Add regression tests

extras/test/40_regression.sh

@@ -0,0 +1,36 @@
+#!/usr/bin/env zsh
+
+export test_description="Tomb regression tests"
+
+source ./setup
+
+TOMB_VERSION=("2.3")
+for version in "${TOMB_VERSION[@]}"; do
+    URL="https://files.dyne.org/tomb/old-releases/Tomb-$version.tar.gz"
+
+    curl "$URL" > "$TMP/tomb-regression.tar.gz"
+    mkdir -p "$TMP/tomb-regression"
+    tar xfz "$TMP/tomb-regression.tar.gz" \
+        --strip-components 1 -C "$TMP/tomb-regression"
+    T="$TMP/tomb-regression/tomb"
+    [[ "$version" == "$(${T} -v |& awk 'NR==1 {print $3}')" ]] || continue
+
+    test_export "regression_$version"
+    test_expect_success "Regression tests: opening old tomb ($version) with Tomb" "
+        tt_dig -s 20 &&
+        tt_forge --tomb-pwd $DUMMYPASS &&
+        tt_lock --tomb-pwd $DUMMYPASS &&
+        T='$TOMB_BIN' &&
+        tt_open --tomb-pwd $DUMMYPASS &&
+        tt_close
+        "
+
+    test_export "test" # Using already generated tomb
+    test_expect_success "Regression tests: opening new tomb with Tomb $version" "
+        export T='$TMP/tomb-regression/tomb' &&
+        tt_open --tomb-pwd $DUMMYPASS &&
+        tt_close
+        "
+done
+
+test_done