Handle another double quote special case (#54474) (#54560)

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

Co-authored-by: Elastic Machine <elasticmachine@users.noreply.github.com>

Author: jloleysens

src/legacy/core_plugins/console/public/np_ready/lib/utils/__tests__/utils_string_expanding.txt

@@ -52,3 +52,33 @@ Correctly handle new lines in triple quotes
     SELECT * FROM "TABLE"
     """
 }
+==========
+Single quotes escaped special case, start and end
+-------------------------------------
+{
+  "query": "\"test\""
+}
+-------------------------------------
+{
+  "query": "\"test\""
+}
+==========
+Single quotes escaped special case, start
+-------------------------------------
+{
+  "query": "\"test"
+}
+-------------------------------------
+{
+  "query": "\"test"
+}
+==========
+Single quotes escaped special case, end
+-------------------------------------
+{
+  "query": "test\""
+}
+-------------------------------------
+{
+  "query": "test\""
+}

src/legacy/core_plugins/console/public/np_ready/lib/utils/utils.ts

@@ -84,6 +84,20 @@ export function expandLiteralStrings(data: string) {
     // Expand to triple quotes if there are _any_ slashes
     if (string.match(/\\./)) {
       const firstDoubleQuoteIdx = string.indexOf('"');
+      const lastDoubleQuoteIdx = string.lastIndexOf('"');
+
+      // Handle a special case where we may have a value like "\"test\"". We don't
+      // want to expand this to """"test"""" - so we terminate before processing the string
+      // further if we detect this either at the start or end of the double quote section.
+
+      if (string[firstDoubleQuoteIdx + 1] === '\\' && string[firstDoubleQuoteIdx + 2] === '"') {
+        return string;
+      }
+
+      if (string[lastDoubleQuoteIdx - 1] === '"' && string[lastDoubleQuoteIdx - 2] === '\\') {
+        return string;
+      }
+
       const colonAndAnySpacing = string.slice(0, firstDoubleQuoteIdx);
       const rawStringifiedValue = string.slice(firstDoubleQuoteIdx, string.length);
       // Remove one level of JSON stringification