/feature.test.js
index 179294c..7cd9469 100644
--- a/test/feature.test.js
+++ b/test/feature.test.js
@@ -768,6 +768,56 @@
 )
 
 test(
+  'Check feature with desc conformance allows toggling but shows warning',
+  () => {
+    // Test enabling a feature with 'desc' conformance
+    let elements = {
+      attributes: [],
+      commands: [],
+      events: []
+    }
+    let featureMap = {
+      DESCFEATURE: false
+    }
+    let featureWithDesc = {
+      cluster: 'Test Cluster',
+      name: 'Feature With Desc',
+      code: 'DESCFEATURE',
+      conformance: 'desc',
+      deviceTypes: ['Test Device Type'],
+      bit: 0
+    }
+    let clusterFeatures = [featureWithDesc]
+    let endpointId = 1
+
+    // Enable the feature with 'desc' conformance
+    featureMap['DESCFEATURE'] = true
+    let result = conformChecker.checkElementConformance(
+      elements,
+      featureMap,
+      featureWithDesc,
+      endpointId,
+      clusterFeatures
+    )
+
+    // Should allow toggling (disableChange is false) but show warning
+    let warningPrefix = env.formatEmojiMessage(
+      '⚠️',
+      `Check Feature Compliance on endpoint: ${endpointId}, cluster: ${featureWithDesc.cluster}, ` +
+        `feature: ${featureWithDesc.name} (${featureWithDesc.code}) (bit ${featureWithDesc.bit} in featureMap attribute)`
+    )
+    let expectedWarning =
+      warningPrefix +
+      ` is being enabled, but it has descriptive conformance and requires manual validation from the feature specification to enable/disable the right dependencies in ZAP.`
+
+    expect(result.displayWarning).toBeTruthy()
+    expect(result.disableChange).toBeFalsy()
+    expect(result.warningMessage).toBe(expectedWarning)
+  },
+  testUtil.timeout.short()
+)
+
+test(
   'Test API for getting FeatureMap attribute value',
   async () => {
     // get relevant data from the On/Off cluster and pass it to the API