diff tests/test-evolve-obshistory.t @ 2407:783a74c60a5e

obshistory: add a graph option on the debugobshistory command

Add a graph option (--graph) to the debugobshistory. The output is
like the 'hg log -G' output. The option is activated by default but
can be deactivated with '--no-graph' option.

There are various issue with the current implementation (multiple cycles
handling, N² complexity) but this can be fixed later.

--- a/tests/test-evolve-obshistory.t	Thu May 18 11:29:23 2017 +0200
+++ b/tests/test-evolve-obshistory.t	Thu May 18 11:29:27 2017 +0200
@@ -54,10 +54,12 @@
 Actual test
 -----------
   $ hg debugobshistory 4ae3a4151de9
-  4ae3a4151de9 (3) A1
-  471f378eab4c (1) A0
-    rewritten by test (*20*) as 4ae3a4151de9 (glob)
-  $ hg debugobshistory 4ae3a4151de9 -Tjson | python -m json.tool
+  @  4ae3a4151de9 (3) A1
+  |
+  x  471f378eab4c (1) A0
+       rewritten by test (*20*) as 4ae3a4151de9 (glob)
+  
+  $ hg debugobshistory 4ae3a4151de9 --no-graph -Tjson | python -m json.tool
   [
       {
           "debugobshistory.markers": [],
@@ -85,9 +87,10 @@
       }
   ]
   $ hg debugobshistory --hidden 471f378eab4c
-  471f378eab4c (1) A0
-    rewritten by test (*20*) as 4ae3a4151de9 (glob)
-  $ hg debugobshistory --hidden 471f378eab4c -Tjson | python -m json.tool
+  x  471f378eab4c (1) A0
+       rewritten by test (*20*) as 4ae3a4151de9 (glob)
+  
+  $ hg debugobshistory --hidden 471f378eab4c --no-graph -Tjson | python -m json.tool
   [
       {
           "debugobshistory.markers": [
@@ -171,9 +174,10 @@
 -----------
 
   $ hg debugobshistory 'desc(B0)' --hidden
-  0dec01379d3b (2) B0
-    pruned by test (*20*) (glob)
-  $ hg debugobshistory 'desc(B0)' --hidden -Tjson | python -m json.tool
+  x  0dec01379d3b (2) B0
+       pruned by test (*20*) (glob)
+  
+  $ hg debugobshistory 'desc(B0)' --hidden --no-graph -Tjson | python -m json.tool
   [
       {
           "debugobshistory.markers": [
@@ -192,8 +196,9 @@
       }
   ]
   $ hg debugobshistory 'desc(A0)'
-  471f378eab4c (1) A0
-  $ hg debugobshistory 'desc(A0)' -Tjson | python -m json.tool
+  @  471f378eab4c (1) A0
+  
+  $ hg debugobshistory 'desc(A0)' --no-graph -Tjson | python -m json.tool
   [
       {
           "debugobshistory.markers": [],
@@ -300,10 +305,12 @@
 Actual test
 -----------
 
+Check that debugobshistory on splitted commit show both targets
   $ hg debugobshistory 471597cad322 --hidden
-  471597cad322 (1) A0
-    rewritten by test (*20*) as 337fec4d2edc, f257fde29c7a (glob)
-  $ hg debugobshistory 471597cad322 --hidden -Tjson | python -m json.tool
+  x  471597cad322 (1) A0
+       rewritten by test (*20*) as 337fec4d2edc, f257fde29c7a (glob)
+  
+  $ hg debugobshistory 471597cad322 --hidden --no-graph -Tjson | python -m json.tool
   [
       {
           "debugobshistory.markers": [
@@ -325,70 +332,32 @@
           "debugobshistory.shortdescription": "A0"
       }
   ]
+Check that debugobshistory on the first successor after split show
+the revision plus the splitted one
   $ hg debugobshistory 337fec4d2edc
-  337fec4d2edc (2) A0
-  471597cad322 (1) A0
-    rewritten by test (*20*) as 337fec4d2edc, f257fde29c7a (glob)
-  $ hg debugobshistory 337fec4d2edc -Tjson | python -m json.tool
-  [
-      {
-          "debugobshistory.markers": [],
-          "debugobshistory.node": "337fec4d2edc",
-          "debugobshistory.rev": 2,
-          "debugobshistory.shortdescription": "A0"
-      },
-      {
-          "debugobshistory.markers": [
-              {
-                  "debugobshistory.marker_date": [
-                      *, (glob)
-                      0 (glob)
-                  ],
-                  "debugobshistory.marker_user": "test",
-                  "debugobshistory.succnodes": [
-                      "337fec4d2edc",
-                      "f257fde29c7a"
-                  ],
-                  "debugobshistory.verb": "rewritten"
-              }
-          ],
-          "debugobshistory.node": "471597cad322",
-          "debugobshistory.rev": 1,
-          "debugobshistory.shortdescription": "A0"
-      }
-  ]
+  o  337fec4d2edc (2) A0
+  |
+  x  471597cad322 (1) A0
+       rewritten by test (*20*) as 337fec4d2edc, f257fde29c7a (glob)
+  
+Check that debugobshistory on the second successor after split show
+the revision plus the splitted one
   $ hg debugobshistory f257fde29c7a
-  f257fde29c7a (3) A0
-  471597cad322 (1) A0
-    rewritten by test (*20*) as 337fec4d2edc, f257fde29c7a (glob)
-  $ hg debugobshistory f257fde29c7a -Tjson | python -m json.tool
-  [
-      {
-          "debugobshistory.markers": [],
-          "debugobshistory.node": "f257fde29c7a",
-          "debugobshistory.rev": 3,
-          "debugobshistory.shortdescription": "A0"
-      },
-      {
-          "debugobshistory.markers": [
-              {
-                  "debugobshistory.marker_date": [
-                      *, (glob)
-                      0 (glob)
-                  ],
-                  "debugobshistory.marker_user": "test",
-                  "debugobshistory.succnodes": [
-                      "337fec4d2edc",
-                      "f257fde29c7a"
-                  ],
-                  "debugobshistory.verb": "rewritten"
-              }
-          ],
-          "debugobshistory.node": "471597cad322",
-          "debugobshistory.rev": 1,
-          "debugobshistory.shortdescription": "A0"
-      }
-  ]
+  @  f257fde29c7a (3) A0
+  |
+  x  471597cad322 (1) A0
+       rewritten by test (*20*) as 337fec4d2edc, f257fde29c7a (glob)
+  
+Check that debugobshistory on both successors after split show
+a coherent graph
+  $ hg debugobshistory 'f257fde29c7a+337fec4d2edc'
+  o  337fec4d2edc (2) A0
+  |
+  | @  f257fde29c7a (3) A0
+  |/
+  x  471597cad322 (1) A0
+       rewritten by test (*20*) as 337fec4d2edc, f257fde29c7a (glob)
+  
   $ hg update 471597cad322
   abort: hidden revision '471597cad322'!
   (use --hidden to access hidden revisions; successors: 337fec4d2edc, f257fde29c7a)
@@ -552,9 +521,10 @@
 -----------
 
   $ hg debugobshistory de7290d8b885 --hidden
-  de7290d8b885 (1) A0
-    rewritten by test (*20*) as 1ae8bc733a14, 337fec4d2edc, c7f044602e9b, f257fde29c7a (glob)
-  $ hg debugobshistory de7290d8b885 --hidden -Tjson | python -m json.tool
+  x  de7290d8b885 (1) A0
+       rewritten by test (*20*) as 1ae8bc733a14, 337fec4d2edc, c7f044602e9b, f257fde29c7a (glob)
+  
+  $ hg debugobshistory de7290d8b885 --hidden --no-graph -Tjson | python -m json.tool
   [
       {
           "debugobshistory.markers": [
@@ -579,10 +549,12 @@
       }
   ]
   $ hg debugobshistory c7f044602e9b
-  c7f044602e9b (5) A0
-  de7290d8b885 (1) A0
-    rewritten by test (*20*) as 1ae8bc733a14, 337fec4d2edc, c7f044602e9b, f257fde29c7a (glob)
-  $ hg debugobshistory c7f044602e9b -Tjson | python -m json.tool
+  @  c7f044602e9b (5) A0
+  |
+  x  de7290d8b885 (1) A0
+       rewritten by test (*20*) as 1ae8bc733a14, 337fec4d2edc, c7f044602e9b, f257fde29c7a (glob)
+  
+  $ hg debugobshistory c7f044602e9b --no-graph -Tjson | python -m json.tool
   [
       {
           "debugobshistory.markers": [],
@@ -612,13 +584,19 @@
           "debugobshistory.shortdescription": "A0"
       }
   ]
-  $ hg debugobshistory 2:5
-  337fec4d2edc (2) A0
-  de7290d8b885 (1) A0
-    rewritten by test (*20*) as 1ae8bc733a14, 337fec4d2edc, c7f044602e9b, f257fde29c7a (glob)
-  f257fde29c7a (3) A0
-  1ae8bc733a14 (4) A0
-  c7f044602e9b (5) A0
+Check that debugobshistory on all heads show a coherent graph
+  $ hg debugobshistory 2::5
+  o  1ae8bc733a14 (4) A0
+  |
+  | o  337fec4d2edc (2) A0
+  |/
+  | @  c7f044602e9b (5) A0
+  |/
+  | o  f257fde29c7a (3) A0
+  |/
+  x  de7290d8b885 (1) A0
+       rewritten by test (*20*) as 1ae8bc733a14, 337fec4d2edc, c7f044602e9b, f257fde29c7a (glob)
+  
   $ hg update de7290d8b885
   abort: hidden revision 'de7290d8b885'!
   (use --hidden to access hidden revisions; successors: 337fec4d2edc, f257fde29c7a and 2 more)
@@ -685,61 +663,30 @@
  Actual test
  -----------
 
+Check that debugobshistory on the first folded revision show only
+the revision with the target
   $ hg debugobshistory --hidden 471f378eab4c
-  471f378eab4c (1) A0
-    rewritten by test (*20*) as eb5a0daa2192 (glob)
-  $ hg debugobshistory --hidden 471f378eab4c -Tjson | python -m json.tool
-  [
-      {
-          "debugobshistory.markers": [
-              {
-                  "debugobshistory.marker_date": [
-                      *, (glob)
-                      0 (glob)
-                  ],
-                  "debugobshistory.marker_user": "test",
-                  "debugobshistory.succnodes": [
-                      "eb5a0daa2192"
-                  ],
-                  "debugobshistory.verb": "rewritten"
-              }
-          ],
-          "debugobshistory.node": "471f378eab4c",
-          "debugobshistory.rev": 1,
-          "debugobshistory.shortdescription": "A0"
-      }
-  ]
+  x  471f378eab4c (1) A0
+       rewritten by test (*20*) as eb5a0daa2192 (glob)
+  
+Check that debugobshistory on the second folded revision show only
+the revision with the target
   $ hg debugobshistory --hidden 0dec01379d3b
-  0dec01379d3b (2) B0
-    rewritten by test (*20*) as eb5a0daa2192 (glob)
-  $ hg debugobshistory --hidden 0dec01379d3b -Tjson | python -m json.tool
-  [
-      {
-          "debugobshistory.markers": [
-              {
-                  "debugobshistory.marker_date": [
-                      *, (glob)
-                      0 (glob)
-                  ],
-                  "debugobshistory.marker_user": "test",
-                  "debugobshistory.succnodes": [
-                      "eb5a0daa2192"
-                  ],
-                  "debugobshistory.verb": "rewritten"
-              }
-          ],
-          "debugobshistory.node": "0dec01379d3b",
-          "debugobshistory.rev": 2,
-          "debugobshistory.shortdescription": "B0"
-      }
-  ]
+  x  0dec01379d3b (2) B0
+       rewritten by test (*20*) as eb5a0daa2192 (glob)
+  
+Check that debugobshistory on the successor revision show a coherent
+graph
   $ hg debugobshistory eb5a0daa2192
-  eb5a0daa2192 (3) C0
-  471f378eab4c (1) A0
-    rewritten by test (*20*) as eb5a0daa2192 (glob)
-  0dec01379d3b (2) B0
-    rewritten by test (*20*) as eb5a0daa2192 (glob)
-  $ hg debugobshistory eb5a0daa2192 -Tjson | python -m json.tool
+  @    eb5a0daa2192 (3) C0
+  |\
+  x |  0dec01379d3b (2) B0
+   /     rewritten by test (*20*) as eb5a0daa2192 (glob)
+  |
+  x  471f378eab4c (1) A0
+       rewritten by test (*20*) as eb5a0daa2192 (glob)
+  
+  $ hg debugobshistory eb5a0daa2192 --no-graph -Tjson | python -m json.tool
   [
       {
           "debugobshistory.markers": [],
@@ -867,11 +814,13 @@
 Actual test
 -----------
 
+Check that debugobshistory on the divergent revision show both destinations
   $ hg debugobshistory --hidden 471f378eab4c
-  471f378eab4c (1) A0
-    rewritten by test (*20*) as 65b757b745b9 (glob)
-    rewritten by test (*20*) as fdf9bde5129a (glob)
-  $ hg debugobshistory --hidden 471f378eab4c -Tjson | python -m json.tool
+  x  471f378eab4c (1) A0
+       rewritten by test (*20*) as 65b757b745b9 (glob)
+       rewritten by test (*20*) as fdf9bde5129a (glob)
+  
+  $ hg debugobshistory --hidden 471f378eab4c --no-graph -Tjson | python -m json.tool
   [
       {
           "debugobshistory.markers": [
@@ -903,55 +852,36 @@
           "debugobshistory.shortdescription": "A0"
       }
   ]
+Check that debugobshistory on the first diverged revision show the revision
+and the diverent one
   $ hg debugobshistory fdf9bde5129a
-  fdf9bde5129a (2) A1
-  471f378eab4c (1) A0
-    rewritten by test (*20*) as 65b757b745b9 (glob)
-    rewritten by test (*20*) as fdf9bde5129a (glob)
-  $ hg debugobshistory fdf9bde5129a -Tjson | python -m json.tool
-  [
-      {
-          "debugobshistory.markers": [],
-          "debugobshistory.node": "fdf9bde5129a",
-          "debugobshistory.rev": 2,
-          "debugobshistory.shortdescription": "A1"
-      },
-      {
-          "debugobshistory.markers": [
-              {
-                  "debugobshistory.marker_date": [
-                      *, (glob)
-                      0 (glob)
-                  ],
-                  "debugobshistory.marker_user": "test",
-                  "debugobshistory.succnodes": [
-                      "65b757b745b9"
-                  ],
-                  "debugobshistory.verb": "rewritten"
-              },
-              {
-                  "debugobshistory.marker_date": [
-                      *, (glob)
-                      0 (glob)
-                  ],
-                  "debugobshistory.marker_user": "test",
-                  "debugobshistory.succnodes": [
-                      "fdf9bde5129a"
-                  ],
-                  "debugobshistory.verb": "rewritten"
-              }
-          ],
-          "debugobshistory.node": "471f378eab4c",
-          "debugobshistory.rev": 1,
-          "debugobshistory.shortdescription": "A0"
-      }
-  ]
+  o  fdf9bde5129a (2) A1
+  |
+  x  471f378eab4c (1) A0
+       rewritten by test (*20*) as 65b757b745b9 (glob)
+       rewritten by test (*20*) as fdf9bde5129a (glob)
+  
+Check that debugobshistory on the second diverged revision show the revision
+and the diverent one
   $ hg debugobshistory 65b757b745b9
-  65b757b745b9 (3) A2
-  471f378eab4c (1) A0
-    rewritten by test (*20*) as 65b757b745b9 (glob)
-    rewritten by test (*20*) as fdf9bde5129a (glob)
-  $ hg debugobshistory 65b757b745b9 -Tjson | python -m json.tool
+  @  65b757b745b9 (3) A2
+  |
+  x  471f378eab4c (1) A0
+       rewritten by test (*20*) as 65b757b745b9 (glob)
+       rewritten by test (*20*) as fdf9bde5129a (glob)
+  
+Check that debugobshistory on the both diverged revision show a coherent
+graph
+  $ hg debugobshistory '65b757b745b9+fdf9bde5129a'
+  @  65b757b745b9 (3) A2
+  |
+  | o  fdf9bde5129a (2) A1
+  |/
+  x  471f378eab4c (1) A0
+       rewritten by test (*20*) as 65b757b745b9 (glob)
+       rewritten by test (*20*) as fdf9bde5129a (glob)
+  
+  $ hg debugobshistory '65b757b745b9+fdf9bde5129a' --no-graph -Tjson | python -m json.tool
   [
       {
           "debugobshistory.markers": [],
@@ -987,6 +917,12 @@
           "debugobshistory.node": "471f378eab4c",
           "debugobshistory.rev": 1,
           "debugobshistory.shortdescription": "A0"
+      },
+      {
+          "debugobshistory.markers": [],
+          "debugobshistory.node": "fdf9bde5129a",
+          "debugobshistory.rev": 2,
+          "debugobshistory.shortdescription": "A1"
       }
   ]
   $ hg update 471f378eab4c
@@ -1068,63 +1004,20 @@
  Actual test
  -----------
 
-  $ hg debugobshistory --hidden 471f378eab4c
-  471f378eab4c (1) A0
-    rewritten by test (*20*) as eb5a0daa2192 (glob)
-  $ hg debugobshistory --hidden 471f378eab4c -Tjson | python -m json.tool
-  [
-      {
-          "debugobshistory.markers": [
-              {
-                  "debugobshistory.marker_date": [
-                      *, (glob)
-                      0 (glob)
-                  ],
-                  "debugobshistory.marker_user": "test",
-                  "debugobshistory.succnodes": [
-                      "eb5a0daa2192"
-                  ],
-                  "debugobshistory.verb": "rewritten"
-              }
-          ],
-          "debugobshistory.node": "471f378eab4c",
-          "debugobshistory.rev": 1,
-          "debugobshistory.shortdescription": "A0"
-      }
-  ]
-  $ hg debugobshistory --hidden 0dec01379d3b
-  0dec01379d3b (2) B0
-    rewritten by test (*20*) as b7ea6d14e664 (glob)
-  $ hg debugobshistory --hidden 0dec01379d3b -Tjson | python -m json.tool
-  [
-      {
-          "debugobshistory.markers": [
-              {
-                  "debugobshistory.marker_date": [
-                      *, (glob)
-                      0 (glob)
-                  ],
-                  "debugobshistory.marker_user": "test",
-                  "debugobshistory.succnodes": [
-                      "b7ea6d14e664"
-                  ],
-                  "debugobshistory.verb": "rewritten"
-              }
-          ],
-          "debugobshistory.node": "0dec01379d3b",
-          "debugobshistory.rev": 2,
-          "debugobshistory.shortdescription": "B0"
-      }
-  ]
+Check that debugobshistory on head show a coherent graph
   $ hg debugobshistory eb5a0daa2192
-  eb5a0daa2192 (4) C0
-  b7ea6d14e664 (3) B1
-    rewritten by test (*20*) as eb5a0daa2192 (glob)
-  0dec01379d3b (2) B0
-    rewritten by test (*20*) as b7ea6d14e664 (glob)
-  471f378eab4c (1) A0
-    rewritten by test (*20*) as eb5a0daa2192 (glob)
-  $ hg debugobshistory eb5a0daa2192 -Tjson | python -m json.tool
+  @    eb5a0daa2192 (4) C0
+  |\
+  x |  471f378eab4c (1) A0
+   /     rewritten by test (*20*) as eb5a0daa2192 (glob)
+  |
+  x  b7ea6d14e664 (3) B1
+  |    rewritten by test (*20*) as eb5a0daa2192 (glob)
+  |
+  x  0dec01379d3b (2) B0
+       rewritten by test (*20*) as b7ea6d14e664 (glob)
+  
+  $ hg debugobshistory eb5a0daa2192 --no-graph -Tjson | python -m json.tool
   [
       {
           "debugobshistory.markers": [],
@@ -1277,11 +1170,14 @@
  -----------
 
   $ hg debugobshistory 7a230b46bf61
-  7a230b46bf61 (3) A2
-  fdf9bde5129a (2) A1
-    rewritten by test (*20*) as 7a230b46bf61 (glob)
-  471f378eab4c (1) A0
-    rewritten by test (*20*) as fdf9bde5129a (glob)
+  @  7a230b46bf61 (3) A2
+  |
+  x  fdf9bde5129a (2) A1
+  |    rewritten by test (*20*) as 7a230b46bf61 (glob)
+  |
+  x  471f378eab4c (1) A0
+       rewritten by test (*20*) as fdf9bde5129a (glob)
+  
   $ cd $TESTTMP/local-remote-markers-2
   $ hg pull
   pulling from $TESTTMP/local-remote-markers-1
@@ -1294,15 +1190,125 @@
   (run 'hg heads' to see heads, 'hg merge' to merge)
   working directory parent is obsolete! (471f378eab4c)
   (use 'hg evolve' to update to its successor: 7a230b46bf61)
-  $ hg debugobshistory 7a230b46bf61 --traceback
-  7a230b46bf61 (2) A2
-  fdf9bde5129a
-    rewritten by test (*20*) as 7a230b46bf61 (glob)
-  471f378eab4c (1) A0
-    rewritten by test (*20*) as fdf9bde5129a (glob)
+Check that debugobshistory works with markers pointing to missing local
+changectx
+  $ hg debugobshistory 7a230b46bf61
+  o  7a230b46bf61 (2) A2
+  |
+  x  fdf9bde5129a
+  |    rewritten by test (*20*) as 7a230b46bf61 (glob)
+  |
+  @  471f378eab4c (1) A0
+       rewritten by test (*20*) as fdf9bde5129a (glob)
+  
   $ hg debugobshistory 7a230b46bf61 --color=debug
-  [evolve.node|7a230b46bf61] [evolve.rev|(2)] [evolve.short_description|A2]
-  [evolve.node evolve.missing_change_ctx|fdf9bde5129a]
-    [evolve.verb|rewritten] by [evolve.user|test] [evolve.date|(*20*)] as [evolve.node|7a230b46bf61] (glob)
-  [evolve.node|471f378eab4c] [evolve.rev|(1)] [evolve.short_description|A0]
-    [evolve.verb|rewritten] by [evolve.user|test] [evolve.date|(*20*)] as [evolve.node|fdf9bde5129a] (glob)
+  o  [evolve.node|7a230b46bf61] [evolve.rev|(2)] [evolve.short_description|A2]
+  |
+  x  [evolve.node evolve.missing_change_ctx|fdf9bde5129a]
+  |    [evolve.verb|rewritten] by [evolve.user|test] [evolve.date|(*20*)] as [evolve.node|7a230b46bf61] (glob)
+  |
+  @  [evolve.node|471f378eab4c] [evolve.rev|(1)] [evolve.short_description|A0]
+       [evolve.verb|rewritten] by [evolve.user|test] [evolve.date|(*20*)] as [evolve.node|fdf9bde5129a] (glob)
+  
+
+Test with cycle
+===============
+
+Test setup
+----------
+
+  $ hg init $TESTTMP/cycle
+  $ cd $TESTTMP/cycle
+  $ mkcommit ROOT
+  $ mkcommit A
+  $ mkcommit B
+  $ mkcommit C
+  $ hg log -G
+  @  changeset:   3:a8df460dbbfe
+  |  tag:         tip
+  |  user:        test
+  |  date:        Thu Jan 01 00:00:00 1970 +0000
+  |  summary:     C
+  |
+  o  changeset:   2:c473644ee0e9
+  |  user:        test
+  |  date:        Thu Jan 01 00:00:00 1970 +0000
+  |  summary:     B
+  |
+  o  changeset:   1:2a34000d3544
+  |  user:        test
+  |  date:        Thu Jan 01 00:00:00 1970 +0000
+  |  summary:     A
+  |
+  o  changeset:   0:ea207398892e
+     user:        test
+     date:        Thu Jan 01 00:00:00 1970 +0000
+     summary:     ROOT
+  
+Create a cycle
+  $ hg prune -s 2 1
+  1 changesets pruned
+  2 new unstable changesets
+  $ hg prune -s 3 2
+  1 changesets pruned
+  $ hg prune -s 1 3
+  0 files updated, 0 files merged, 2 files removed, 0 files unresolved
+  working directory now at 2a34000d3544
+  1 changesets pruned
+  $ hg log --hidden -G
+  x  changeset:   3:a8df460dbbfe
+  |  tag:         tip
+  |  user:        test
+  |  date:        Thu Jan 01 00:00:00 1970 +0000
+  |  summary:     C
+  |
+  x  changeset:   2:c473644ee0e9
+  |  user:        test
+  |  date:        Thu Jan 01 00:00:00 1970 +0000
+  |  summary:     B
+  |
+  @  changeset:   1:2a34000d3544
+  |  user:        test
+  |  date:        Thu Jan 01 00:00:00 1970 +0000
+  |  summary:     A
+  |
+  o  changeset:   0:ea207398892e
+     user:        test
+     date:        Thu Jan 01 00:00:00 1970 +0000
+     summary:     ROOT
+  
+Actual test
+-----------
+
+Check that debugobshistory never crash on a cycle
+
+  $ hg debugobshistory 1 --hidden
+  @  2a34000d3544 (1) A
+  |    rewritten by test (*20*) as c473644ee0e9 (glob)
+  |
+  x  a8df460dbbfe (3) C
+  |    rewritten by test (*20*) as 2a34000d3544 (glob)
+  |
+  x  c473644ee0e9 (2) B
+  |    rewritten by test (*20*) as a8df460dbbfe (glob)
+  |
+  $ hg debugobshistory 2 --hidden
+  @  2a34000d3544 (1) A
+  |    rewritten by test (*20*) as c473644ee0e9 (glob)
+  |
+  x  a8df460dbbfe (3) C
+  |    rewritten by test (*20*) as 2a34000d3544 (glob)
+  |
+  x  c473644ee0e9 (2) B
+  |    rewritten by test (*20*) as a8df460dbbfe (glob)
+  |
+  $ hg debugobshistory 3 --hidden
+  @  2a34000d3544 (1) A
+  |    rewritten by test (*20*) as c473644ee0e9 (glob)
+  |
+  x  a8df460dbbfe (3) C
+  |    rewritten by test (*20*) as 2a34000d3544 (glob)
+  |
+  x  c473644ee0e9 (2) B
+  |    rewritten by test (*20*) as a8df460dbbfe (glob)
+  |