Add script for running test in interactive emacs

This allows you to do a post-mortem, inspecting the backtrace
interactively and so forth.

test/run-test-interactive.sh

@@ -0,0 +1,31 @@
+#!/bin/bash
+
+if [ -z "$1" ]; then
+  echo "Usage: $0 testfile1 [testfile2 ...]"
+  exit 0
+fi
+
+set_default () {
+  eval "
+if [ -z \$$1 ]; then
+  $1=$2
+fi
+"
+}
+
+set_default EL_GET_LIB_DIR "$(dirname "$(dirname "$(readlink -f "$0")")")"
+set_default TMPDIR "$(dirname "$(mktemp --dry-run)")"
+set_default TEST_HOME "$TMPDIR/el-get-test-home"
+set_default EMACS "$(which emacs)"
+
+run_test () {
+  testfile="$1"
+  echo "*** Running el-get test $testfile interactively ***"
+  mkdir -p "$TEST_HOME"/.emacs.d
+  rm -rf "$TEST_HOME"/.emacs.d/el-get/
+  HOME="$TEST_HOME" "$EMACS" -Q -L "$EL_GET_LIB_DIR" -l "$testfile"
+}
+
+for t in "$@"; do
+  run_test "$t"
+done