Disabled lazy number deserialization (fixes #772)

test/Numbers/isInteger.cpp

@@ -0,0 +1,40 @@
+// ArduinoJson - arduinojson.org
+// Copyright Benoit Blanchon 2014-2018
+// MIT License
+
+#include <ArduinoJson/Numbers/isInteger.hpp>
+#include <catch.hpp>
+
+using namespace ArduinoJson::Internals;
+
+TEST_CASE("isInteger()") {
+  SECTION("Null") {
+    REQUIRE(isInteger(NULL) == false);
+  }
+
+  SECTION("Empty string") {
+    REQUIRE(isInteger("") == false);
+  }
+
+  SECTION("FloatNotInteger") {
+    REQUIRE(isInteger("3.14") == false);
+    REQUIRE(isInteger("-3.14") == false);
+    REQUIRE(isInteger("+3.14") == false);
+  }
+
+  SECTION("Spaces") {
+    REQUIRE(isInteger("42 ") == false);
+    REQUIRE(isInteger(" 42") == false);
+  }
+
+  SECTION("Valid") {
+    REQUIRE(isInteger("42") == true);
+    REQUIRE(isInteger("-42") == true);
+    REQUIRE(isInteger("+42") == true);
+  }
+
+  SECTION("ExtraSign") {
+    REQUIRE(isInteger("--42") == false);
+    REQUIRE(isInteger("++42") == false);
+  }
+}