Added test

tests/Modifiers_-_--size.sh

@@ -0,0 +1,56 @@
+#!/bin/sh
+#
+# Check that "--size" affects the percentage shown.
+
+# Dummy assignments for "shellcheck".
+testSubject="${testSubject:-false}"; workFile1="${workFile1:-.tmp1}"
+
+# Process 100 bytes at 100 bytes per second, updating every 0.1 seconds for
+# around 10 output lines, but set the size to 200.
+#
+dd if=/dev/zero bs=100 count=1 2>/dev/null \
+| "${testSubject}" -s 200 -n -i 0.1 -L 100 >/dev/null 2>"${workFile1}"
+
+lineCount=$(wc -l < "${workFile1}" | tr -dc '0-9')
+finalLine=$(sed -n '$p' < "${workFile1}")
+
+# The number of output lines should be >8 and <13, and the final percentage
+# should be 50.
+#
+if ! test "${lineCount}" -gt 8; then
+	echo "part 1: fewer than 9 output lines (${lineCount})"
+	exit 1
+fi
+if ! test "${lineCount}" -lt 13; then
+	echo "part 1: more than 12 output lines (${lineCount})"
+	exit 1
+fi
+if ! test "${finalLine}" = "50"; then
+	echo "part 1: final percentage was not 50 (${finalLine})"
+	exit 1
+fi
+
+# Same as above, but this time with a size of 50 for 100 input bytes.
+#
+dd if=/dev/zero bs=100 count=1 2>/dev/null \
+| "${testSubject}" -s 50 -n -i 0.1 -L 100 >/dev/null 2>"${workFile1}"
+
+lineCount=$(wc -l < "${workFile1}" | tr -dc '0-9')
+finalLine=$(sed -n '$p' < "${workFile1}")
+
+if ! test "${lineCount}" -gt 8; then
+	echo "part 2: fewer than 9 output lines (${lineCount})"
+	exit 1
+fi
+if ! test "${lineCount}" -lt 13; then
+	echo "part 2: more than 12 output lines (${lineCount})"
+	exit 1
+fi
+if ! test "${finalLine}" = "200"; then
+	echo "part 2: final percentage was not 200 (${finalLine})"
+	exit 1
+fi
+
+exit 0
+
+# EOF