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import flask
def test_template_rendered(app, client):
@app.route("/")
def index():
return flask.render_template("simple_template.html", whiskey=42)
recorded = []
def record(sender, template, context):
recorded.append((template, context))
flask.template_rendered.connect(record, app)
try:
client.get("/")
assert len(recorded) == 1
template, context = recorded[0]
assert template.name == "simple_template.html"
assert context["whiskey"] == 42
finally:
flask.template_rendered.disconnect(record, app)
def test_before_render_template():
app = flask.Flask(__name__)
@app.route("/")
def index():
return flask.render_template("simple_template.html", whiskey=42)
recorded = []
def record(sender, template, context):
context["whiskey"] = 43
recorded.append((template, context))
flask.before_render_template.connect(record, app)
try:
rv = app.test_client().get("/")
assert len(recorded) == 1
template, context = recorded[0]
assert template.name == "simple_template.html"
assert context["whiskey"] == 43
assert rv.data == b"<h1>43</h1>"
finally:
flask.before_render_template.disconnect(record, app)
def test_request_signals():
app = flask.Flask(__name__)
calls = []
def before_request_signal(sender):
calls.append("before-signal")
def after_request_signal(sender, response):
assert response.data == b"stuff"
calls.append("after-signal")
@app.before_request
def before_request_handler():
calls.append("before-handler")
@app.after_request
def after_request_handler(response):
calls.append("after-handler")
response.data = "stuff"
return response
@app.route("/")
def index():
calls.append("handler")
return "ignored anyway"
flask.request_started.connect(before_request_signal, app)
flask.request_finished.connect(after_request_signal, app)
try:
rv = app.test_client().get("/")
assert rv.data == b"stuff"
assert calls == [
"before-signal",
"before-handler",
"handler",
"after-handler",
"after-signal",
]
finally:
flask.request_started.disconnect(before_request_signal, app)
flask.request_finished.disconnect(after_request_signal, app)
def test_request_exception_signal():
app = flask.Flask(__name__)
recorded = []
@app.route("/")
def index():
raise ZeroDivisionError
def record(sender, exception):
recorded.append(exception)
flask.got_request_exception.connect(record, app)
try:
assert app.test_client().get("/").status_code == 500
assert len(recorded) == 1
assert isinstance(recorded[0], ZeroDivisionError)
finally:
flask.got_request_exception.disconnect(record, app)
def test_appcontext_signals(app, client):
recorded = []
def record_push(sender, **kwargs):
recorded.append("push")
def record_pop(sender, **kwargs):
recorded.append("pop")
@app.route("/")
def index():
return "Hello"
flask.appcontext_pushed.connect(record_push, app)
flask.appcontext_popped.connect(record_pop, app)
try:
rv = client.get("/")
assert rv.data == b"Hello"
assert recorded == ["push", "pop"]
finally:
flask.appcontext_pushed.disconnect(record_push, app)
flask.appcontext_popped.disconnect(record_pop, app)
def test_flash_signal(app):
@app.route("/")
def index():
flask.flash("This is a flash message", category="notice")
return flask.redirect("/other")
recorded = []
def record(sender, message, category):
recorded.append((message, category))
flask.message_flashed.connect(record, app)
try:
client = app.test_client()
with client.session_transaction():
client.get("/")
assert len(recorded) == 1
message, category = recorded[0]
assert message == "This is a flash message"
assert category == "notice"
finally:
flask.message_flashed.disconnect(record, app)
def test_appcontext_tearing_down_signal(app, client):
app.testing = False
recorded = []
def record_teardown(sender, exc):
recorded.append(exc)
@app.route("/")
def index():
raise ZeroDivisionError
flask.appcontext_tearing_down.connect(record_teardown, app)
try:
rv = client.get("/")
assert rv.status_code == 500
assert len(recorded) == 1
assert isinstance(recorded[0], ZeroDivisionError)
finally:
flask.appcontext_tearing_down.disconnect(record_teardown, app)
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