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// Copyright 2014 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.unix;
import static com.google.common.truth.Truth.assertThat;
import static com.google.devtools.build.lib.testutil.MoreAsserts.assertThrows;
import com.google.devtools.build.lib.util.StringUtilities;
import com.google.devtools.build.lib.vfs.util.FsApparatus;
import java.io.IOException;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Tests for ProcMeminfoParser.
*/
@RunWith(JUnit4.class)
public class ProcMeminfoParserTest {
private FsApparatus scratch = FsApparatus.newNative();
@Test
public void memInfo() throws IOException, ProcMeminfoParser.KeywordNotFoundException {
String meminfoContent = StringUtilities.joinLines(
"MemTotal: 3091732 kB",
"MemFree: 2167344 kB",
"MemAvailable: 14717640 kB",
"Buffers: 60644 kB",
"Cached: 509940 kB",
"SwapCached: 0 kB",
"Active: 636892 kB",
"Inactive: 212760 kB",
"HighTotal: 0 kB",
"HighFree: 0 kB",
"LowTotal: 3091732 kB",
"LowFree: 2167344 kB",
"SwapTotal: 9124880 kB",
"SwapFree: 9124880 kB",
"Dirty: 0 kB",
"Writeback: 0 kB",
"AnonPages: 279028 kB",
"Mapped: 54404 kB",
"Slab: 42820 kB",
"PageTables: 5184 kB",
"NFS_Unstable: 0 kB",
"Bounce: 0 kB",
"CommitLimit: 10670744 kB",
"Committed_AS: 665840 kB",
"VmallocTotal: 34359738367 kB",
"VmallocUsed: 300484 kB",
"VmallocChunk: 34359437307 kB",
"HugePages_Total: 0",
"HugePages_Free: 0",
"HugePages_Rsvd: 0",
"Hugepagesize: 2048 kB",
"Bogus: not_a_number",
"Bogus2: 1000000000000000000000000000000000000000000000000 kB",
"Not even a valid line"
);
String meminfoFile = scratch.file("test_meminfo", meminfoContent).getPathString();
ProcMeminfoParser memInfo = new ProcMeminfoParser(meminfoFile);
assertThat(memInfo.getFreeRamKb()).isEqualTo(14717640);
assertThat(memInfo.getRamKb("Cached")).isEqualTo(509940);
assertThat(memInfo.getTotalKb()).isEqualTo(3091732);
assertThrows(ProcMeminfoParser.KeywordNotFoundException.class,
() -> memInfo.getRamKb("Bogus"));
assertThrows(ProcMeminfoParser.KeywordNotFoundException.class,
() -> memInfo.getRamKb("Bogus2"));
}
@Test
public void testOldKernelFallback() throws Exception {
String meminfoContent =
StringUtilities.joinLines(
"MemTotal: 3091732 kB",
"Active: 636892 kB",
"Inactive: 212760 kB",
"Slab: 42820 kB");
String meminfoFile = scratch.file("test_meminfo", meminfoContent).getPathString();
ProcMeminfoParser memInfo = new ProcMeminfoParser(meminfoFile);
assertThat(memInfo.getFreeRamKb()).isEqualTo(2356756);
}
}
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