// Copyright 2018 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.exec.local;

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

import com.google.common.collect.ImmutableMap;
import java.util.Map;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;

/** Unit tests for {@link PosixLocalEnvProvider}. */
@RunWith(JUnit4.class)
public final class PosixLocalEnvProviderTest {

  private static Map<String, String> rewriteEnv(
      PosixLocalEnvProvider p,
      ImmutableMap<String, String> env,
      String localTmpRoot,
      String fallbackDir) {
    return p.rewriteLocalEnv(env, null, localTmpRoot, fallbackDir, null);
  }

  @Test
  public void testRewriteEnv() throws Exception {
    // localTmpRoot is specified, so ignore everything else.
    assertThat(
            rewriteEnv(
                new PosixLocalEnvProvider(ImmutableMap.of("TMPDIR", "client/env/tmpdir")),
                ImmutableMap.of("key1", "value1", "TMPDIR", "spawn/tmpdir"),
                "local/tmp",
                "fallback/dir"))
        .isEqualTo(ImmutableMap.of("key1", "value1", "TMPDIR", "local/tmp"));

    // localTmpRoot is empty, fall back to the client environment's TMPDIR.
    assertThat(
            rewriteEnv(
                new PosixLocalEnvProvider(ImmutableMap.of("TMPDIR", "client/tmpdir")),
                ImmutableMap.of("key1", "value1", "TMPDIR", "spawn/tmpdir"),
                "",
                "fallback/dir"))
        .isEqualTo(ImmutableMap.of("key1", "value1", "TMPDIR", "client/tmpdir"));

    // localTmpRoot and the client environment's TMPDIR are empty, fall back to /tmp.
    assertThat(
            rewriteEnv(
                new PosixLocalEnvProvider(ImmutableMap.of("TMPDIR", "")),
                ImmutableMap.of("key1", "value1", "TMPDIR", "spawn/tmpdir"),
                "",
                "fallback/dir"))
        .isEqualTo(ImmutableMap.of("key1", "value1", "TMPDIR", "/tmp"));
  }
}