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https://github.com/bazel-contrib/bazel-lib
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a9dc052c8b
It's a simple way to make an executable example demonstrate what outputs a rule produces. See https://github.com/aspect-build/rules_ts/pull/214 for an example usage in the real world.
73 lines
2.1 KiB
Python
73 lines
2.1 KiB
Python
"Helpers for making test assertions"
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load("//lib:params_file.bzl", "params_file")
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load("@bazel_skylib//lib:types.bzl", "types")
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load("@bazel_skylib//rules:diff_test.bzl", "diff_test")
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load("@bazel_skylib//rules:write_file.bzl", "write_file")
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load("//lib:utils.bzl", "default_timeout")
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def assert_contains(name, actual, expected, size = None, timeout = None):
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"""Generates a test target which fails if the file doesn't contain the string.
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Depends on bash, as it creates an sh_test target.
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Args:
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name: target to create
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actual: Label of a file
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expected: a string which should appear in the file
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size: the size attribute of the test target
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timeout: the timeout attribute of the test target
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"""
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test_sh = "_{}_test.sh".format(name)
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write_file(
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name = "_" + name,
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out = test_sh,
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content = [
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"#!/usr/bin/env bash",
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"set -o errexit",
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"grep --fixed-strings '{}' $1".format(expected),
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],
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)
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native.sh_test(
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name = name,
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srcs = [test_sh],
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args = ["$(rootpath %s)" % actual],
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size = size,
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timeout = default_timeout(size, timeout),
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data = [actual],
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)
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def assert_outputs(name, actual, expected):
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"""Assert that the default outputs of a target are the expected ones.
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Args:
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name: name of the resulting diff_test
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actual: string of the label to check the outputs
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expected: a list of rootpaths of expected outputs, as they would appear in a runfiles manifest
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"""
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if not types.is_list(expected):
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fail("expected should be a list of strings")
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params_file(
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name = "_actual_" + name,
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data = [actual],
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args = ["$(rootpaths {})".format(actual)],
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out = "_{}_outputs.txt".format(name),
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)
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write_file(
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name = "_expected_ " + name,
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content = expected,
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out = "_expected_{}.txt".format(name),
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)
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diff_test(
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name = name,
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file1 = "_expected_ " + name,
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file2 = "_actual_" + name,
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)
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