69 lines
2.0 KiB
Python
69 lines
2.0 KiB
Python
import os
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from unittest import mock
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from pytorch_lightning.plugins.environments import LightningEnvironment
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@mock.patch.dict(os.environ, {})
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def test_default_attributes():
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""" Test the default attributes when no environment variables are set. """
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env = LightningEnvironment()
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assert not env.creates_children()
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assert env.master_address() == "127.0.0.1"
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assert isinstance(env.master_port(), int)
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assert env.world_size() == 1
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assert env.local_rank() == 0
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assert env.node_rank() == 0
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@mock.patch.dict(os.environ, {
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"MASTER_ADDR": "1.2.3.4",
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"MASTER_PORT": "500",
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"LOCAL_RANK": "2",
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"NODE_RANK": "3",
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})
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def test_attributes_from_environment_variables():
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""" Test that the default cluster environment takes the attributes from the environment variables. """
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env = LightningEnvironment()
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assert env.master_address() == "1.2.3.4"
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assert env.master_port() == 500
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assert env.world_size() == 1
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assert env.global_rank() == 0
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assert env.local_rank() == 2
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assert env.node_rank() == 3
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env.set_global_rank(100)
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assert env.global_rank() == 100
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env.set_world_size(100)
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assert env.world_size() == 100
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@mock.patch.dict(os.environ, {
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"GROUP_RANK": "1",
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})
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def test_node_rank_from_group_rank():
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""" Test that the GROUP_RANK substitutes NODE_RANK. """
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env = LightningEnvironment()
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assert "NODE_RANK" not in os.environ
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assert env.node_rank() == 1
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@mock.patch.dict(os.environ, {})
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def test_random_master_port():
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""" Test randomly chosen master port when no master port was given by user. """
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env = LightningEnvironment()
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port = env.master_port()
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assert isinstance(port, int)
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# repeated calls do not generate a new port number
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assert env.master_port() == port
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@mock.patch.dict(os.environ, {
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"WORLD_SIZE": "1",
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})
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def test_teardown():
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""" Test that the GROUP_RANK substitutes NODE_RANK. """
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env = LightningEnvironment()
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assert "WORLD_SIZE" in os.environ
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env.teardown()
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assert "WORLD_SIZE" not in os.environ
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