Be more careful when testing that repeated saves can produce the same tree.

[bup.git] / t / test-redundant-saves.sh

diff --git a/t/test-redundant-saves.sh b/t/test-redundant-saves.sh
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+++ b/t/test-redundant-saves.sh
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+#!/usr/bin/env bash
+
+# Test that running save more than once with no other changes produces
+# the exact same tree.
+
+# Note: we can't compare the top-level hash (i.e. the output of "save
+# -t" because that currently pulls the metadata for unindexed parent
+# directories directly from the filesystem, and the relevant atimes
+# may change between runs.  So instead we extract the roots of the
+# indexed trees for comparison via t/subtree-hash.
+
+. ./wvtest-bup.sh
+
+set -eo pipefail
+
+WVSTART 'all'
+
+top="$(pwd)"
+tmpdir="$(wvmktempdir)"
+export BUP_DIR="$tmpdir/bup"
+export GIT_DIR="$BUP_DIR"
+
+bup() { "$top/bup" "$@"; }
+
+mkdir -p "$tmpdir/src"
+mkdir -p "$tmpdir/src/d"
+mkdir -p "$tmpdir/src/d/e"
+touch "$tmpdir/src/"{f,b,a,d}
+touch "$tmpdir/src/d/z"
+
+WVPASS bup init
+WVPASS bup index -u "$tmpdir/src"
+
+declare -a indexed_top
+IFS=/
+indexed_top="${tmpdir##/}"
+indexed_top=(${indexed_top%%/})
+unset IFS
+
+tree1=$(bup save -t "$tmpdir/src") || WVFAIL
+indexed_tree1="$(t/subtree-hash "$tree1" "${indexed_top[@]}" src)"
+
+WVPASSEQ "$(cd "$tmpdir/src" && bup index -m)" ""
+
+tree2=$(bup save -t "$tmpdir/src") || WVFAIL
+indexed_tree2="$(t/subtree-hash "$tree2" "${indexed_top[@]}" src)"
+
+WVPASSEQ "$indexed_tree1" "$indexed_tree2"
+
+WVPASSEQ "$(bup index -s / | grep ^D)" ""
+
+tree3=$(bup save -t /) || WVFAIL
+indexed_tree3="$(t/subtree-hash "$tree3" "${indexed_top[@]}")"
+
+WVPASSEQ "$indexed_tree3" "$indexed_tree3"
+
+rm -rf "$tmpdir"