Merge lp:~daniel-nichter/percona-toolkit/bash-tool-libs r129.

t/lib/bash/safeguards.sh

@@ -0,0 +1,50 @@
+#!/usr/bin/env bash
+
+TESTS=10
+
+source "$LIB_DIR/log_warn_die.sh"
+source "$LIB_DIR/safeguards.sh"
+
+TMPDIR="$TEST_TMPDIR"
+SAMPLE="$T_LIB_DIR/samples/bash"
+
+disk_space "/" > $TMPDIR/df-out
+cmd_ok \
+   "grep -q Avail $TMPDIR/df-out" \
+   "disk_space()"
+
+check_disk_space "$SAMPLE/diskspace001.txt" 22495 18 >$TMPDIR/out 2>&1
+is "$?" "0" "Enough disk space"
+is \
+   "`cat $TMPDIR/out`" \
+   "" \
+   "No output if enough disk space"
+
+check_disk_space "$SAMPLE/diskspace001.txt" 22496 18 >$TMPDIR/out 2>&1
+is "$?" "1" "Not enough MB free"
+cmd_ok \
+   "grep -q '19% free, 22496 MB free; wanted more than 18% free or 22496 MB free' $TMPDIR/out" \
+   "Warning if not enough disk space"
+
+check_disk_space "$SAMPLE/diskspace001.txt" 22495 19 >$TMPDIR/out 2>&1
+is "$?" "1" "Not enough % free"
+
+# ###########################################################################
+# Check with a margin (amount we plan to use in the future).
+# ###########################################################################
+
+check_disk_space "$SAMPLE/diskspace001.txt" 22395 18 100
+is "$?" "0" "Enough disk space with margin"
+
+check_disk_space "$SAMPLE/diskspace001.txt" 22396 18 100 >$TMPDIR/out 2>&1
+is "$?" "1" "Not enough MB free with margin"
+
+check_disk_space "$SAMPLE/diskspace001.txt" 100 5 20000 >$TMPDIR/out 2>&1
+is "$?" "1" "Not enough % free with margin"
+cmd_ok \
+   "grep -q '3% free,' $TMPDIR/out" \
+   "Calculates % free with margin"
+
+# ###########################################################################
+# Done
+# ###########################################################################

t/lib/samples/bash/diskspace001.txt

@@ -0,0 +1,2 @@
+Filesystem   1M-blocks  Used Available Capacity  Mounted on
+/dev/disk0s2    115383 92637     22496    81%    /