Initial import

smoke.sh

@@ -0,0 +1,101 @@
+#!/bin/sh
+set -eu
+
+tool=${1:-zig-out/bin/pick}
+tmp=${TMPDIR:-.zig-cache}/pick-smoke.$$
+mkdir -p "$tmp"
+trap 'rm -rf "$tmp"' EXIT HUP INT TERM
+
+# req: pick/008
+# req: pick/009
+# req: pick/010
+
+assert_eq() {
+  want=$1
+  got=$2
+  cmp "$want" "$got"
+}
+
+assert_empty() {
+  file=$1
+  if [ -s "$file" ]; then
+    echo "pick: expected empty file: $file" >&2
+    exit 1
+  fi
+}
+
+assert_fails() {
+  if "$@"; then
+    echo "pick: command unexpectedly succeeded: $*" >&2
+    exit 1
+  fi
+}
+
+# Numeric field selection preserves records and stdout contains only selected TSV.
+printf 'a\tb\tc\n1\t2\t3\n' | "$tool" 2 > "$tmp/pick-one.out"
+printf 'b\n2\n' > "$tmp/pick-one.want"
+assert_eq "$tmp/pick-one.want" "$tmp/pick-one.out"
+
+# Header selection emits the selected header and selected data columns.
+printf 'path\tsize\tkind\na\t10\tfile\n' | "$tool" --header path size > "$tmp/pick-header.out"
+printf 'path\tsize\na\t10\n' > "$tmp/pick-header.want"
+assert_eq "$tmp/pick-header.want" "$tmp/pick-header.out"
+
+# Missing fields are empty fields, not pipeline failures.
+printf 'a\tb\n1\n' | "$tool" 1 2 > "$tmp/pick-missing.out"
+printf 'a\tb\n1\t\n' > "$tmp/pick-missing.want"
+assert_eq "$tmp/pick-missing.want" "$tmp/pick-missing.out"
+
+# CRLF input is accepted and normalized to LF records.
+printf 'a\tb\r\n1\t2\r\n' | "$tool" 2 > "$tmp/pick-crlf.out"
+printf 'b\n2\n' > "$tmp/pick-crlf.want"
+assert_eq "$tmp/pick-crlf.want" "$tmp/pick-crlf.out"
+
+# A record longer than the internal read buffer still streams correctly across
+# chunk boundaries without whole-input buffering.
+: > "$tmp/pick-long.in"
+i=0
+while [ "$i" -lt 9000 ]; do
+  printf x >> "$tmp/pick-long.in"
+  i=$((i + 1))
+done
+printf '\tb\n' >> "$tmp/pick-long.in"
+"$tool" 2 < "$tmp/pick-long.in" > "$tmp/pick-long.out"
+printf 'b\n' > "$tmp/pick-long.want"
+assert_eq "$tmp/pick-long.want" "$tmp/pick-long.out"
+
+# Help is stdout-only and successful.
+"$tool" --help > "$tmp/pick-help.out" 2> "$tmp/pick-help.err"
+grep -q '^usage: pick' "$tmp/pick-help.out"
+assert_empty "$tmp/pick-help.err"
+
+# Usage errors are stderr-only and nonzero.
+assert_fails "$tool" > "$tmp/pick-noargs.out" 2> "$tmp/pick-noargs.err"
+assert_empty "$tmp/pick-noargs.out"
+grep -q '^usage: pick' "$tmp/pick-noargs.err"
+
+assert_fails "$tool" 0 > "$tmp/pick-zero.out" 2> "$tmp/pick-zero.err"
+assert_empty "$tmp/pick-zero.out"
+grep -q 'fields are 1-based' "$tmp/pick-zero.err"
+
+assert_fails "$tool" nope > "$tmp/pick-invalid.out" 2> "$tmp/pick-invalid.err"
+assert_empty "$tmp/pick-invalid.out"
+grep -q 'invalid field' "$tmp/pick-invalid.err"
+
+# Forbidden near miss: option-looking regex/expression input is rejected as data,
+# not interpreted as another command language.
+assert_fails "$tool" --regex '.*' > "$tmp/pick-regex.out" 2> "$tmp/pick-regex.err"
+assert_empty "$tmp/pick-regex.out"
+grep -q 'invalid field' "$tmp/pick-regex.err"
+
+# Head-style consumers may close stdout early; that must not pollute stderr.
+i=0
+{
+  while [ "$i" -lt 20000 ]; do
+    printf 'a\tb\n'
+    i=$((i + 1))
+  done
+} | "$tool" 1 2> "$tmp/pick-head.err" | sed 1q > "$tmp/pick-head.out"
+printf 'a\n' > "$tmp/pick-head.want"
+assert_eq "$tmp/pick-head.want" "$tmp/pick-head.out"
+assert_empty "$tmp/pick-head.err"