def test_parent_image_fetching(git_repo, local_registry):
"""
Previous tags of images should be fetched before building new one
"""
image_name = f'{local_registry}/parent-image-fetching'
with cwd(git_repo):
# Create an image directory with a simple dockerfile
commit_file(git_repo, 'image/Dockerfile',
"""
FROM busybox
RUN echo 1 > /number
""")
first_image = config.LocalImage(image_name, 'image')
first_image.build()
# Image shouldn't exist in registry until we push it
assert not first_image.exists_in_registry()
first_image.push()
assert first_image.exists_in_registry()
client = docker.from_env()
# Remove it locally after pushing it, and make sure it is removed
# This lets us test if the pulling actually worked
client.images.remove(first_image.image_spec)
with pytest.raises(docker.errors.ImageNotFound):
client.images.get(first_image.image_spec)
# Update the image directory
commit_file(git_repo, 'image/Dockerfile',
"""
FROM busybox
RUN echo 2 > /number
""")
second_image = config.LocalImage(image_name, 'image')
# We must be able to tell that the first image tag is a possible parent of the second
assert first_image.tag in second_image.get_possible_parent_tags()
# Fetching the parents of the second image should bring the first docker image locally
second_image.fetch_parent_image()
assert client.images.get(first_image.image_spec)
def test_tag_generation(git_repo):
"""
Tag should be last commit of modified image dir
"""
commit_file(git_repo, 'image/Dockerfile', 'FROM busybox')
commit_file(git_repo, 'unrelated/file', 'unrelated')
with cwd(git_repo):
image = config.LocalImage('test-image', 'image')
assert image.tag == gitutils.last_modified_commit('image')
# Make sure tag isn't influenced by changes outside of iamge dir
assert image.tag != gitutils.last_modified_commit('unrelated')
# Change the Dockerfile and see that the tag changes
commit_file(git_repo, 'image/Dockerfile', 'FROM busybox:latest')
new_image = config.LocalImage('test-image', 'image')
assert new_image.tag == gitutils.last_modified_commit('image')
assert new_image.tag != image.tag
def test_build_image(git_repo, local_registry):
"""
Test building a small image, pushing it and testing it exists
"""
commit_file(git_repo, 'image/Dockerfile', 'FROM busybox')
with cwd(git_repo):
image = config.LocalImage(f'{local_registry}/test-build-image', 'image')
image.build()
assert not image.exists_in_registry()
image.push()
assert image.exists_in_registry()