add operators

conditional-variables/evaluate.sh

@@ -69,6 +69,18 @@ evaluate_condition() {
             [[ "$actual" != "$expected" ]]
             ;;
      
+        "contains")
+            [[ "$actual" == *"$expected"* ]]
+            ;;
+    
+        "startsWith")
+            [[ "$actual" == "$expected"* ]]
+            ;;
+    
+        "endsWith")
+            [[ "$actual" == *"$expected" ]]
+            ;;
+
         ">"|">="|"<"|"<=")
 
             if [[ ! "$actual" =~ ^-?[0-9]+$ ]]; then