git/t/t4211/expect.multiple-superset
Eric Sunshine 18d472db6f t4211: fix broken test when one -L range is subset of another
t4211 attempts to test multiple git-log -L ranges where one range is a
superset of the other, and falsely succeeds because its "expected"
output is incorrect.

Overlapping -L ranges handed to git-log are coalesced by
line-log.c:sort_and_merge_range_set() into a set of non-overlapping,
disjoint ranges. When one range is a subset of another,
sort_and_merge_range_set() should coalesce both ranges to the superset
range, but instead the coalesced range often is incorrectly truncated to
the end of the subset range. For example, ranges 2-8 and 3-4 are
coalesced incorrectly to 2-4.

One can observe this incorrect behavior with git-log -L using the test
repository created by t4211. The superset/subset ranges t4211 employs
are 4-$ and 8-12 (where $ represents end-of-file). The coalesced range
should be 4-$. Manually invoking git-log with the same ranges the test
employs, we see:

  % git log -L 4:a.c simple |
    awk '/^commit [0-9a-f]{40}/ { print substr($2,1,7) }'
  4659538
  100b61a
  39b6eb2
  a6eb826
  f04fb20
  de4c48a

  % git log -L 8,12:a.c simple | awk ...
  f04fb20
  de4c48a

  % git log -L 4:a.c -L 8,12:a.c simple | awk ...
  a6eb826
  f04fb20
  de4c48a

This last output is incorrect. 8-12 is a subset of 4-$, hence the output
of the coalesced range should be the same as the 4-$ output shown first.
In fact, the above incorrect output is the truncated bogus range 4-12:

  % git log -L 4,12:a.c simple | awk ...
  a6eb826
  f04fb20
  de4c48a

Fix the test to correctly fail in the presence of the
sort_and_merge_range_set() coalescing bug. Do so by changing the
"expected" output to the commits mentioned in the 4-$ output above.

Signed-off-by: Eric Sunshine <sunshine@sunshineco.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2013-07-09 09:24:59 -07:00

188 lines
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commit 4659538844daa2849b1a9e7d6fadb96fcd26fc83
Author: Thomas Rast <trast@student.ethz.ch>
Date: Thu Feb 28 10:48:43 2013 +0100
change back to complete line
diff --git a/a.c b/a.c
--- a/a.c
+++ b/a.c
@@ -4,19 +4,21 @@
long f(long x)
{
int s = 0;
while (x) {
x >>= 1;
s++;
}
return s;
}
/*
* This is only an example!
*/
int main ()
{
printf("%ld\n", f(15));
return 0;
-}
\ No newline at end of file
+}
+
+/* incomplete lines are bad! */
commit 100b61a6f2f720f812620a9d10afb3a960ccb73c
Author: Thomas Rast <trast@student.ethz.ch>
Date: Thu Feb 28 10:48:10 2013 +0100
change to an incomplete line at end
diff --git a/a.c b/a.c
--- a/a.c
+++ b/a.c
@@ -4,19 +4,19 @@
long f(long x)
{
int s = 0;
while (x) {
x >>= 1;
s++;
}
return s;
}
/*
* This is only an example!
*/
int main ()
{
printf("%ld\n", f(15));
return 0;
-}
+}
\ No newline at end of file
commit 39b6eb2d5b706d3322184a169f666f25ed3fbd00
Author: Thomas Rast <trast@student.ethz.ch>
Date: Thu Feb 28 10:45:41 2013 +0100
touch comment
diff --git a/a.c b/a.c
--- a/a.c
+++ b/a.c
@@ -3,19 +3,19 @@
long f(long x)
{
int s = 0;
while (x) {
x >>= 1;
s++;
}
return s;
}
/*
- * A comment.
+ * This is only an example!
*/
int main ()
{
printf("%ld\n", f(15));
return 0;
}
commit a6eb82647d5d67f893da442f8f9375fd89a3b1e2
Author: Thomas Rast <trast@student.ethz.ch>
Date: Thu Feb 28 10:45:16 2013 +0100
touch both functions
diff --git a/a.c b/a.c
--- a/a.c
+++ b/a.c
@@ -3,19 +3,19 @@
-int f(int x)
+long f(long x)
{
int s = 0;
while (x) {
x >>= 1;
s++;
}
return s;
}
/*
* A comment.
*/
int main ()
{
- printf("%d\n", f(15));
+ printf("%ld\n", f(15));
return 0;
}
commit f04fb20f2c77850996cba739709acc6faecc58f7
Author: Thomas Rast <trast@student.ethz.ch>
Date: Thu Feb 28 10:44:55 2013 +0100
change f()
diff --git a/a.c b/a.c
--- a/a.c
+++ b/a.c
@@ -3,18 +3,19 @@
int f(int x)
{
int s = 0;
while (x) {
x >>= 1;
s++;
}
+ return s;
}
/*
* A comment.
*/
int main ()
{
printf("%d\n", f(15));
return 0;
}
commit de4c48ae814792c02a49c4c3c0c757ae69c55f6a
Author: Thomas Rast <trast@student.ethz.ch>
Date: Thu Feb 28 10:44:48 2013 +0100
initial
diff --git a/a.c b/a.c
--- /dev/null
+++ b/a.c
@@ -0,0 +3,18 @@
+int f(int x)
+{
+ int s = 0;
+ while (x) {
+ x >>= 1;
+ s++;
+ }
+}
+
+/*
+ * A comment.
+ */
+
+int main ()
+{
+ printf("%d\n", f(15));
+ return 0;
+}