[API] Test Runner: Updates matcher regular expression for big numbers

Author: picandocodigo

api-spec-testing/rspec_matchers.rb

@@ -233,7 +233,7 @@ def compare_string(expected, actual_value, test, response)
         parsed = parsed.gsub(/\$\{?#{match.first}\}?/, test.cached_values[match.first])
       end
       /#{parsed.tr("/", "")}/ =~ actual_value
-    elsif !!(expected.match?(/^[0-9]{1}\.[0-9]+E[0-9]+/))
+    elsif !!(expected.match?(/^-?[0-9]{1}\.[0-9]+E[0-9]+/))
       # When the value in the yaml test is a big number, the format is
       # different from what Ruby uses, so we transform  X.XXXXEXX to X.XXXXXe+XX
       # to be able to compare the values