test(ingest): add tests for index-append.py --remove

tests/index-remove.bats

@@ -0,0 +1,44 @@
+#!/usr/bin/env bats
+# tests/index-remove.bats — index-append.py --remove mode.
+setup() {
+  load 'helpers'
+  export GENOMES_ROOT="${BATS_TEST_TMPDIR}"
+  g_src="$(make_fixture_genome)"; export g="$g_src"
+}
+
+@test "index --remove: deletes the matching entry, keeps the others" {
+  cd "$g"
+  python3 "$SKILL_SCRIPTS/index-append.py" --section Sources --entry '- [[sources/a]] — A. `maturity: draft`'
+  python3 "$SKILL_SCRIPTS/index-append.py" --section Sources --entry '- [[sources/b]] — B. `maturity: draft`'
+  grep -q 'sources/a' wiki/index.md
+  grep -q 'sources/b' wiki/index.md
+
+  run python3 "$SKILL_SCRIPTS/index-append.py" --remove 'sources/a'
+  [ "$status" -eq 0 ]
+  ! grep -q '\[\[sources/a\]\]' wiki/index.md
+  grep -q 'sources/b' wiki/index.md
+}
+
+@test "index --remove: idempotent when the entry is absent" {
+  cd "$g"
+  run python3 "$SKILL_SCRIPTS/index-append.py" --remove 'sources/does-not-exist'
+  [ "$status" -eq 0 ]
+  [[ "$output" == *'nothing to remove'* ]]
+}
+
+@test "index --remove: bumps last_updated" {
+  cd "$g"
+  python3 "$SKILL_SCRIPTS/index-append.py" --section Sources --entry '- [[sources/a]] — A. `maturity: draft`'
+  # set last_updated to an old date, then remove and check it moved
+  sed -i 's/^last_updated:.*/last_updated: 2000-01-01/' wiki/index.md
+  run python3 "$SKILL_SCRIPTS/index-append.py" --remove 'sources/a'
+  [ "$status" -eq 0 ]
+  ! grep -q '2000-01-01' wiki/index.md
+  grep -q "last_updated: $(date +%F)" wiki/index.md
+}
+
+@test "index --remove: rejects passing both --entry and --remove" {
+  cd "$g"
+  run python3 "$SKILL_SCRIPTS/index-append.py" --section Sources --entry '- [[sources/a]] — x' --remove 'sources/a'
+  [ "$status" -eq 2 ]
+}