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// Copyright 2016 CoreOS, 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 daemon
import (
"os"
"strconv"
"testing"
"time"
)
func must(err error) {
if err != nil {
panic(err)
}
}
func TestSdWatchdogEnabled(t *testing.T) {
mypid := strconv.Itoa(os.Getpid())
tests := []struct {
usec string // empty => unset
pid string // empty => unset
unsetEnv bool // arbitrarily set across testcases
werr bool
wdelay time.Duration
}{
// Success cases
{"100", mypid, true, false, 100 * time.Microsecond},
{"50", mypid, true, false, 50 * time.Microsecond},
{"1", mypid, false, false, 1 * time.Microsecond},
{"1", "", true, false, 1 * time.Microsecond},
// No-op cases
{"", mypid, true, false, 0}, // WATCHDOG_USEC not set
{"1", "0", false, false, 0}, // WATCHDOG_PID doesn't match
{"", "", true, false, 0}, // Both not set
// Failure cases
{"-1", mypid, true, true, 0}, // Negative USEC
{"string", "1", false, true, 0}, // Non-integer USEC value
{"1", "string", true, true, 0}, // Non-integer PID value
{"stringa", "stringb", false, true, 0}, // E v e r y t h i n g
{"-10239", "-eleventythree", true, true, 0}, // i s w r o n g
}
for i, tt := range tests {
if tt.usec != "" {
must(os.Setenv("WATCHDOG_USEC", tt.usec))
} else {
must(os.Unsetenv("WATCHDOG_USEC"))
}
if tt.pid != "" {
must(os.Setenv("WATCHDOG_PID", tt.pid))
} else {
must(os.Unsetenv("WATCHDOG_PID"))
}
delay, err := SdWatchdogEnabled(tt.unsetEnv)
if tt.werr && err == nil {
t.Errorf("#%d: want non-nil err, got nil", i)
} else if !tt.werr && err != nil {
t.Errorf("#%d: want nil err, got %v", i, err)
}
if tt.wdelay != delay {
t.Errorf("#%d: want delay=%d, got %d", i, tt.wdelay, delay)
}
if tt.unsetEnv && (os.Getenv("WATCHDOG_PID") != "" || os.Getenv("WATCHDOG_USEC") != "") {
t.Errorf("#%d: environment variables not cleaned up", i)
}
}
}
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