// Copyright 2020 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.buildtool;

import static org.junit.Assert.assertThrows;

import com.google.devtools.build.lib.actions.BuildFailedException;
import com.google.devtools.build.lib.buildtool.util.BuildIntegrationTestCase;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/**
 * Integration test for warnings issued when an artifact is a directory.
 */
@RunWith(JUnit4.class)
public class DirectoryArtifactWarningTest extends BuildIntegrationTestCase {

  private void setupGenruleWithOutputArtifactDirectory() throws Exception {
    write(
        "x/BUILD",
        "genrule(name = 'x',",
        "        outs = ['dir'],",
        "        cmd = 'mkdir $(location dir)',",
        "        srcs = [])");
  }

  @Test
  public void testOutputArtifactDirectoryWarning_forGenrule() throws Exception {
    setupGenruleWithOutputArtifactDirectory();

    buildTarget("//x");

    events.assertContainsWarning(
        "output 'x/dir' of //x:x is a directory; "
            + "dependency checking of directories is unsound");
  }

  @Test
  public void testOutputArtifactDirectoryError_forGenrule() throws Exception {
    setupGenruleWithOutputArtifactDirectory();

    addOptions("--incompatible_disallow_unsound_directory_outputs");
    assertThrows(BuildFailedException.class, () -> buildTarget("//x"));

    events.assertContainsError(
        "output 'x/dir' of //x:x is a directory; "
            + "dependency checking of directories is unsound");
  }

  private void setupStarlarkRuleWithOutputArtifactDirectory() throws Exception {
    write(
        "x/defs.bzl",
        "def _impl(ctx):",
        "  ctx.actions.run_shell(",
        "    outputs = [ctx.outputs.out],",
        "    command = 'mkdir %s' % ctx.outputs.out.path,",
        "  )",
        "",
        "my_rule = rule(",
        "  implementation = _impl,",
        "  attrs = {",
        "    'out': attr.output(),",
        "  },",
        ")");
    write("x/BUILD", "load('defs.bzl', 'my_rule')", "my_rule(name = 'x', out = 'dir')");
  }

  @Test
  public void testOutputArtifactDirectoryWarning_forStarlarkRule() throws Exception {
    setupStarlarkRuleWithOutputArtifactDirectory();

    buildTarget("//x");

    events.assertContainsWarning(
        "output 'x/dir' of //x:x is a directory; "
            + "dependency checking of directories is unsound");
  }

  @Test
  public void testOutputArtifactDirectoryError_forStarlarkRule() throws Exception {
    setupStarlarkRuleWithOutputArtifactDirectory();

    addOptions("--incompatible_disallow_unsound_directory_outputs");
    assertThrows(BuildFailedException.class, () -> buildTarget("//x"));

    events.assertContainsError(
        "output 'x/dir' of //x:x is a directory; "
            + "dependency checking of directories is unsound");
  }

  @Test
  public void testInputArtifactDirectoryWarning_forGenrule() throws Exception {
    write(
        "x/BUILD",
        "genrule(name = 'x',",
        "        outs = ['out'],",
        "        cmd = 'touch $(location out)',",
        "        srcs = ['dir'])");
    write("x/dir/empty");

    buildTarget("//x");

    events.assertContainsWarning(
        "input 'x/dir' to //x:x is a directory; "
            + "dependency checking of directories is unsound");
  }

  @Test
  public void testInputArtifactDirectoryWarning_forStarlarkRule() throws Exception {
    write(
        "x/defs.bzl",
        "def _impl(ctx):",
        "  ctx.actions.run_shell(",
        "    inputs = [ctx.file.src],",
        "    outputs = [ctx.outputs.out],",
        "    command = 'touch %s' % ctx.outputs.out.path,",
        "  )",
        "",
        "my_rule = rule(",
        "  implementation = _impl,",
        "  attrs = {",
        "    'src': attr.label(allow_single_file = True),",
        "    'out': attr.output(),",
        "  },",
        ")");
    write(
        "x/BUILD", "load('defs.bzl', 'my_rule')", "my_rule(name = 'x', src = 'dir', out = 'out')");
    write("x/dir/empty");

    buildTarget("//x");

    events.assertContainsWarning(
        "input 'x/dir' to //x:x is a directory; "
            + "dependency checking of directories is unsound");
  }
}