Restore Rust examples and add Rust rule tests that were inadvertently…

… excluded.

--
MOS_MIGRATED_REVID=99464781

examples/rust/hello_lib/BUILD

@@ -0,0 +1,17 @@
+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"],
+)

examples/rust/hello_lib/src/greeter.rs

@@ -0,0 +1,31 @@
+// 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);
+    }
+}

examples/rust/hello_lib/src/lib.rs

@@ -0,0 +1,15 @@
+// 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;

examples/rust/hello_lib/tests/greeting.rs

@@ -0,0 +1,23 @@
+// 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"));
+}

examples/rust/hello_world/BUILD

@@ -0,0 +1,9 @@
+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"],
+)

examples/rust/hello_world/src/main.rs

@@ -0,0 +1,22 @@
+// 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");
+}

tools/build_rules/rust/test/BUILD

@@ -0,0 +1,3 @@
+load("rust_rule_test", "rust_rule_test")
+
+rust_rule_test("//examples/rust")

tools/build_rules/rust/test/rust_rule_test.bzl

@@ -0,0 +1,63 @@
+"""Tests for rust rules."""
+#
+# 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.
+
+load("/third_party/bazel/tools/build_rules/rust/rust",
+     "rust_library", "rust_binary", "rust_test")
+load("/third_party/bazel/tools/build_rules/test_rules",
+     "success_target",
+     "successful_test",
+     "failure_target",
+     "failed_test",
+     "assert_",
+     "strip_prefix",
+     "expectation_description",
+     "check_results",
+     "load_results",
+     "analysis_results",
+     "rule_test",
+     "file_test")
+
+
+def _rust_library_test(package):
+  rule_test(
+      name="hello_lib_rule_test",
+      generates=["libhello_lib.rlib"],
+      provides={
+          "rust_lib": "/libhello_lib.rlib$",
+          "transitive_libs": "^\\[\\]$"},
+      rule=package + "/hello_lib:hello_lib")
+
+
+def _rust_binary_test(package):
+  rule_test(
+      name="hello_world_rule_test",
+      generates=["hello_world"],
+      rule=package + "/hello_world:hello_world")
+
+
+def _rust_test_test(package):
+  """Issue rule tests for rust_test."""
+  rule_test(
+      name="greeting_rule_test",
+      generates=["greeting"],
+      rule=package + "/hello_lib:greeting")
+
+
+def rust_rule_test(package):
+  """Issue simple tests on rust rules."""
+  _rust_library_test(package)
+  _rust_binary_test(package)
+  _rust_test_test(package)