From 7c2a187258738f3b1f83c987ac333a73ec68901b Mon Sep 17 00:00:00 2001
From: Niels Lohmann <mail@nlohmann.me>
Date: Tue, 20 Jun 2017 21:09:26 +0200
Subject: [PATCH] :white_check_mark: improved test coverage

---
 test/src/unit-comparison.cpp      | 9 +++++++++
 test/src/unit-deserialization.cpp | 7 +++++++
 2 files changed, 16 insertions(+)

diff --git a/test/src/unit-comparison.cpp b/test/src/unit-comparison.cpp
index ac243674..3219d595 100644
--- a/test/src/unit-comparison.cpp
+++ b/test/src/unit-comparison.cpp
@@ -31,6 +31,14 @@ SOFTWARE.
 #include "json.hpp"
 using nlohmann::json;
 
+// helper function to check std::less<json::value_t>
+// see http://en.cppreference.com/w/cpp/utility/functional/less
+template <typename A, typename B, typename U = std::less<json::value_t>>
+bool f(A a, B b, U u = U())
+{
+    return u(a, b);
+}
+
 TEST_CASE("lexicographical comparison operators")
 {
     SECTION("types")
@@ -69,6 +77,7 @@ TEST_CASE("lexicographical comparison operators")
                     CAPTURE(j);
                     // check precomputed values
                     CHECK(operator<(j_types[i], j_types[j]) == expected[i][j]);
+                    CHECK(f(j_types[i], j_types[j]) == expected[i][j]);
                 }
             }
         }
diff --git a/test/src/unit-deserialization.cpp b/test/src/unit-deserialization.cpp
index 66fb5e1b..81ee2770 100644
--- a/test/src/unit-deserialization.cpp
+++ b/test/src/unit-deserialization.cpp
@@ -359,6 +359,13 @@ TEST_CASE("deserialization")
                 CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error);
                 CHECK(not json::accept(std::begin(v), std::end(v)));
             }
+
+            SECTION("case 16")
+            {
+                uint8_t v[] = {'{', '1', ',', ','};
+                CHECK_THROWS_AS(json::parse(std::begin(v), std::end(v)), json::parse_error);
+                CHECK(not json::accept(std::begin(v), std::end(v)));
+            }
         }
     }
 }