def test_disallow_set_page_config_twice(self):
"""st.set_page_config cannot be called twice"""
fake_enqueue = lambda msg: None
ctx = ReportContext(
"TestSessionID",
fake_enqueue,
"",
SessionState(),
UploadedFileManager(),
)
ctx.on_script_start()
msg = ForwardMsg()
msg.page_config_changed.title = "foo"
ctx.enqueue(msg)
with self.assertRaises(StreamlitAPIException):
same_msg = ForwardMsg()
same_msg.page_config_changed.title = "bar"
ctx.enqueue(same_msg)
def test_set_page_config_reset(self):
"""st.set_page_config should be allowed after a rerun"""
fake_enqueue = lambda msg: None
ctx = ReportContext(
"TestSessionID",
fake_enqueue,
"",
SessionState(),
UploadedFileManager(),
)
ctx.on_script_start()
msg = ForwardMsg()
msg.page_config_changed.title = "foo"
ctx.enqueue(msg)
ctx.reset()
try:
ctx.on_script_start()
ctx.enqueue(msg)
except StreamlitAPIException:
self.fail("set_page_config should have succeeded after reset!")
def test_set_page_config_first(self):
"""st.set_page_config must be called before other st commands
when the script has been marked as started"""
fake_enqueue = lambda msg: None
ctx = ReportContext(
"TestSessionID",
fake_enqueue,
"",
SessionState(),
UploadedFileManager(),
)
ctx.on_script_start()
markdown_msg = ForwardMsg()
markdown_msg.delta.new_element.markdown.body = "foo"
msg = ForwardMsg()
msg.page_config_changed.title = "foo"
ctx.enqueue(markdown_msg)
with self.assertRaises(StreamlitAPIException):
ctx.enqueue(msg)
