[PATCH v6 3/8] t0006 & t5000: skip "far in the future" test when time_t is too limited

[Johannes Schindelin]

Git's source code refers to timestamps as unsigned long, which is
ill-defined, as there is no guarantee about the number of bits that
data type has.

In preparation of switching to another data type that is large enough
to hold "far in the future" dates, we need to prepare the t0006-date.sh
script for the case where we *still* cannot format those dates if the
system library uses 32-bit time_t.

Signed-off-by: Johannes Schindelin <johannes.schinde...@gmx.de>
---
 t/helper/test-date.c | 5 ++++-
 t/t0006-date.sh      | 4 ++--
 t/t5000-tar-tree.sh  | 2 +-
 t/test-lib.sh        | 1 +
 4 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/t/helper/test-date.c b/t/helper/test-date.c
index 4727bea255c..ac7c66c733b 100644
--- a/t/helper/test-date.c
+++ b/t/helper/test-date.c
@@ -5,7 +5,8 @@ static const char *usage_msg = "\n"
 "  test-date show:<format> [time_t]...\n"
 "  test-date parse [date]...\n"
 "  test-date approxidate [date]...\n"
-"  test-date is64bit\n";
+"  test-date is64bit\n"
+"  test-date time_t-is64bit\n";
 
 static void show_relative_dates(const char **argv, struct timeval *now)
 {
@@ -96,6 +97,8 @@ int cmd_main(int argc, const char **argv)
                parse_approxidate(argv+1, &now);
        else if (!strcmp(*argv, "is64bit"))
                return sizeof(unsigned long) == 8 ? 0 : 1;
+       else if (!strcmp(*argv, "time_t-is64bit"))
+               return sizeof(time_t) == 8 ? 0 : 1;
        else
                usage(usage_msg);
        return 0;
diff --git a/t/t0006-date.sh b/t/t0006-date.sh
index 9539b425ffb..42d4ea61ef5 100755
--- a/t/t0006-date.sh
+++ b/t/t0006-date.sh
@@ -53,8 +53,8 @@ check_show unix-local "$TIME" '1466000000'
 
 # arbitrary time absurdly far in the future
 FUTURE="5758122296 -0400"
-check_show iso       "$FUTURE" "2152-06-19 18:24:56 -0400" TIME_IS_64BIT
-check_show iso-local "$FUTURE" "2152-06-19 22:24:56 +0000" TIME_IS_64BIT
+check_show iso       "$FUTURE" "2152-06-19 18:24:56 -0400" 
TIME_IS_64BIT,TIME_T_IS_64BIT
+check_show iso-local "$FUTURE" "2152-06-19 22:24:56 +0000" 
TIME_IS_64BIT,TIME_T_IS_64BIT
 
 check_parse() {
        echo "$1 -> $2" >expect
diff --git a/t/t5000-tar-tree.sh b/t/t5000-tar-tree.sh
index 997aa9dea28..fe2d4f15a73 100755
--- a/t/t5000-tar-tree.sh
+++ b/t/t5000-tar-tree.sh
@@ -402,7 +402,7 @@ test_expect_success TIME_IS_64BIT 'generate tar with future 
mtime' '
        git archive HEAD >future.tar
 '
 
-test_expect_success TAR_HUGE,TIME_IS_64BIT 'system tar can read our future 
mtime' '
+test_expect_success TAR_HUGE,TIME_IS_64BIT,TIME_T_IS_64BIT 'system tar can 
read our future mtime' '
        echo 4147 >expect &&
        tar_info future.tar | cut -d" " -f2 >actual &&
        test_cmp expect actual
diff --git a/t/test-lib.sh b/t/test-lib.sh
index beee1d847ff..8d25cb7c183 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -1166,3 +1166,4 @@ test_lazy_prereq LONG_IS_64BIT '
 '
 
 test_lazy_prereq TIME_IS_64BIT 'test-date is64bit'
+test_lazy_prereq TIME_T_IS_64BIT 'test-date time_t-is64bit'
-- 
2.12.2.windows.2.406.gd14a8f8640f