Use libuv errors instead of errno in unit tests

Replaced old unit tests for errno with libuv error codes UV_ENOENT
and UV_EEXIST (for os_open and os_getperms).

Added libuv include path to test/includes compiler calls - needed
to get hold of libuv headers.

4 files changed, 12 insertions, 11 deletions

diff --git a/test/includes/CMakeLists.txt b/test/includes/CMakeLists.txt
index a139683b42..3d85197f19 100644
--- a/test/includes/CMakeLists.txt
+++ b/test/includes/CMakeLists.txt
@@ -8,6 +8,7 @@ foreach(hfile ${PRE_HEADERS})
     OUTPUT ${CMAKE_CURRENT_BINARY_DIR}/${post_hfile}
     COMMAND ${CMAKE_C_COMPILER} -std=c99 -E -P
       ${CMAKE_CURRENT_SOURCE_DIR}/${hfile}
+      -I${LIBUV_INCLUDE_DIRS}
       -o ${CMAKE_CURRENT_BINARY_DIR}/${post_hfile})
   list(APPEND POST_HEADERS ${post_hfile})
 endforeach()
diff --git a/test/includes/pre/sys/errno.h b/test/includes/pre/sys/errno.h
deleted file mode 100644
index 0b8934d33e..0000000000
--- a/test/includes/pre/sys/errno.h
+++ /dev/null
@@ -1,4 +0,0 @@
-#include <sys/errno.h>
-
-static const int kENOENT = ENOENT;
-static const int kEEXIST = EEXIST;
diff --git a/test/includes/pre/uv-errno.h b/test/includes/pre/uv-errno.h
new file mode 100644
index 0000000000..6b80f60e5c
--- /dev/null
+++ b/test/includes/pre/uv-errno.h
@@ -0,0 +1,4 @@
+#include <uv-errno.h>
+
+static const int kUV_ENOENT = UV_ENOENT;
+static const int kUV_EEXIST = UV_EEXIST;
diff --git a/test/unit/os/fs_spec.lua b/test/unit/os/fs_spec.lua
index 5a1b9e3aa8..95c98f18a1 100644
--- a/test/unit/os/fs_spec.lua
+++ b/test/unit/os/fs_spec.lua
@@ -23,7 +23,7 @@ cimport('./src/nvim/fileio.h')
 local fs = cimport('./src/nvim/os/os.h')
 cppimport('sys/stat.h')
 cppimport('sys/fcntl.h')
-cppimport('sys/errno.h')
+cppimport('uv-errno.h')
 
 local buffer = ""
 local directory = nil
@@ -233,8 +233,8 @@ describe('fs function', function()
     end
 
     describe('os_getperm', function()
-      it('returns -1 when the given file does not exist', function()
-        eq(-1, (os_getperm('non-existing-file')))
+      it('returns UV_ENOENT when the given file does not exist', function()
+        eq(ffi.C.UV_ENOENT, (os_getperm('non-existing-file')))
       end)
 
       it('returns a perm > 0 when given an existing file', function()
@@ -445,8 +445,8 @@ describe('fs function', function()
       local new_file = 'test_new_file'
       local existing_file = 'unit-test-directory/test_existing.file'
 
-      it('returns -ENOENT for O_RDWR on a non-existing file', function()
-        eq(-ffi.C.kENOENT, (os_open('non-existing-file', ffi.C.kO_RDWR, 0)))
+      it('returns UV_ENOENT for O_RDWR on a non-existing file', function()
+        eq(ffi.C.UV_ENOENT, (os_open('non-existing-file', ffi.C.kO_RDWR, 0)))
       end)
 
       it('returns non-negative for O_CREAT on a non-existing file', function()
@@ -459,9 +459,9 @@ describe('fs function', function()
         assert.is_true(0 <= (os_open(existing_file, ffi.C.kO_CREAT, 0)))
       end)
 
-      it('returns -EEXIST for O_CREAT|O_EXCL on a existing file', function()
+      it('returns UV_EEXIST for O_CREAT|O_EXCL on a existing file', function()
         assert_file_exists(existing_file)
-        eq(-ffi.C.kEEXIST, (os_open(existing_file, (bit.bor(ffi.C.kO_CREAT, ffi.C.kO_EXCL)), 0)))
+        eq(ffi.C.kUV_EEXIST, (os_open(existing_file, (bit.bor(ffi.C.kO_CREAT, ffi.C.kO_EXCL)), 0)))
       end)
 
       it('sets `rwx` permissions for O_CREAT 700', function()