proc_stat_test.go

Documentation: github.com/prometheus/procfs

     1  // Copyright 2018 The Prometheus Authors
     2  // Licensed under the Apache License, Version 2.0 (the "License");
     3  // you may not use this file except in compliance with the License.
     4  // You may obtain a copy of the License at
     5  //
     6  // http://www.apache.org/licenses/LICENSE-2.0
     7  //
     8  // Unless required by applicable law or agreed to in writing, software
     9  // distributed under the License is distributed on an "AS IS" BASIS,
    10  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    11  // See the License for the specific language governing permissions and
    12  // limitations under the License.
    13  
    14  package procfs
    15  
    16  import (
    17  	"math"
    18  	"os"
    19  	"testing"
    20  )
    21  
    22  func TestProcStat(t *testing.T) {
    23  	p, err := getProcFixtures(t).Proc(26231)
    24  	if err != nil {
    25  		t.Fatal(err)
    26  	}
    27  
    28  	s, err := p.Stat()
    29  	if err != nil {
    30  		t.Fatal(err)
    31  	}
    32  
    33  	// pid stat int fields
    34  	for _, test := range []struct {
    35  		name string
    36  		want int
    37  		have int
    38  	}{
    39  		{name: "pid", want: 26231, have: s.PID},
    40  		{name: "user time", want: 1677, have: int(s.UTime)},
    41  		{name: "system time", want: 44, have: int(s.STime)},
    42  		{name: "start time", want: 82375, have: int(s.Starttime)},
    43  		{name: "virtual memory size", want: 56274944, have: int(s.VSize)},
    44  		{name: "resident set size", want: 1981, have: s.RSS},
    45  	} {
    46  		if test.want != test.have {
    47  			t.Errorf("want %s %d, have %d", test.name, test.want, test.have)
    48  		}
    49  	}
    50  
    51  	// pid stat uint64 fields
    52  	for _, test := range []struct {
    53  		name string
    54  		want uint64
    55  		have uint64
    56  	}{
    57  		{name: "RSS Limit", want: 18446744073709551615, have: s.RSSLimit},
    58  		{name: "delayacct_blkio_ticks", want: 31, have: s.DelayAcctBlkIOTicks},
    59  	} {
    60  		if test.want != test.have {
    61  			t.Errorf("want %s %d, have %d", test.name, test.want, test.have)
    62  		}
    63  	}
    64  
    65  	// pid stat uint fields
    66  	for _, test := range []struct {
    67  		name string
    68  		want uint
    69  		have uint
    70  	}{
    71  		{name: "processor", want: 0, have: s.Processor},
    72  		{name: "rt_priority", want: 0, have: s.RTPriority},
    73  		{name: "policy", want: 0, have: s.Policy},
    74  	} {
    75  		if test.want != test.have {
    76  			t.Errorf("want %s %d, have %d", test.name, test.want, test.have)
    77  		}
    78  	}
    79  }
    80  
    81  func TestProcStatLimits(t *testing.T) {
    82  	p, err := getProcFixtures(t).Proc(26232)
    83  	if err != nil {
    84  		t.Fatal(err)
    85  	}
    86  
    87  	s, err := p.Stat()
    88  	if err != nil {
    89  		t.Errorf("want not error, have %s", err)
    90  	}
    91  
    92  	// max values of stat int fields
    93  	for _, test := range []struct {
    94  		name string
    95  		want int
    96  		have int
    97  	}{
    98  		{name: "waited for children user time", want: math.MinInt64, have: s.CUTime},
    99  		{name: "waited for children system time", want: math.MaxInt64, have: s.CSTime},
   100  	} {
   101  		if test.want != test.have {
   102  			t.Errorf("want %s %d, have %d", test.name, test.want, test.have)
   103  		}
   104  	}
   105  }
   106  
   107  func TestProcStatComm(t *testing.T) {
   108  	s1, err := testProcStat(26231)
   109  	if err != nil {
   110  		t.Fatal(err)
   111  	}
   112  	if want, have := "vim", s1.Comm; want != have {
   113  		t.Errorf("want comm %s, have %s", want, have)
   114  	}
   115  
   116  	s2, err := testProcStat(584)
   117  	if err != nil {
   118  		t.Fatal(err)
   119  	}
   120  	if want, have := "(a b ) ( c d) ", s2.Comm; want != have {
   121  		t.Errorf("want comm %s, have %s", want, have)
   122  	}
   123  }
   124  
   125  func TestProcStatVirtualMemory(t *testing.T) {
   126  	s, err := testProcStat(26231)
   127  	if err != nil {
   128  		t.Fatal(err)
   129  	}
   130  
   131  	if want, have := 56274944, int(s.VirtualMemory()); want != have {
   132  		t.Errorf("want virtual memory %d, have %d", want, have)
   133  	}
   134  }
   135  
   136  func TestProcStatResidentMemory(t *testing.T) {
   137  	s, err := testProcStat(26231)
   138  	if err != nil {
   139  		t.Fatal(err)
   140  	}
   141  
   142  	if want, have := 1981*os.Getpagesize(), s.ResidentMemory(); want != have {
   143  		t.Errorf("want resident memory %d, have %d", want, have)
   144  	}
   145  }
   146  
   147  func TestProcStatStartTime(t *testing.T) {
   148  	s, err := testProcStat(26231)
   149  	if err != nil {
   150  		t.Fatal(err)
   151  	}
   152  
   153  	time, err := s.StartTime()
   154  	if err != nil {
   155  		t.Fatal(err)
   156  	}
   157  	if want, have := 1418184099.75, time; want != have {
   158  		t.Errorf("want start time %f, have %f", want, have)
   159  	}
   160  }
   161  
   162  func TestProcStatCPUTime(t *testing.T) {
   163  	s, err := testProcStat(26231)
   164  	if err != nil {
   165  		t.Fatal(err)
   166  	}
   167  
   168  	if want, have := 17.21, s.CPUTime(); want != have {
   169  		t.Errorf("want cpu time %f, have %f", want, have)
   170  	}
   171  }
   172  
   173  func testProcStat(pid int) (ProcStat, error) {
   174  	fs, err := NewFS(procTestFixtures)
   175  	if err != nil {
   176  		return ProcStat{}, err
   177  	}
   178  	p, err := fs.Proc(pid)
   179  	if err != nil {
   180  		return ProcStat{}, err
   181  	}
   182  
   183  	return p.Stat()
   184  }
   185
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