Add tests for cache_from functionality
ADD
tests/test_cache_from.py
+"""
+Test that --cache-from is passed in to docker API properly.
+"""
+import os
+import docker
+from unittest.mock import MagicMock, patch
+from tempfile import TemporaryDirectory
+
+def test_cache_from(monkeypatch):
+ FakeDockerClient = MagicMock()
+ cache_from = [
+ 'image-1:latest'
+ ]
+ fake_client = MagicMock(spec=docker.APIClient)
+ fake_client.build.return_value = iter([{'stream': 'fake'}])
+
+ with TemporaryDirectory() as d:
+ monkeypatch.chdir(d)
+ from repo2docker.buildpacks import BaseImage
+ for line in BaseImage().build(fake_client, 'image-2', '1Gi', {}, cache_from):
+ assert line == {'stream': 'fake'}
+ called_args, called_kwargs = fake_client.build.call_args
+ assert 'cache_from' in called_kwargs
+ assert called_kwargs['cache_from'] == cache_from
\ No newline at end of file

Add tests for cache_from functionality