name = "log_parser"
category = "b"
description = """
Read log lines from stdin. Each line has the format: "LEVEL: message"
where LEVEL is one of ERROR, WARN, INFO.
Count occurrences of each level and print a summary sorted by level name.
Format: "LEVEL: count"
"""

bash_source = """
#!/bin/bash
while IFS= read -r line || [[ -n "$line" ]]; do
    echo "${line%%:*}"
done | sort | uniq -c | while read -r count level; do
    echo "$level: $count"
done
"""

[[test_cases]]
stdin = """ERROR: disk full
INFO: started
WARN: low memory
ERROR: timeout
INFO: completed"""
expected_stdout = """ERROR: 2
INFO: 2
WARN: 1"""

[[test_cases]]
stdin = """INFO: boot
INFO: ready
INFO: shutdown"""
expected_stdout = "INFO: 3"