From a3210ee2a9917a39a8d6d3bb36f90ec52af37bc7 Mon Sep 17 00:00:00 2001
From: Niels <niels.lohmann@gmail.com>
Date: Sat, 11 Apr 2015 15:42:54 +0200
Subject: [PATCH] increase test coverage

---
 README.md     |  2 +-
 test/unit.cpp | 24 ++++++++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/README.md b/README.md
index 66d391cf7..c1dc81796 100644
--- a/README.md
+++ b/README.md
@@ -392,7 +392,7 @@ $ make
 $ ./json_unit
 
 ===============================================================================
-All tests passed (4332 assertions in 18 test cases)
+All tests passed (4463 assertions in 18 test cases)
 ```
 
 For more information, have a look at the file [.travis.yml](https://github.com/nlohmann/json/blob/master/.travis.yml).
diff --git a/test/unit.cpp b/test/unit.cpp
index 5b20218af..6c2aec6d3 100644
--- a/test/unit.cpp
+++ b/test/unit.cpp
@@ -3022,6 +3022,18 @@ TEST_CASE("element access")
     {
         SECTION("erase with one valid iterator")
         {
+            SECTION("null")
+            {
+                {
+                    json j;
+                    CHECK_THROWS_AS(j.erase(j.begin()), std::runtime_error);
+                }
+                {
+                    json j;
+                    CHECK_THROWS_AS(j.erase(j.cbegin()), std::runtime_error);
+                }
+            }
+
             SECTION("string")
             {
                 {
@@ -3140,6 +3152,18 @@ TEST_CASE("element access")
 
         SECTION("erase with two valid iterators")
         {
+            SECTION("null")
+            {
+                {
+                    json j;
+                    CHECK_THROWS_AS(j.erase(j.begin(), j.end()), std::runtime_error);
+                }
+                {
+                    json j;
+                    CHECK_THROWS_AS(j.erase(j.cbegin(), j.cend()), std::runtime_error);
+                }
+            }
+
             SECTION("string")
             {
                 {