feat: support conditional event templates

Related to camunda/camunda-modeler#5400

Author: jarekdanielak

test/fixtures/conditional-event-broken.json

@@ -0,0 +1,33 @@
+[
+  {
+  "$schema": "https://unpkg.com/@camunda/zeebe-element-templates-json-schema/resources/schema.json",
+  "id": "io.camunda.examples.conditional",
+  "name": "Conditional Event",
+  "appliesTo": [
+    "bpmn:Event"
+  ],
+  "elementType": {
+    "value": "bpmn:IntermediateCatchEvent",
+    "eventDefinition": "bpmn:ConditionalEventDefinition"
+  },
+  "properties": [
+    {
+      "label": "Variable Names",
+      "type": "String",
+      "binding": {
+        "type": "bpmn:ConditionalEventDefinition#zeebe:conditionalFilter#property",
+        "name": "variableNamesWrong"
+      }
+    },
+    {
+      "label": "Variable Events",
+      "type": "Hidden",
+      "value": "create,update",
+      "binding": {
+        "type": "bpmn:ConditionalEventDefinition#zeebe:conditionalFilter#property",
+        "name": "variableEvents"
+      }
+    }
+  ]
+}
+]

test/fixtures/conditional-event.json

@@ -0,0 +1,33 @@
+[
+  {
+  "$schema": "https://unpkg.com/@camunda/zeebe-element-templates-json-schema/resources/schema.json",
+  "id": "io.camunda.examples.conditional",
+  "name": "Conditional Event",
+  "appliesTo": [
+    "bpmn:Event"
+  ],
+  "elementType": {
+    "value": "bpmn:IntermediateCatchEvent",
+    "eventDefinition": "bpmn:ConditionalEventDefinition"
+  },
+  "properties": [
+    {
+      "label": "Variable Names",
+      "type": "String",
+      "binding": {
+        "type": "bpmn:ConditionalEventDefinition#zeebe:conditionalFilter#property",
+        "name": "variableNames"
+      }
+    },
+    {
+      "label": "Variable Events",
+      "type": "Hidden",
+      "value": "create,update",
+      "binding": {
+        "type": "bpmn:ConditionalEventDefinition#zeebe:conditionalFilter#property",
+        "name": "variableEvents"
+      }
+    }
+  ]
+}
+]

test/spec/validationSpec.js

@@ -1087,6 +1087,43 @@ describe('Validator', function() {
     });
 
 
+    it('should validate conditional event templates', function() {
+
+      // given
+      const samples = require('../fixtures/conditional-event.json');
+
+      // when
+      const {
+        valid,
+        results
+      } = validateAllZeebe(samples);
+
+      // then
+      expect(valid).to.be.true;
+      expect(results.length).to.eql(samples.length);
+      expect(results.every(r => r.valid)).to.be.true;
+      expect(results.map(r => r.object)).to.eql(samples);
+    });
+
+
+    it('should validate conditional event templates with errors', function() {
+
+      // given
+      const samples = require('../fixtures/conditional-event-broken.json');
+
+      // when
+      const {
+        valid,
+        results
+      } = validateAllZeebe(samples);
+
+      // then
+      expect(valid).to.be.false;
+      expect(results.every(r => !r.valid)).to.be.true;
+      expect(results.map(r => r.object)).to.eql(samples);
+    });
+
+
     describe('property', function() {
 
       it('should validate', function() {