Add --compat-date flag and @all-compat-flags variant to wd_test#5773
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Add --compat-date flag and @all-compat-flags variant to wd_test#5773
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harrishancock
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Dec 29, 2025
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Add a --compat-date CLI flag to `workerd test` that overrides the compatibility date for all workers. When this flag is used, workers must NOT specify compatibilityDate in the config - this allows the test harness to control the compat date externally. The wd_test macro now generates three variants: - name@ (default): oldest compat date (2000-01-01) - name@all-compat-flags: newest compat date (2999-12-31) - name@all-autogates: all autogates + oldest compat date Tests can selectively disable variants using generate_default_variant, generate_all_compat_flags_variant, and generate_all_autogates_variant flags. Also adds test cases to verify the compat-flag variants work correctly by checking Cloudflare.compatibilityFlags.formdata_parser_supports_files is enabled/disabled based on the compat date.
First we bulk remove compat date from all tests. Then we add enable-flags to make the default variant pass. Then we add disable-flags to make the all-compat-flags variant pass. Python tests don't run all-compat-flags and all-autogates variants. I made them all pass under those variants and then disabled the variants. The impact on CI times is just way too high to justify the value sadly. We need to find a way to improve python test CI times and then reenable them.
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Add a --compat-date CLI flag to
workerd testthat overrides thecompatibility date for all workers. When this flag is used, workers
must NOT specify compatibilityDate in the config - this allows the
test harness to control the compat date externally.
The wd_test macro now generates three variants:
Tests can selectively disable variants using generate_default_variant,
generate_all_compat_flags_variant, and generate_all_autogates_variant
flags.
Also adds test cases to verify the compat-flag variants work correctly
by checking Cloudflare.compatibilityFlags.formdata_parser_supports_files
is enabled/disabled based on the compat date.
First we bulk remove compat date from all tests.
Then we add enable-flags to make the default variant pass.
Then we add disable-flags to make the all-compat-flags variant pass.
Python tests don't run all-compat-flags and all-autogates variants.
I made them all pass under those variants and then disabled the variants.
The impact on CI times is just way too high to justify the value sadly.
We need to find a way to improve python test CI times and then reenable them.