Add test for proj_errno_string()

test/unit/CMakeLists.txt

@@ -52,7 +52,8 @@ unset(_save_cxx_flags)
 #
 add_executable(proj_test_unit
   main.cpp
-  basic_test.cpp)
+  basic_test.cpp
+  proj_errno_string_test.cpp)
 target_link_libraries(proj_test_unit
   gtest
   ${PROJ_LIBRARIES})

test/unit/Makefile.am

@@ -9,6 +9,7 @@ AM_CXXFLAGS = @CXX_WFLAGS@ @NO_ZERO_AS_NULL_POINTER_CONSTANT_FLAG@
 
 bin_PROGRAMS = basic_test
 bin_PROGRAMS += pj_phi2_test
+bin_PROGRAMS += proj_errno_string_test
 
 basic_test_SOURCES = basic_test.cpp main.cpp
 basic_test_LDADD = ../../src/libproj.la ../../test/googletest/libgtest.la
@@ -22,5 +23,11 @@ pj_phi2_test_LDADD = ../../src/libproj.la ../../test/googletest/libgtest.la
 pj_phi2_test-check: pj_phi2_test
 	./pj_phi2_test
 
+proj_errno_string_test_SOURCES = proj_errno_string_test.cpp main.cpp
+proj_errno_string_test_LDADD= ../../src/libproj.la ../../test/googletest/libgtest.la
+
+proj_errno_string_test-check: proj_errno_string_test
+	./proj_errno_string_test
+
 check-local: basic_test-check
-check-local: pj_phi2_test-check
+check-local: pj_phi2_test-check proj_errno_string_test-check

test/unit/proj_errno_string_test.cpp

@@ -0,0 +1,57 @@
+/******************************************************************************
+ *
+ * Project:  PROJ
+ * Purpose:  Unit test for proj_errno_string()
+ * Author:   Kurt Schwehr <schwehr@google.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 "proj.h"
+
+#include "gtest_include.h"
+
+namespace {
+
+TEST(ProjErrnoStringTest, Basic) {
+
+    // Test the no error result
+    ASSERT_EQ(0, proj_errno_string(0));
+
+    // Test both valid and invalid PROJ error numbers
+    ASSERT_STREQ("no arguments in initialization list", proj_errno_string(-1));
+    ASSERT_STREQ("invalid projection system error (-9999)", proj_errno_string(-9999));
+    ASSERT_STREQ("invalid projection system error (-9999)", proj_errno_string(-99999));
+    ASSERT_STREQ("invalid projection system error (-1000)", proj_errno_string(-1000));
+
+    // Test POSIX error numbers
+    #ifdef HAVE_STRERROR
+    ASSERT_STREQ(strerrno(5), proj_errno_string(5));
+    ASSERT_STREQ(strerrno(9999), proj_errno_string(9999));
+    #else // ... or the PROJ specific error string when not on a POSIX system
+    ASSERT_STREQ("no system list, errno: 5\n", proj_errno_string(5));
+    ASSERT_STREQ("no system list, errno: 9999\n", proj_errno_string(9999));
+    ASSERT_STREQ("no system list, errno: 9999\n", proj_errno_string(99999));
+    #endif
+}
+
+}  // namespace