Fix Proc.Limits limit name matching (#667)

I was working on improving this algorithm to reduce the number of
allocations when I found out that with the addition of the additional
test cases, `Max processes` was failing to match the `switch`
statement as for some reason the limit name has a trailing
whitespace. By trimming the spaces it now matches all cases.

Signed-off-by: Leandro López (inkel) <[email protected]>

Author: inkel

proc_limits.go

@@ -19,6 +19,7 @@ import (
 	"os"
 	"regexp"
 	"strconv"
+	"strings"
 )
 
 // ProcLimits represents the soft limits for each of the process's resource
@@ -106,7 +107,7 @@ func (p Proc) Limits() (ProcLimits, error) {
 			return ProcLimits{}, fmt.Errorf("%w: couldn't parse %q line %q", ErrFileParse, f.Name(), s.Text())
 		}
 
-		switch fields[1] {
+		switch strings.TrimSpace(fields[1]) {
 		case "Max cpu time":
 			l.CPUTime, err = parseUint(fields[2])
 		case "Max file size":

proc_limits_test.go

@@ -32,10 +32,21 @@ func TestLimits(t *testing.T) {
 		have uint64
 	}{
 		{name: "cpu time", want: 18446744073709551615, have: l.CPUTime},
+		{name: "file size", want: 18446744073709551615, have: l.FileSize},
+		{name: "data size", want: 18446744073709551615, have: l.DataSize},
+		{name: "stack size", want: 8388608, have: l.StackSize},
+		{name: "core file size", want: 0, have: l.CoreFileSize},
+		{name: "resident set", want: 18446744073709551615, have: l.ResidentSet},
+		{name: "processes", want: 62898, have: l.Processes},
 		{name: "open files", want: 2048, have: l.OpenFiles},
+		{name: "locked memory", want: 18446744073708503040, have: l.LockedMemory},
+		{name: "address space", want: 8589934592, have: l.AddressSpace},
+		{name: "file locks", want: 18446744073709551615, have: l.FileLocks},
+		{name: "pending signals", want: 62898, have: l.PendingSignals},
 		{name: "msgqueue size", want: 819200, have: l.MsqqueueSize},
 		{name: "nice priority", want: 0, have: l.NicePriority},
-		{name: "address space", want: 8589934592, have: l.AddressSpace},
+		{name: "realtime priority", want: 0, have: l.RealtimePriority},
+		{name: "realtime timeout", want: 18446744073709551615, have: l.RealtimeTimeout},
 	} {
 		if test.want != test.have {
 			t.Errorf("want %s %d, have %d", test.name, test.want, test.have)