// 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.
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package com.google.devtools.build.lib.buildtool;

import static com.google.common.truth.Truth.assertThat;
import static org.junit.Assert.assertThrows;

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

/**
 * Regression test for bug #649512: an action that doesn't generate the
 * outputs it's supposed to should cause an error to be reported, but not a
 * crash.
 */
@TestSpec(size = Suite.MEDIUM_TESTS)
@RunWith(JUnit4.class)
public class NoOutputActionTest extends BuildIntegrationTestCase {

  @Test
  public void testNoOutput() throws Exception {
    MockGenruleSupport.setup(mockToolsConfig);
    write("nooutput/BUILD",
          "genrule(name = 'nooutput', ",
          "        outs = ['out1', 'out2'],  ",
          "        cmd = '/bin/true')");

    BuildFailedException e =
        assertThrows(BuildFailedException.class, () -> buildTarget("//nooutput"));
    assertThat(e)
        .hasMessageThat()
        .contains("nooutput/BUILD:1:1 not all outputs were created or valid");
    events.assertContainsError("declared output 'nooutput/out1' was not created by genrule");
    events.assertContainsError("declared output 'nooutput/out2' was not created by genrule");
  }

}