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// Copyright 2017 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.common.truth.Truth.assertThat;
import static org.junit.Assert.fail;
import com.google.common.base.Functions;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Iterables;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Test case for the Interspersing utility. */
@RunWith(JUnit4.class)
public class InterspersingTest {
@Test
public void beforeEach_empty() {
assertThat(Interspersing.beforeEach("foo", ImmutableList.<String>of())).isEmpty();
}
@Test
public void beforeEach_isLazy() {
Iterable<Integer> result = Interspersing.beforeEach(1011, Iterables.cycle(1, 2, 3));
assertThat(Iterables.get(result, 0)).isEqualTo((Object) 1011);
assertThat(Iterables.get(result, 1)).isEqualTo((Object) 1);
assertThat(Iterables.get(result, 2)).isEqualTo((Object) 1011);
assertThat(Iterables.get(result, 3)).isEqualTo((Object) 2);
}
@Test
public void beforeEach_throwsForNullWhat() {
try {
Interspersing.beforeEach(null, ImmutableList.of("a"));
fail("should have thrown");
} catch (NullPointerException expected) {}
}
@Test
public void prependEach_empty() {
assertThat(Interspersing.prependEach("foo", ImmutableList.<String>of())).isEmpty();
}
@Test
public void prependEach_isLazy() {
Iterable<String> result = Interspersing.prependEach(
"#", Iterables.cycle(1, 2, 3), Functions.toStringFunction());
assertThat(Iterables.get(result, 0)).isEqualTo("#1");
}
@Test
public void prependEach_typicalList() {
Iterable<String> result = Interspersing.prependEach(
"*", ImmutableList.of("a", "b", "c"));
assertThat(result).containsExactly("*a", "*b", "*c").inOrder();
}
@Test
public void prependEach_throwsForNullWhat() {
try {
Interspersing.prependEach(null, ImmutableList.of("a"));
fail("should have thrown");
} catch (NullPointerException expected) {}
}
}
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