50 lines
1.1 KiB
Go
50 lines
1.1 KiB
Go
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package mchk
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import (
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"errors"
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. "testing"
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"time"
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"github.com/mediocregopher/mediocre-go-lib/mrand"
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)
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func TestCheckerRun(t *T) {
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c := Checker{
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Init: func() State { return 0 },
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Next: func(State) Action {
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if mrand.Intn(3) == 0 {
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return Action{Params: -1}
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}
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return Action{Params: 1}
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},
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Apply: func(s State, a Action) (State, error) {
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si := s.(int) + a.Params.(int)
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if si > 5 {
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return nil, errors.New("went over 5")
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}
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return si, nil
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},
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MaxLength: 4,
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}
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// 4 Actions should never be able to go over 5
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if err := c.RunFor(time.Second); err != nil {
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t.Fatal(err)
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}
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// 20 should always go over 5 eventually
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c.MaxLength = 20
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err := c.RunFor(time.Second)
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if err == nil {
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t.Fatal("expected error when maxDepth is 20")
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} else if len(err.(RunErr).Params) < 6 {
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t.Fatalf("strange RunErr when maxDepth is 20: %s", err)
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}
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t.Logf("got expected error with large maxDepth:\n%s", err)
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caseErr := c.RunCase(err.(RunErr).Params...)
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if caseErr == nil || err.Error() != caseErr.Error() {
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t.Fatalf("unexpected caseErr: %v", caseErr)
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}
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}
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