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pv/tests/Display_-_--progress_-_increasing.test

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#!/bin/sh
#
# Check that the progress bar increases in size when data is coming in.
# Allow all tests to be skipped, e.g. during a release build
test "${SKIP_ALL_TESTS}" = "1" && exit 77
true "${testSubject:?not set - call this from 'make check'}"
true "${workFile1:?not set - call this from 'make check'}"
dd if=/dev/zero bs=100 count=1 2>/dev/null \
| "${testSubject}" -f -p -i 0.1 -L 50 -s 100 >/dev/null 2>"${workFile1}"
# There should be more than 5 different lines of output.
#
lineCount=$(tr '\r' '\n' < "${workFile1}" | sort | uniq -u | wc -l | tr -dc '0-9')
if ! test "${lineCount}" -gt 5; then
echo "fewer than 6 different progress lines (${lineCount})"
tr '\r' '\n' < "${workFile1}" | sort | uniq -u
exit 1
fi
# Counting the "=" characters in each line that make up the progress bar
# should give at least 5 different line lengths.
#
differentBarLengthsCount=$(tr '\r' '\n' < "${workFile1}" | tr -dc '=\n' | awk '{print length($1)}' | sort | uniq -u | wc -l | tr -dc '0-9')
if ! test "${differentBarLengthsCount}" -gt 5; then
echo "fewer than 6 different progress bar lengths detected (${differentBarLengthsCount})"
tr '\r' '\n' < "${workFile1}" | sort | uniq -u
exit 1
fi
exit 0