def test_receive_normal(self):
"""
Test the receive function under normal operation by simulating normal
communication between two clients and a server
"""
s = DSServer("i like to eet fud.", diff=diff, patch=patch)
c1 = s.connection()
c2 = s.connection()
diff1 = diff("i like to eet fud.", "i like to eat fud.")
data1 = {
"id": 1,
"version": [0, 0],
"edits": [{"version": [0, 0], "diff": diff1}],
}
result1 = s.receive(data1)
# the server sends a response saying "I received version one"
expected1 = {"diff": "", "version": [1, 0], "rollback": False}
diff2 = diff("i like to eet fud.", "i like to eet food.")
data2 = {
"id": 2,
"version": [0, 0],
"edits": [{"version": [0, 0], "diff": diff2}],
}
result2 = s.receive(data2)
# the server sends a response saying
# "I received version one, but you must use the diff to get up to date with the latest changes"
expected2 = {
"diff": "@@ -4,16 +4,16 @@\n ike to e\n-e\n+a\n t food.\n",
"version": [1, 0],
"rollback": False,
}
diff3 = diff("i like to eat fud.", "I like to eat fud.")
data3 = {
"id": 1,
"version": [1, 1],
"edits": [{"version": [1, 1], "diff": diff3}],
}
result3 = s.receive(data3)
expected3 = {
"diff": "@@ -12,7 +12,8 @@\n at f\n-u\n+oo\n d.\n",
"version": [2, 1],
"rollback": False,
}
assert expected1 == result1 and expected2 == result2 and expected3 == result3
def test_receive_server_send_issue(self):
"""
Test the receive function under the circumstances that the server's data
was never received by the client
"""
s = DSServer("i like to eet fud.", diff=diff, patch=patch)
c1 = s.connection()
# the client sends a successful response to the server. However, the
# client never recieves a response. The slient sends another request
# with both edits (since they are stored in the edit stack). The
# server notices that the server version sent from the client is behind,
# so performs a rollback. Everything then goes back to normal
diff1 = diff("i like to eet fud.", "i like to eat fud.")
diff2 = diff("i like to eat fud.", "I like to eat fud.")
data = {
"id": 1,
"version": [1, 0],
"edits": [
{"version": [0, 0], "diff": diff1},
{"version": [1, 0], "diff": diff2},
],
}
result = s.receive(data)
expected = {"diff": "", "version": [2, 0], "rollback": True}
assert result == expected
def test_receive_client_send_issue(self):
"""
Test the receive function under the circumstances that the client's data
was never received by the server
"""
s = DSServer("i like to eet fud.", diff=diff, patch=patch)
c1 = s.connection()
# as the connection keeps timing out, the edit stack becomes bigger,
# eventually becoming "data". There are 2 attempts before the server
# finally receives the information
diff1 = diff("i like to eet fud.", "i like to eat fud.")
diff2 = diff("i like to eat fud.", "I like to eat fud.")
diff3 = diff("I like to eat fud.", "I like to eat food.")
data = {
"id": 1,
"version": [2, 0],
"edits": [
{"version": [0, 0], "diff": diff1},
{"version": [1, 0], "diff": diff2},
{"version": [2, 0], "diff": diff3},
],
}
result = s.receive(data)
expected = {"diff": "", "version": [3, 0], "rollback": True}
assert result == expected