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Add more documentation for testing on host

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This commit is contained in:
Christopher J. McClellan
2018-12-31 07:01:16 -05:00
parent 0e2aadf8f2
commit e58549b2ec
1 changed files with 9 additions and 0 deletions
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examples/test_on_host.rs
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@@ -1,5 +1,14 @@
//! Conditionally compiling tests with std and our executable with no_std. //! Conditionally compiling tests with std and our executable with no_std.
//! //!
//! Rust's built in unit testing framework requires the standard library,
//! but we need to build our final executable with no_std.
//! The testing framework also generates a `main` method, so we need to only use the `#[entry]`
//! annotation when building our final image.
//! For more information on why this example works, see this excellent blog post.
//! https://os.phil-opp.com/unit-testing/
//!
//! Running this example:
//!
//! Ensure there are no targets specified under `[build]` in `.cargo/config` //! Ensure there are no targets specified under `[build]` in `.cargo/config`
//! In order to make this work, we lose the convenience of having a default target that isn't the //! In order to make this work, we lose the convenience of having a default target that isn't the
//! host. //! host.