test/com/facebook/buck/util/DefaultPropertyFinderTest.java

/*
 * Copyright 2014-present Facebook, Inc.
 *
 * 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.facebook.buck.util;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

import com.facebook.buck.io.ProjectFilesystem;
import com.google.common.base.Optional;
import com.google.common.collect.ImmutableMap;

import org.junit.Test;

import java.nio.file.Path;
import java.nio.file.Paths;

public class DefaultPropertyFinderTest {

  @Test
  public void whenPropertiesAreEmptyThenEnvironmentUsed() {
    DefaultPropertyFinder propertyFinder = new DefaultPropertyFinder(
        new ProjectFilesystem(Paths.get(".")),
        ImmutableMap.of("SOME_ENVIRONMENT_VARIABLE", "."));

    Optional<Path> path = propertyFinder.findDirectoryByPropertiesThenEnvironmentVariable(
        "NOT_A_PROPERTY_NAME",
        "SOME_ENVIRONMENT_VARIABLE"
    );
    assertTrue(path.isPresent());
    assertEquals(path.get(), Paths.get("."));
  }
}