Fix mdbook test
#741
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Fix mdbook test
#741
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The test for `mdbook test` fails due to the index preprocessor which only runs on README files.
Ruin0x11
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Aug 30, 2020
Fix `mdbook test`
ehuss
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Dec 10, 2025
This fixes a problem where custom preprocessors were not being registered when running tests. This was caused by the test function rebuilding the preprocessor map. This removes the code that was rebuilding the preprocessors and removing the IndexPreprocessor when running tests. Skipping IndexPreprocessor was added back in rust-lang#741 to fix rust-lang#724 which was caused by rust-lang#685 which added the IndexPreprocessor. Additionally, rust-lang#1986 added running *all* preprocessors. The IndexPreprocessor was removed because in the past the code was testing against the source directly, and the path from `chapter.path` is the converted `index.md` file, and that filename does not exist in the source. This isn't a problem anymore because due to rust-lang#891 it is not reading from the `src` directory. Note that this results in a minor change where the chapter path changes from `README.md` to `index.md` in the output and the `--chapter` option. I think I'm ok with that change, though it would be easy to switch it back if that's an issue.
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Fixes #724