Introduce trivial rust tests

--
MOS_MIGRATED_REVID=99378104

7 files changed, 8 insertions, 124 deletions

diff --git a/examples/rust/hello_lib/BUILD b/examples/rust/hello_lib/BUILD
deleted file mode 100644
index 64cc935b27..0000000000
--- a/examples/rust/hello_lib/BUILD
+++ /dev/null
@@ -1,17 +0,0 @@
-package(default_visibility = ["//visibility:public"])
-
-load("/tools/build_rules/rust/rust", "rust_library", "rust_test")
-
-rust_library(
-    name = "hello_lib",
-    srcs = [
-        "src/greeter.rs",
-        "src/lib.rs",
-    ],
-)
-
-rust_test(
-    name = "greeting",
-    srcs = ["tests/greeting.rs"],
-    deps = [":hello_lib"],
-)
diff --git a/examples/rust/hello_lib/src/greeter.rs b/examples/rust/hello_lib/src/greeter.rs
deleted file mode 100644
index be59ff888d..0000000000
--- a/examples/rust/hello_lib/src/greeter.rs
+++ /dev/null
@@ -1,31 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//    http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-pub struct Greeter {
-    greeting: String,
-}
-
-impl Greeter {
-    pub fn new(greeting: &str) -> Greeter {
-        Greeter { greeting: greeting.to_string(), }
-    }
-
-    pub fn greeting(&self, thing: &str) -> String {
-        format!("{} {}", &self.greeting, thing)
-    }
-
-    pub fn greet(&self, thing: &str) {
-        println!("{} {}", &self.greeting, thing);
-    }
-}
diff --git a/examples/rust/hello_lib/src/lib.rs b/examples/rust/hello_lib/src/lib.rs
deleted file mode 100644
index 8f2b5a11f5..0000000000
--- a/examples/rust/hello_lib/src/lib.rs
+++ /dev/null
@@ -1,15 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//    http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-pub mod greeter;
diff --git a/examples/rust/hello_lib/tests/greeting.rs b/examples/rust/hello_lib/tests/greeting.rs
deleted file mode 100644
index 842ba2983b..0000000000
--- a/examples/rust/hello_lib/tests/greeting.rs
+++ /dev/null
@@ -1,23 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//    http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-extern crate hello_lib;
-
-use hello_lib::greeter;
-
-#[test]
-fn test_greeting() {
-    let hello = greeter::Greeter::new("Hello");
-    assert_eq!("Hello world", hello.greeting("world"));
-}
diff --git a/examples/rust/hello_world/BUILD b/examples/rust/hello_world/BUILD
deleted file mode 100644
index e774dcc835..0000000000
--- a/examples/rust/hello_world/BUILD
+++ /dev/null
@@ -1,9 +0,0 @@
-package(default_visibility = ["//visibility:public"])
-
-load("/tools/build_rules/rust/rust", "rust_binary")
-
-rust_binary(
-    name = "hello_world",
-    srcs = ["src/main.rs"],
-    deps = ["//examples/rust/hello_lib"],
-)
diff --git a/examples/rust/hello_world/src/main.rs b/examples/rust/hello_world/src/main.rs
deleted file mode 100644
index 2e837ce0bb..0000000000
--- a/examples/rust/hello_world/src/main.rs
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright 2015 Google Inc. All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//    http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-extern crate hello_lib;
-
-use hello_lib::greeter;
-
-fn main() {
-    let hello = greeter::Greeter::new("Hello");
-    hello.greet("world");
-}
diff --git a/tools/build_rules/test_rules.bzl b/tools/build_rules/test_rules.bzl
index 450672249f..a083731efd 100644
--- a/tools/build_rules/test_rules.bzl
+++ b/tools/build_rules/test_rules.bzl
@@ -1,3 +1,5 @@
+"""Utilities for testing bazel."""
+#
 # Copyright 2015 Google Inc. All rights reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
@@ -11,7 +13,6 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
-"""test_rules.bzl: Utilities for testing bazel."""
 
 ### First, trivial tests that either always pass, always fail,
 ### or sometimes pass depending on a trivial computation.
@@ -191,15 +192,15 @@ def _rule_test_impl(ctx):
   rule_ = ctx.attr.rule
   rule_name = str(rule_.label)
   exe = ctx.outputs.executable
-  if ctx.attr.generates != []:
-    prefix = ctx.label.package + "/"
+  if ctx.attr.generates:
+    prefix = rule_.label.package + "/"
     generates = ctx.attr.generates
     generated = [strip_prefix(prefix, f.short_path) for f in rule_.files]
     if generates != generated:
       fail("rule %s generates %s not %s"
            % (rule_name, repr(generated), repr(generates)))
   provides = ctx.attr.provides
-  if provides != {}:
+  if provides:
     files = []
     commands = []
     for k in provides.keys():
@@ -239,11 +240,11 @@ def _file_test_impl(ctx):
   content = ctx.attr.content
   regexp = ctx.attr.regexp
   matches = ctx.attr.matches
-  if (content == "") == (regexp == ""):
+  if bool(content) == bool(regexp):
     fail("Must specify one and only one of content or regexp")
-  if content != "" and matches != -1:
+  if content and matches != -1:
     fail("matches only makes sense with regexp")
-  if content != "":
+  if content:
     dat = ctx.new_file(ctx.data_configuration.genfiles_dir, exe, ".dat")
     ctx.file_action(
         output=dat,