tests/extmod: Add tests for verifying FAT and littlefs mtime values.

Verifies mtime timestamps on files match the value returned by time.time().

Also update vfs_fat_ramdisk.py so it doesn't check FAT timestamp of the
root, because that may change across runs/ports.

Signed-off-by: Damien George <damien@micropython.org>

1 files changed, 8 insertions, 1 deletions

diff --git a/tests/extmod/vfs_lfs_mtime.py b/tests/extmod/vfs_lfs_mtime.py
index 0108076884..bacdd2246c 100644
--- a/tests/extmod/vfs_lfs_mtime.py
+++ b/tests/extmod/vfs_lfs_mtime.py
@@ -3,6 +3,7 @@
 try:
     import utime, uos
 
+    utime.time
     utime.sleep
     uos.VfsLfs2
 except (ImportError, AttributeError):
@@ -46,6 +47,7 @@ def test(bdev, vfs_class):
     vfs = vfs_class(bdev, mtime=True)
 
     # Create an empty file, should have a timestamp.
+    current_time = int(utime.time())
     vfs.open("test1", "wt").close()
 
     # Wait 1 second so mtime will increase by at least 1.
@@ -54,10 +56,15 @@ def test(bdev, vfs_class):
     # Create another empty file, should have a timestamp.
     vfs.open("test2", "wt").close()
 
-    # Stat the files and check that test1 is older than test2.
+    # Stat the files and check mtime is non-zero.
     stat1 = vfs.stat("test1")
     stat2 = vfs.stat("test2")
     print(stat1[8] != 0, stat2[8] != 0)
+
+    # Check that test1 has mtime which matches time.time() at point of creation.
+    print(current_time <= stat1[8] <= current_time + 1)
+
+    # Check that test1 is older than test2.
     print(stat1[8] < stat2[8])
 
     # Wait 1 second so mtime will increase by at least 1.