PlatformCommonTest.java example

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// Copyright 2017 The Bazel Authors. 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.

package com.google.devtools.build.lib.rules.platform;

import static com.google.common.truth.Truth.assertThat;

import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.platform.ConstraintSettingInfo;
import com.google.devtools.build.lib.analysis.platform.ConstraintValueInfo;
import com.google.devtools.build.lib.analysis.platform.ToolchainInfo;
import com.google.devtools.build.lib.packages.SkylarkClassObjectConstructor;
import com.google.devtools.build.lib.skylark.util.SkylarkTestCase;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** Tests for {@link PlatformCommon}. */
@RunWith(JUnit4.class)
public class PlatformCommonTest extends SkylarkTestCase {

  @Test
  public void testCreateToolchainType() throws Exception {
    scratch.file(
        "test/toolchain_type.bzl",
        "test_toolchain_type = platform_common.toolchain_type()",
        "def _impl(ctx):",
        "    toolchain = test_toolchain_type(",
        "        exec_compatible_with = ctx.attr.exec_compatible_with,",
        "        target_compatible_with = ctx.attr.target_compatible_with,",
        "        extra_label = ctx.attr.extra_label,",
        "        extra_str = ctx.attr.extra_str,",
        "    )",
        "    return [toolchain]",
        "test_toolchain = rule(",
        "    implementation = _impl,",
        "    attrs = {",
        "       'exec_compatible_with': attr.label_list(",
        "           providers = [platform_common.ConstraintValueInfo]),",
        "       'target_compatible_with': attr.label_list(",
        "           providers = [platform_common.ConstraintValueInfo]),",
        "       'extra_label': attr.label(),",
        "       'extra_str': attr.string(),",
        "    }",
        ")");
    scratch.file(
        "test/BUILD",
        "load(':toolchain_type.bzl', 'test_toolchain')",
        "constraint_setting(name = 'os')",
        "constraint_value(name = 'linux',",
        "    constraint_setting = ':os')",
        "constraint_value(name = 'mac',",
        "    constraint_setting = ':os')",
        "filegroup(name = 'dep_rule')",
        "test_toolchain(",
        "    name = 'linux_toolchain',",
        "    exec_compatible_with = [",
        "      ':linux',",
        "    ],",
        "    target_compatible_with = [",
        "      ':mac',",
        "    ],",
        "    extra_label = ':dep_rule',",
        "    extra_str = 'bar',",
        ")");

    ConfiguredTarget configuredTarget = getConfiguredTarget("//test:linux_toolchain");
    ToolchainInfo toolchainInfo =
        (ToolchainInfo) configuredTarget.get(ToolchainInfo.SKYLARK_IDENTIFIER);
    assertThat(toolchainInfo).isNotNull();

    assertThat(toolchainInfo.toolchainConstructorKey()).isNotNull();
    assertThat(toolchainInfo.toolchainConstructorKey())
        .isEqualTo(
            new SkylarkClassObjectConstructor.SkylarkKey(
                makeLabel("//test:toolchain_type.bzl"), "test_toolchain_type"));

    assertThat(toolchainInfo.execConstraints())
        .containsExactly(
            ConstraintValueInfo.create(
                ConstraintSettingInfo.create(makeLabel("//test:os")), makeLabel("//test:linux")));
    assertThat(toolchainInfo.targetConstraints())
        .containsExactly(
            ConstraintValueInfo.create(
                ConstraintSettingInfo.create(makeLabel("//test:os")), makeLabel("//test:mac")));

    assertThat(((ConfiguredTarget) toolchainInfo.getValue("extra_label")).getLabel())
        .isEqualTo(makeLabel("//test:dep_rule"));
    assertThat(toolchainInfo.getValue("extra_str")).isEqualTo("bar");
  }
}