[PATCH v3 3/4] msvcrt/tests: Add tests about intricating kernel32 and msvcrt env calls.

[Eric Pouech]

From: Eric Pouech

Signed-off-by: Eric Pouech 
---
 dlls/msvcrt/tests/environ.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/dlls/msvcrt/tests/environ.c b/dlls/msvcrt/tests/environ.c
index 8f53f093093..3288c5ab99c 100644
--- a/dlls/msvcrt/tests/environ.c
+++ b/dlls/msvcrt/tests/environ.c
@@ -406,6 +406,17 @@ static void test_environment_manipulation(void)
     ok( count + 1 == env_get_entry_countA( *p_environ ), "Unexpected count\n" );
     ok( _putenv( "__winetest_dog=" ) == 0, "Couldn't reset env var\n" );
     ok( count == env_get_entry_countA( *p_environ ), "Unexpected count\n" );
+
+    /* in putenv, only changed variable is updated (no other reload of kernel info is done) */
+    ok( _putenv( "__winetest_duck=" ) == 0, "Couldn't reset env var\n" );
+    ok( _putenv( "__winetest_elephant=" ) == 0, "Couldn't reset env var\n" );
+    ret = SetEnvironmentVariableA( "__winetest_duck", "quack" );
+    ok( ret, "SetEnvironmentVariableA failed: %lu\n", GetLastError() );
+    ok( _putenv( "__winetest_elephant=trumpet" ) == 0, "Couldn't set env var\n" );
+    todo_wine
+    ok( getenv( "__winetest_duck" ) == NULL, "msvcrt env cache shouldn't have been updated\n" );
+    ok( _putenv( "__winetest_duck=" ) == 0, "Couldn't reset env var\n" );
+    ok( _putenv( "__winetest_elephant=" ) == 0, "Couldn't reset env var\n" );
 }

START_TEST(environ)