Add more verbose output and apply fixes suggested by shellcheck.

tests/Modifiers_-_--interval.sh

@@ -2,11 +2,20 @@
 #
 # Check that the update interval can be set.
 
+# Dummy assignments for "shellcheck".
+testSubject="${testSubject:-false}"; workFile1="${workFile1:-.tmp1}"
+
 sleep 1 | "${testSubject}" -f -i 0.1 >/dev/null 2>"${workFile1}"
 
 # There should be more than 6 lines of output.
 #
-NUM=$(tr '\r' '\n' < "${workFile1}" | wc -l | tr -d ' ')
-test $NUM -gt 6
+lineCount=$(tr '\r' '\n' < "${workFile1}" | wc -l | tr -dc '0-9')
+if ! test "${lineCount}" -gt 6; then
+	echo "fewer than 7 lines of output"
+	tr '\r' '\n' < "${workFile1}"
+	exit 1
+fi
+
+exit 0
 
 # EOF

tests/Transfer_-_--rate-limit.sh

@@ -2,12 +2,20 @@
 #
 # A simple test of rate limiting.
 
+# Dummy assignments for "shellcheck".
+testSubject="${testSubject:-false}"
+
 # Transfer 102 bytes at 100 bytes/sec. It should take at least 1 second.
 #
-START=$(date +%S)
+startTime=$(date +%S)
 dd if=/dev/zero bs=102 count=1 2>/dev/null | "${testSubject}" -L 100 2>/dev/null | cat >/dev/null
-END=$(date +%S)
+endTime=$(date +%S)
 
-test $START -ne $END
+if test "${startTime}" = "${endTime}"; then
+	echo "transfer took zero seconds"
+	exit 1
+fi
+
+exit 0
 
 # EOF

tests/Transfer_-_--remote.sh

@@ -2,28 +2,35 @@
 #
 # Try changing the format of a transfer remotely.
 
+# Dummy assignments for "shellcheck".
+testSubject="${testSubject:-false}"; workFile1="${workFile1:-.tmp1}"; workFile2="${workFile2:-.tmp2}"; workFile3="${workFile3:-.tmp3}"; workFile4="${workFile4:-.tmp4}"
+
 # Do nothing if IPC is not supported.
 if ! "${testSubject}" -h 2>/dev/null | grep -Eq "^  -R,"; then
 	echo "IPC is not supported on this platform"
 	exit 2
 fi
 
-rm -f "${workFile1}" "${workFile2}" "${workFile3}" "${workFile4}" 2>/dev/null
-
 # Generate an empty test file.
 dd if=/dev/zero of="${workFile1}" bs=1024 count=10240 2>/dev/null
 
 (
 sleep 1
-"${testSubject}" -R $(cat "${workFile4}") -a
+"${testSubject}" -R "$(cat "${workFile4}")" -a
 sleep 2
-"${testSubject}" -R $(cat "${workFile4}") -L 10M
+"${testSubject}" -R "$(cat "${workFile4}")" -L 10M
 ) &
 
 "${testSubject}" -L 2M -f -P "${workFile4}" "${workFile1}" > "${workFile2}" 2>"${workFile3}"
 
 # Make sure there is more than one length of line (excluding blank lines).
-line_lengths=$(tr '\r' '\n' < "${workFile3}" | awk '{print length($0)}' | grep -Fvx 0 | sort -n | uniq | wc -l)
-test "${line_lengths}" -gt 1
+line_lengths=$(tr '\r' '\n' < "${workFile3}" | awk '{print length($0)}' | grep -Fvx 0 | sort -n | uniq | wc -l | tr -dc '0-9')
+
+if ! test "${line_lengths}" -gt 1; then
+	echo "only one line length seen - format change failed"
+	exit 1
+fi
+
+exit 0
 
 # EOF

tests/Transfer_-_--stop-at-size.sh

@@ -2,8 +2,8 @@
 #
 # Make sure -S stops at the given size.
 
-# exit on non-zero return codes
-set -e
+# Dummy assignments for "shellcheck".
+testSubject="${testSubject:-false}"; workFile1="${workFile1:-.tmp1}"; workFile2="${workFile2:-.tmp2}"
 
 # generate some data
 dd if=/dev/urandom of="${workFile1}" bs=1024 count=10 2>/dev/null
@@ -17,6 +17,11 @@ outputChecksum=$(cksum "${workFile2}" | awk '{print $1}')
 dd if="${workFile1}" of="${workFile2}" bs=1024 count=5 2>/dev/null
 inputChecksum=$(cksum "${workFile2}" | awk '{print $1}')
 
-test "x${inputChecksum}" = "x${outputChecksum}"
+if ! test "${inputChecksum}" = "${outputChecksum}"; then
+	echo "input and output checksums differ"
+	exit 1
+fi
+
+exit 0
 
 # EOF