Simple way to test jinja templates. Depends on Flask (and by extension, Jinja2). Copy shell script to the directory where you have the templates you want to test run then execute script and visit localhost:5000/<template_name>

jinja_test.sh

#!/bin/bash
/bin/chmod 0755 $0
if [ ! -f "jinja_test.py" ]; then
    cat <<EOF > jinja_test.py
import os
from flask import Flask, abort, render_template
from jinja2 import FileSystemLoader

app = Flask(__name__)
app.jinja_loader = FileSystemLoader(
    os.path.dirname(os.path.abspath(__file__)))

@app.route("/<tpl>")
def test_template(tpl=None):
    if os.path.exists(tpl):
        return render_template(tpl)
    else:
        abort(404)

app.run(debug=True)
EOF
fi

# source ~/bsedev/bin/activate  # Uncomment/change if using virtualenv
/usr/bin/env python jinja_test.py
/bin/rm jinja_test.py