Add test

test/rustc_env_files/BUILD

@@ -8,8 +8,8 @@ package(default_visibility = ["//visibility:public"])
 rust_binary(
     name = "hello_env",
     srcs = ["src/main.rs"],
-    deps = ["@examples//hello_lib"],
     rustc_env_files = [":generate_rustc_env_file"],
+    deps = ["@examples//hello_lib"],
 )
 
 genrule(

test/unit/interleaved_cc_info/BUILD

@@ -0,0 +1,4 @@
+load(":interleaved_cc_info_test.bzl", "interleaved_cc_info_test_suite")
+
+############################ UNIT TESTS #############################
+interleaved_cc_info_test_suite(name = "interleaved_cc_info_test_suite")

test/unit/interleaved_cc_info/interleaved_cc_info_test.bzl

@@ -0,0 +1,89 @@
+"""Unittests for rust rules."""
+
+load("@bazel_skylib//lib:unittest.bzl", "analysistest", "asserts")
+load("//rust:defs.bzl", "rust_common", "rust_library")
+load("@rules_cc//cc:defs.bzl", "cc_library")
+
+def _interleaving_cc_link_order_test_impl(ctx):
+    env = analysistest.begin(ctx)
+    tut = analysistest.target_under_test(env)
+    cc_info = tut[CcInfo]
+    linker_inputs = cc_info.linking_context.linker_inputs.to_list()
+    a = linker_inputs[0]
+    b = linker_inputs[1]
+    c = linker_inputs[2]
+    d = linker_inputs[3]
+    e = linker_inputs[4]
+
+    asserts.equals(env, "a", a.owner.name)
+    asserts.equals(env, "b", b.owner.name)
+    asserts.equals(env, "c", c.owner.name)
+    asserts.equals(env, "d", d.owner.name)
+    asserts.equals(env, "e", e.owner.name)
+
+    return analysistest.end(env)
+
+interleaving_cc_link_order_test = analysistest.make(_interleaving_cc_link_order_test_impl)
+
+def _interleaving_rust_link_order_test_impl(ctx):
+    env = analysistest.begin(ctx)
+    tut = analysistest.target_under_test(env)
+    dep_info = tut[rust_common.dep_info]
+    return analysistest.end(env)
+
+interleaving_rust_link_order_test = analysistest.make(_interleaving_rust_link_order_test_impl)
+
+
+def _interleaving_cc_link_order_test():
+    rust_library(
+        name = "a",
+        srcs = ["a.rs"],
+        deps = [":b"],
+    )
+    cc_library(
+        name = "b",
+        srcs = ["b.cc"],
+        deps = [":c"],
+    )
+    rust_library(
+        name = "c",
+        srcs = ["c.rs"],
+        deps = [":d"],
+    )
+    cc_library(
+        name = "d",
+        srcs = ["d.cc"],
+        deps = [":e"],
+    )
+    rust_library(
+        name = "e",
+        srcs = ["e.rs"],
+    )
+
+
+    interleaving_cc_link_order_test(
+        name = "interleaving_cc_link_order_test",
+        target_under_test = ":a",
+    )
+
+    interleaving_rust_link_order_test(
+        name = "interleaving_rust_link_order_test",
+        target_under_test = ":a",
+    )
+
+def interleaved_cc_info_test_suite(name):
+    """Entry-point macro called from the BUILD file.
+
+    Args:
+        name: Name of the macro.
+    """
+    _interleaving_cc_link_order_test()
+    _interleaving_rust_link_order_test()
+
+    native.test_suite(
+        name = name,
+        tests = [
+            ":interleaving_cc_link_order_test",
+            ":interleaving_rust_link_order_test",
+        ],
+    )