tests/run-make/rustdoc-dep-info/rmake.rs

// This is a simple smoke test for rustdoc's `--emit dep-info` feature. It prints out
// information about dependencies in a Makefile-compatible format, as a `.d` file.

//@ needs-target-std

use run_make_support::assertion_helpers::assert_contains;
use run_make_support::{path, rfs, rustdoc};

fn main() {
    // We're only emitting dep info, so we shouldn't be running static analysis to
    // figure out that this program is erroneous.
    rustdoc().input("lib.rs").arg("-Zunstable-options").emit("dep-info").run();

    let content = rfs::read_to_string("foo.d");
    assert_contains(&content, "lib.rs:");
    assert_contains(&content, "foo.rs:");
    assert_contains(&content, "bar.rs:");
    assert_contains(&content, "doc.md:");

    // Now we check that we can provide a file name to the `dep-info` argument.
    rustdoc().input("lib.rs").arg("-Zunstable-options").emit("dep-info=bla.d").run();
    assert!(path("bla.d").exists());
}