* Makefile.in: Add a 'check' target that builds and runs

testsuite.exe from path-testsuite.o and testsuite.o.
	* path.cc: Include testsuite.h.
	(struct mnt): Change to a mnt_t typedef and don't define
	mount_table when TESTSUITE is defined.
	(find2): Don't include when TESTSUITE is defined to avoid warning.
	(get_cygdrive0): Ditto.
	(get_cygdrive): Ditto.
	(read_mounts): Provide empty implementation when TESTSUITE is
	defined.
	(vconcat): Use the isslash macro.
	(unconvert_slashes): New helper to convert to backslashses.
	(rel_vconcat): Handle relative paths more gracefully.
	(cygpath): Skip a leading "./" sequence.  Avoid double-slashes.
	Normalize final output to backslashes and remove redundant path
	sequences.
	* testsuite.cc: New file implementing testsuite driver.
	* testsuite.h: New header implementing harness mount table and
	series of tests.

winsup/utils/testsuite.cc

@@ -0,0 +1,89 @@
+/* testsuite.cc
+
+   Copyright 2008 Red Hat, Inc.
+
+This file is part of Cygwin.
+
+This software is a copyrighted work licensed under the terms of the
+Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
+details. */
+
+/* This file implements a driver for performing tests on the file/path
+   translation code in path.cc.  This file is meant to be generic, all
+   test harness data is in testsuite.h.  */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#define TESTSUITE
+#include "testsuite.h"
+
+typedef struct
+  {
+    const char *cwd;    /* in win32 form, as if by GetCurrentDirectory */
+    const char *posix;  /* input */
+    const char *win32;  /* expected output */
+  } test_t;
+
+#define TESTSUITE_TESTS
+#include "testsuite.h"
+#undef TESTSUITE_TESTS
+
+static int curtest;
+
+/* A replacement for the w32api GetCurrentDirectory() that returns
+   the cwd that the current test specifies.  */
+DWORD
+testsuite_getcwd (DWORD nBufferLength, LPSTR lpBuffer)
+{
+  unsigned len = strlen (testsuite_tests[curtest].cwd) + 1;
+
+  /* If the test specified NO_CWD, then it means we should not have
+     needed the CWD for that test as the test was for an absolute path,
+     and so if we see that here return 0, simulating a
+     GetCurrentDirectory() error.  */
+  if (strcmp (testsuite_tests[curtest].cwd, NO_CWD) == 0)
+    return 0;
+
+  if (nBufferLength >= len)
+    {
+      strcpy (lpBuffer, testsuite_tests[curtest].cwd);
+      return len - 1;
+    }
+  return len;
+}
+
+extern char *cygpath (const char *s, ...);
+
+int
+main (int argc, char **argv)
+{
+  int numpass = 0;
+
+  for (test_t &t = testsuite_tests[curtest]; t.posix; t = testsuite_tests[++curtest])
+    {
+      char *result = cygpath (t.posix, NULL);
+      bool pass = (strcmp (result, t.win32) == 0);
+      
+      if (pass)
+        {
+          numpass++;
+          printf ("test %03d: PASS cwd=%-18s input=%-22s expected+actual=%s\n",
+                  curtest, t.cwd, t.posix, result);
+        }
+      else
+        {
+          printf ("test %03d: FAIL cwd=%-18s input=%-29s expected=%-25s actual=%s\n",
+                  curtest, t.cwd, t.posix, t.win32, result);
+        }
+    }
+  printf ("\n"
+          "total tests: %d\n"
+          "pass       : %d (%.1f%%)\n"
+          "fail       : %d (%.1f%%)\n",
+          curtest, numpass, ((float)numpass)/curtest * 100.0F, curtest - numpass,
+          ((float)curtest - numpass)/curtest * 100.0F);
+  return (numpass < curtest ? 1 : 0);
+}