1 files changed, 68 insertions, 0 deletions
diff --git a/test/unit/proj_errno_string_test.cpp b/test/unit/proj_errno_string_test.cpp
new file mode 100644
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+++ b/test/unit/proj_errno_string_test.cpp
@@ -0,0 +1,68 @@
+/******************************************************************************
+ *
+ * Project:  PROJ
+ * Purpose:  Unit test for proj_errno_string()
+ * Author:   Kristian Evers <kristianevers@gmail.com>
+ *
+ ******************************************************************************
+ * Copyright (c) 2018, Kristian Evers.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ ****************************************************************************/
+
+#include <cstring>
+
+#include "proj.h"
+
+#include "gtest_include.h"
+
+namespace {
+
+TEST(ProjErrnoStringTest, NoError) {
+    EXPECT_EQ(0, proj_errno_string(0));
+}
+
+TEST(ProjErrnoStringTest, ProjErrnos) {
+    EXPECT_STREQ("no arguments in initialization list", proj_errno_string(-1));
+    EXPECT_STREQ("invalid projection system error (-1000)", proj_errno_string(-1000));
+    EXPECT_STREQ("invalid projection system error (-9999)", proj_errno_string(-9999));
+    // for errnos < -9999, -9999 is always returned
+    constexpr int min = std::numeric_limits<int>::min();
+    EXPECT_STREQ("invalid projection system error (-9999)",proj_errno_string(min));
+    EXPECT_STREQ("invalid projection system error (-9999)", proj_errno_string(-10000));
+}
+
+TEST(ProjErrnoStringTest, SystemErrnos) {
+    constexpr int max = std::numeric_limits<int>::max();
+
+#ifdef HAVE_STRERROR
+    EXPECT_STREQ(strerror(5), proj_errno_string(5));
+    EXPECT_STREQ(strerror(9999), proj_errno_string(9999));
+    EXPECT_STREQ(strerror(10000), proj_errno_string(10000));
+    EXPECT_STREQ(strerror(max), proj_errno_string(max));
+#else
+    EXPECT_STREQ("no system list, errno: 5\n", proj_errno_string(5));
+    EXPECT_STREQ("no system list, errno: 9999\n", proj_errno_string(9999));
+    // for errnos > 9999, 9999 is always returned
+    EXPECT_STREQ("no system list, errno: 9999\n", proj_errno_string(10000));
+    EXPECT_STREQ("no system list, errno: 9999\n", proj_errno_string(max));
+#endif
+}
+
+}  // namespace