test/test_env/BUILD.bazel

load("//rust:defs.bzl", "rust_binary", "rust_test")

rust_binary(
    name = "hello-world",
    srcs = ["src/main.rs"],
    edition = "2018",
)

filegroup(
    name = "hello_world_main",
    srcs = ["src/main.rs"],
)

rust_test(
    name = "test_run",
    srcs = ["tests/run.rs"],
    data = [
        ":hello-world",
        ":hello_world_main",
    ],
    edition = "2018",
    env = {
        "FERRIS_SAYS": "Hello fellow Rustaceans!",
        "HELLO_WORLD_BIN_ROOTPATH": "$(rootpath :hello-world)",
    },
    # `CARGO_BIN_EXE` behaves similarly to `CARGO_MANIFEST_DIR`. See
    # the comment on `test_manifest_dir`.
    target_compatible_with = select({
        "@platforms//os:windows": ["@platforms//:incompatible"],
        "//conditions:default": [],
    }),
)

rust_test(
    name = "test_manifest_dir",
    srcs = ["tests/manifest_dir.rs"],
    data = ["src/manifest_dir_file.txt"],
    edition = "2018",
    # `CARGO_MANIFEST_DIR` relies on relative paths that often align with
    # runfiles paths but on Windows it's the common case that runfiles
    # directories may not exist due to the system not having symlinks enabled.
    # Thus this test is not run for now. Perhaps in the future these variables
    # will switch to being runfiles paths so it's commonly usable across
    # platforms. However, this would violate the expectation of Cargo so
    # it's left as-is for now.
    target_compatible_with = select({
        "@platforms//os:windows": ["@platforms//:incompatible"],
        "//conditions:default": [],
    }),
)