[PATCH] tests: fix intermittent failure in test/du/inodes.sh

[Pádraig Brady]

Prompted by the continuous integration build failure at:
http://hydra.nixos.org/build/5582213

* test/du/inodes.sh: Due to undefined order in returned directory
entries, the expected output might not match, so sort both expected
and actual output when returning --all directory entries.
Also use a simpler test for ensuring no errors are output.
---
 tests/du/inodes.sh |   44 ++++++++++++++++++++++++--------------------
 1 files changed, 24 insertions(+), 20 deletions(-)

diff --git a/tests/du/inodes.sh b/tests/du/inodes.sh
index 2069e2b..41186e4 100755
--- a/tests/du/inodes.sh
+++ b/tests/du/inodes.sh
@@ -25,7 +25,7 @@ printf '1\td\n' > exp || framework_failure_
 
 du --inodes d > out 2>err || fail=1
 compare exp out || { cat out; fail=1; }
-compare /dev/null err || fail=1
+test -s err && fail=1
 
 # Add a regular file: 2 inodes used.
 touch d/f || framework_failure_
@@ -33,62 +33,66 @@ printf '2\td\n' > exp || framework_failure_
 
 du --inodes d > out 2>err || fail=1
 compare exp out || { cat out; fail=1; }
-compare /dev/null err || fail=1
+test -s err && fail=1
 
 # Add a hardlink to the file: still only 2 inodes used.
 ln -v d/f d/h || framework_failure_
 du --inodes d > out 2>err || fail=1
 compare exp out || { cat out; fail=1; }
-compare /dev/null err || fail=1
+test -s err && fail=1
 
 # Now count also hardlinks (-l,--count-links): 3 inodes.
 printf '3\td\n' > exp || framework_failure_
 du --inodes -l d > out 2>err || fail=1
 compare exp out || { cat out; fail=1; }
-compare /dev/null err || fail=1
+test -s err && fail=1
 
 # Create a directory and summarize: 3 inodes.
 mkdir d/d || framework_failure_
 du --inodes -s d > out 2>err || fail=1
 compare exp out || { cat out; fail=1; }
-compare /dev/null err || fail=1
+test -s err && fail=1
 
 # Count inodes separated: 1-2.
 printf '1\td/d\n2\td\n' > exp || framework_failure_
 du --inodes -S d > out 2>err || fail=1
 compare exp out || { cat out; fail=1; }
-compare /dev/null err || fail=1
+test -s err && fail=1
 
 # Count inodes cumulative (default): 1-3.
 printf '1\td/d\n3\td\n' > exp || framework_failure_
 du --inodes d > out 2>err || fail=1
 compare exp out || { cat out; fail=1; }
-compare /dev/null err || fail=1
+test -s err && fail=1
 
 # Count all items: 1-1-3.
-printf '1\td/d\n1\td/h\n3\td\n' > exp || framework_failure_
-du --inodes -a d > out 2>err || fail=1
+# Sort output becaue the directory entry order is not defined.
+printf '1\td/d\n1\td/h\n3\td\n' | sort > exp || framework_failure_
+du --inodes -a d > out.tmp 2>err || fail=1
+sort <out.tmp >out || framework_failure_
 compare exp out || { cat out; fail=1; }
-compare /dev/null err || fail=1
+test -s err && fail=1
 
 # Count all items and hardlinks again: 1-1-1-4
-printf '1\td/d\n1\td/h\n1\td/f\n4\td\n' > exp || framework_failure_
-du --inodes -al d > out 2>err || fail=1
+# Sort output because the directory entry order is not defined.
+printf '1\td/d\n1\td/h\n1\td/f\n4\td\n' | sort > exp || framework_failure_
+du --inodes -al d > out.tmp 2>err || fail=1
+sort <out.tmp >out || framework_failure_
 compare exp out || { cat out; fail=1; }
-compare /dev/null err || fail=1
+test -s err && fail=1
 
 # Run with total (-c) line: 1-3-3
 printf '1\td/d\n3\td\n3\ttotal\n' > exp || framework_failure_
 du --inodes -c d > out 2>err || fail=1
 compare exp out || { cat out; fail=1; }
-compare /dev/null err || fail=1
+test -s err && fail=1
 
 # Create another file in the subdirectory: 2-4
 touch d/d/f || framework_failure_
 printf '2\td/d\n4\td\n' > exp || framework_failure_
 du --inodes d > out 2>err || fail=1
 compare exp out || { cat out; fail=1; }
-compare /dev/null err || fail=1
+test -s err && fail=1
 
 # Ensure human output (-h, --si) works.
 rm -rf d || framework_failure_
@@ -97,28 +101,28 @@ seq --format="d/file%g" 1023 | xargs touch || 
framework_failure_
 printf '1.0K\td\n' > exp || framework_failure_
 du --inodes -h d > out 2>err || fail=1
 compare exp out || { cat out; fail=1; }
-compare /dev/null err || fail=1
+test -s err && fail=1
 
 printf '1.1k\td\n' > exp || framework_failure_
 du --inodes --si d > out 2>err || fail=1
 compare exp out || { cat out; fail=1; }
-compare /dev/null err || fail=1
+test -s err && fail=1
 
 # Verify --inodes ignores -B.
 printf '1024\td\n' > exp || framework_failure_
 du --inodes -B10 d > out 2>err || fail=1
 compare exp out || { cat out; fail=1; }
-compare /dev/null err || fail=1
+test -s err && fail=1
 
 # Verify --inodes works with --threshold.
 printf '1024\td\n' > exp || framework_failure_
 du --inodes --threshold=1000 d > out 2>err || fail=1
 compare exp out || { cat out; fail=1; }
-compare /dev/null err || fail=1
+test -s err && fail=1
 
 du --inodes --threshold=-1000 d > out 2>err || fail=1
 compare /dev/null out || { cat out; fail=1; }
-compare /dev/null err || fail=1
+test -s err && fail=1
 
 # Verify --inodes raises a warning for --apparent-size and -b.
 du --inodes -b d > out 2>err || fail=1
-- 
1.7.7.6