Created
June 29, 2024 00:48
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a BUILD.bazel that builds a container that runs jest tests (https://anthonyoleinik.com/blog_directory/bazel-jest-container/)
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load("@aspect_rules_ts//ts:defs.bzl", "ts_project") | |
load("@integration_npm//:defs.bzl", "npm_link_all_packages", "npm_link_targets") | |
load("@aspect_rules_js//js:defs.bzl", "js_binary", "js_image_layer") | |
load("@rules_oci//oci:defs.bzl", "oci_image") | |
load("@aspect_rules_jest//jest:defs.bzl", "jest_test") | |
load("@aspect_bazel_lib//lib:copy_file.bzl", "copy_file") | |
# The jest configuration file for the docker image to pick up. | |
copy_file( | |
name = "runtime_config", | |
src = select({ | |
"//bazel:local_registry": "configs/jest.local.config.js", | |
"//bazel:staging_registry": "configs/jest.staging.config.js", | |
# default to the local registry. | |
"//conditions:default": "configs/jest.local.config.js", | |
}), | |
out = "jest.config.js", | |
) | |
npm_link_all_packages(name = "node_modules") | |
ts_project( | |
name = "integration_test_js", | |
srcs = glob(["src/**/*.ts"]) + [ | |
"decs.d.ts" | |
], | |
deps = [":node_modules"], | |
) | |
# so you can run locally against a minikube. | |
jest_test( | |
name = "tests", | |
config = "configs/jest.local.config.js", | |
data = [ | |
":integration_test_js", | |
], | |
node_modules = ":node_modules", | |
) | |
# bazel run this will NOT work; bazel does not | |
# understand how to decypher the symlinks here. | |
js_binary( | |
name = "test_binary", | |
chdir = package_name(), | |
data = [ | |
":integration_test_js", | |
":runtime_config", | |
"//integration_tests:node_modules", | |
"driver.js" | |
], | |
# make this private so no one thinks this is a runnable target; | |
# it will not work outside of the container. | |
visibility = ["//visibility:private"], | |
entry_point = "driver.js" | |
) | |
js_image_layer( | |
name = "test_layer", | |
binary = ":test_binary", | |
root = "/tests" | |
) | |
CMD = "/tests/integration_tests/test_binary" | |
oci_image( | |
name = "integration_test_image", | |
base = "@ubuntu_linux_amd64", | |
cmd = [CMD], | |
entrypoint = ["bash"], | |
tars = [ | |
":test_layer", | |
], | |
visibility = ["//visibility:public"], | |
workdir = select({ | |
"@aspect_bazel_lib//lib:bzlmod": CMD + ".runfiles/_main", | |
"//conditions:default": CMD + ".runfiles/__main__", | |
}), | |
) |
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