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44 lines
1.7 KiB
Markdown
44 lines
1.7 KiB
Markdown
# The `run-make` test suite
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The `run-make` test suite contains tests which are the most flexible out of all
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the [rust-lang/rust](https://github.com/rust-lang/rust) test suites. `run-make`
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tests can basically contain arbitrary code, and are supported by the
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[`run_make_support`] library.
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## Infrastructure
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There are two kinds of run-make tests:
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1. The new `rmake.rs` version: this allows run-make tests to be written in Rust
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(with `rmake.rs` as the main test file).
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2. The legacy `Makefile` version: this is what run-make tests were written with
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before support for `rmake.rs` was introduced.
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The implementation for collecting and building the `rmake.rs` recipes (or
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`Makefile`s) are in
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[`src/tools/compiletest/src/runtest.rs`](../../src/tools/compiletest/src/runtest.rs),
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in `run_rmake_v2_test` and `run_rmake_legacy_test`.
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### Rust-based `run-make` tests: `rmake.rs`
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The setup for the `rmake.rs` version is a 3-stage process:
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1. First, we build the [`run_make_support`] library in bootstrap as a tool lib.
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2. Then, we compile the `rmake.rs` "recipe" linking the support library and its
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dependencies in, and provide a bunch of env vars. We setup a directory
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structure within `build/<target>/test/run-make/`
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```
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<test-name>/
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rmake.exe # recipe binary
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rmake_out/ # sources from test sources copied over
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```
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and copy non-`rmake.rs` input support files over to `rmake_out/`. The
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support library is made available as an [*extern prelude*][extern_prelude].
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3. Finally, we run the recipe binary and set `rmake_out/` as the working
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directory.
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[`run_make_support`]: ../../src/tools/run-make-support
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[extern_prelude]: https://doc.rust-lang.org/reference/names/preludes.html#extern-prelude
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