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// Copyright 2014 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.objc;

import static com.google.devtools.build.lib.packages.Attribute.ConfigurationTransition.HOST;
import static com.google.devtools.build.lib.packages.Attribute.attr;
import static com.google.devtools.build.lib.packages.BuildType.LABEL;
import static com.google.devtools.build.lib.packages.BuildType.LABEL_LIST;
import static com.google.devtools.build.lib.rules.objc.ObjcRuleClasses.BundlingRule;
import static com.google.devtools.build.lib.syntax.Type.BOOLEAN;
import static com.google.devtools.build.lib.syntax.Type.STRING_LIST;

import com.google.common.collect.ImmutableList;
import com.google.devtools.build.lib.analysis.BaseRuleClasses;
import com.google.devtools.build.lib.analysis.RuleDefinition;
import com.google.devtools.build.lib.analysis.RuleDefinitionEnvironment;
import com.google.devtools.build.lib.analysis.config.BuildConfiguration;
import com.google.devtools.build.lib.cmdline.Label;
import com.google.devtools.build.lib.packages.Attribute.ComputedDefault;
import com.google.devtools.build.lib.packages.Attribute.LateBoundLabelList;
import com.google.devtools.build.lib.packages.AttributeMap;
import com.google.devtools.build.lib.packages.ImplicitOutputsFunction;
import com.google.devtools.build.lib.packages.Rule;
import com.google.devtools.build.lib.packages.RuleClass;
import com.google.devtools.build.lib.packages.RuleClass.Builder.RuleClassType;
import com.google.devtools.build.lib.rules.apple.AppleConfiguration;
import com.google.devtools.build.lib.syntax.Type;
import com.google.devtools.build.lib.util.FileType;

import java.util.List;

/**
 * Rule definition for {@code ios_test} rule in Bazel.
 */
public class IosTestRule implements RuleDefinition {

  @Override
  public RuleClass build(RuleClass.Builder builder, final RuleDefinitionEnvironment env) {
    final ImmutableList<Label> gcov =
        ImmutableList.of(env.getToolsLabel("//tools/objc:gcov"));
    return builder
        .requiresConfigurationFragments(
            ObjcConfiguration.class, J2ObjcConfiguration.class, AppleConfiguration.class)
        /*<!-- #BLAZE_RULE(ios_test).IMPLICIT_OUTPUTS -->
        <ul>
        <li><code><var>name</var>.ipa</code>: the test bundle as an
        <code>.ipa</code> file
        <li><code><var>name</var>.xcodeproj/project.pbxproj: An Xcode project file which can be
        used to develop or build on a Mac.</li>
        </ul>
        <!-- #END_BLAZE_RULE.IMPLICIT_OUTPUTS -->*/
        .setImplicitOutputsFunction(
            ImplicitOutputsFunction.fromFunctions(ReleaseBundlingSupport.IPA, XcodeSupport.PBXPROJ))
        /* <!-- #BLAZE_RULE(ios_test ).ATTRIBUTE(target_device) -->
        The device against which to run the test.
        <!-- #END_BLAZE_RULE.ATTRIBUTE -->*/
        .add(
            attr(IosTest.TARGET_DEVICE, LABEL)
                .allowedFileTypes()
                .allowedRuleClasses("ios_device")
                .value(
                    env.getToolsLabel("//tools/objc/sim_devices:default")))
        /* <!-- #BLAZE_RULE(ios_test ).ATTRIBUTE(xctest) -->
        Whether this target contains tests using the XCTest testing framework.
        <!-- #END_BLAZE_RULE.ATTRIBUTE -->*/
        .add(attr(IosTest.IS_XCTEST_ATTR, BOOLEAN).value(true))
        /* <!-- #BLAZE_RULE(ios_test ).ATTRIBUTE(xctest_app) -->
        A <code>objc_binary</code> or <code>ios_application</code> target that contains the
        app bundle to test against in XCTest.
        This attribute is only valid if <code>xctest</code> is true.
        <!-- #END_BLAZE_RULE.ATTRIBUTE -->*/
        .add(
            attr(IosTest.XCTEST_APP_ATTR, LABEL)
                .value(
                    new ComputedDefault(IosTest.IS_XCTEST_ATTR) {
                      @Override
                      public Object getDefault(AttributeMap rule) {
                        return rule.get(IosTest.IS_XCTEST_ATTR, Type.BOOLEAN)
                            // No TOOLS_REPOSITORY prefix for the xctest_app tool; xcode projects
                            // referencing a dependency under a repository do not work. Thus,
                            // this target must be available in the target depot.
                            ? env.getLabel("//tools/objc:xctest_app")
                            : null;
                      }
                    })
                .allowedFileTypes()
                // TODO(bazel-team): Remove objc_binary once it stops exporting XcTestAppProvider.
                .allowedRuleClasses("objc_binary", "ios_application"))
        .override(
            attr(BundlingRule.INFOPLIST_ATTR, LABEL)
                .value(
                    new ComputedDefault(IosTest.IS_XCTEST_ATTR) {
                      @Override
                      public Object getDefault(AttributeMap rule) {
                        return rule.get(IosTest.IS_XCTEST_ATTR, Type.BOOLEAN)
                            // No TOOLS_REPOSITORY prefix for the xctest_app tool; xcode projects
                            // referencing a dependency under a repository do not work. Thus,
                            // this target must be available in the target depot.
                            ? env.getLabel("//tools/objc:xctest_infoplist")
                            : null;
                      }
                    })
                .allowedFileTypes(ObjcRuleClasses.PLIST_TYPE))
        /* <!-- #BLAZE_RULE(ios_test).ATTRIBUTE(ios_test_target_device) -->
        The device against how to run the test. If this attribute is defined, the test will run on
        the lab device. Otherwise, the test will run on simulator.
        <!-- #END_BLAZE_RULE.ATTRIBUTE -->*/
        .add(
            attr(IosTest.TEST_TARGET_DEVICE_ATTR, LABEL)
                .allowedFileTypes()
                .allowedRuleClasses("ios_lab_device"))
        /* <!-- #BLAZE_RULE(ios_test).ATTRIBUTE(ios_device_arg) -->
        Extra arguments to pass to the <code>ios_test_target_device</code>'s binary. They should be
        in the form KEY=VALUE or simply KEY (check your device's documentation for allowed
        parameters).
        <!-- #END_BLAZE_RULE.ATTRIBUTE -->*/
        .add(attr(IosTest.DEVICE_ARG_ATTR, STRING_LIST))
        /* <!-- #BLAZE_RULE(ios_test).ATTRIBUTE(plugins) -->
        Plugins to pass to the test runner.
        <!-- #END_BLAZE_RULE.ATTRIBUTE -->*/
        .add(attr(IosTest.PLUGINS_ATTR, LABEL_LIST).allowedFileTypes(FileType.of("_deploy.jar")))
        .add(
            attr(IosTest.TEST_TEMPLATE_ATTR, LABEL)
                .value(env.getToolsLabel("//tools/objc:ios_test.sh.bazel_template")))
        .add(
            attr(IosTest.TEST_RUNNER_ATTR, LABEL)
                .value(env.getToolsLabel("//tools/objc:testrunner")))
        .add(
            attr(IosTest.MEMLEAKS_DEP_ATTR, LABEL)
                .value(env.getToolsLabel("//tools/objc/memleaks:memleaks")))
        .add(
            attr(IosTest.MEMLEAKS_PLUGIN_ATTR, LABEL)
                .value(env.getToolsLabel("//tools/objc:memleaks_plugin")))
        .override(
            attr(IosTest.GCOV_ATTR, LABEL_LIST)
                .cfg(HOST)
                .value(
                    new LateBoundLabelList<BuildConfiguration>(gcov) {
                      @Override
                      public List<Label> getDefault(Rule rule, AttributeMap attributes,
                          BuildConfiguration configuration) {
                        if (!configuration.isCodeCoverageEnabled()) {
                          return ImmutableList.of();
                        }
                        return gcov;
                      }
                    }))
        .build();
  }

  @Override
  public Metadata getMetadata() {
    return RuleDefinition.Metadata.builder()
        .name("ios_test")
        .type(RuleClassType.TEST)
        .ancestors(
            BaseRuleClasses.BaseRule.class,
            BaseRuleClasses.TestBaseRule.class,
            ObjcRuleClasses.CompilingRule.class,
            ObjcRuleClasses.ReleaseBundlingRule.class,
            ObjcRuleClasses.LinkingRule.class,
            ObjcRuleClasses.XcodegenRule.class,
            ObjcRuleClasses.SimulatorRule.class)
        .factoryClass(IosTest.class)
        .build();
  }
}

/*<!-- #BLAZE_RULE (NAME = ios_test, TYPE = TEST, FAMILY = Objective-C) -->

<p>This rule provides a way to build iOS unit tests written in KIF, GTM and XCTest test frameworks
on both iOS simulator and real devices.
</p>

<!-- #END_BLAZE_RULE -->*/