cabinet/tests: Split an incorrect test in two valid ones.

dlls/cabinet/tests/fdi.c

@@ -608,8 +608,6 @@ static void test_FDICopy(void)
     char name[] = "extract.cab";
     char path[MAX_PATH + 1];
 
-    GetCurrentDirectoryA(MAX_PATH, path);
-
     set_cab_parameters(&cabParams);
 
     hfci = FCICreate(&erf, file_placed, mem_alloc, mem_free, fci_open,
@@ -621,11 +619,15 @@ static void test_FDICopy(void)
 
     FCIDestroy(hfci);
 
+    lstrcpyA(path, CURR_DIR);
+
+    /* path doesn't have a trailing backslash */
+    if (lstrlenA(path) > 2)
+    {
         hfdi = FDICreate(fdi_alloc, fdi_free, fdi_open, fdi_read,
                          fdi_write, fdi_close, fdi_seek,
                          cpuUNKNOWN, &erf);
 
-    /* cabinet with no files or folders */
         SetLastError(0xdeadbeef);
         ret = FDICopy(hfdi, name, path, 0, CopyProgress, NULL, 0);
         ok(ret == FALSE, "Expected FALSE, got %d\n", ret);
@@ -636,6 +638,25 @@ static void test_FDICopy(void)
         }
 
         FDIDestroy(hfdi);
+    }
+    else
+        skip("Running on a root drive directory.\n");
+
+    lstrcatA(path, "\\");
+
+    hfdi = FDICreate(fdi_alloc, fdi_free, fdi_open, fdi_read,
+                     fdi_write, fdi_close, fdi_seek,
+                     cpuUNKNOWN, &erf);
+
+    /* cabinet with no files or folders */
+    SetLastError(0xdeadbeef);
+    ret = FDICopy(hfdi, name, path, 0, CopyProgress, NULL, 0);
+    todo_wine
+    ok(ret == TRUE, "Expected TRUE, got %d\n", ret);
+    ok(GetLastError() == 0, "Expected 0f, got %d\n", GetLastError());
+
+    FDIDestroy(hfdi);
+
     DeleteFileA(name);
 }