Fix KeyError in MountPoint.__repr__() if mount does not exist

test/test_modules.py

@@ -482,12 +482,14 @@ def test_supervisor(host, supervisorctl_path, supervisorctl_conf):
 def test_mountpoint(host):
     root_mount = host.mount_point("/")
     assert root_mount.exists
+    assert repr(root_mount)
     assert isinstance(root_mount.options, list)
     assert "rw" in root_mount.options
     assert root_mount.filesystem
 
     fake_mount = host.mount_point("/fake/mount")
     assert not fake_mount.exists
+    assert repr(fake_mount)
 
     mountpoints = host.mount_point.get_mountpoints()
     assert mountpoints

testinfra/modules/mountpoint.py

@@ -101,13 +101,17 @@ def get_module_class(cls, host):
         raise NotImplementedError
 
     def __repr__(self):
+        if self.exists:
+            d = self.device
+            f = self.filesystem
+            o = ",".join(self.options)
+        else:
+            d = ""
+            f = ""
+            o = ""
         return (
-            "<MountPoint(path={}, device={}, filesystem={}, " "options={})>"
-        ).format(
-            self.path,
-            self.device,
-            self.filesystem,
-            ",".join(self.options),
+            f'<MountPoint(path="{self.path}", exists={self.exists}, device="{d}", '
+            f'filesystem="{f}", options="{o}") at 0x{id(self):08x}>'
         )