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@ -410,6 +410,35 @@ func TestMakeProbePlan(t *testing.T) {
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"region-5-v6": []probe{p("5a", 6), p("5b", 6, 100*ms), p("5c", 6, 200*ms)},
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},
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},
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{
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name: "try_harder_for_preferred_derp",
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dm: basicMap,
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have6if: true,
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last: &Report{
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RegionLatency: map[int]time.Duration{
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1: 10 * time.Millisecond,
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2: 20 * time.Millisecond,
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3: 30 * time.Millisecond,
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4: 40 * time.Millisecond,
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},
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RegionV4Latency: map[int]time.Duration{
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1: 10 * time.Millisecond,
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2: 20 * time.Millisecond,
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},
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RegionV6Latency: map[int]time.Duration{
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3: 30 * time.Millisecond,
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4: 40 * time.Millisecond,
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},
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PreferredDERP: 1,
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},
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want: probePlan{
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"region-1-v4": []probe{p("1a", 4), p("1a", 4, 12*ms), p("1a", 4, 124*ms), p("1a", 4, 186*ms)},
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"region-1-v6": []probe{p("1a", 6), p("1a", 6, 12*ms), p("1a", 6, 124*ms), p("1a", 6, 186*ms)},
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"region-2-v4": []probe{p("2a", 4), p("2b", 4, 24*ms)},
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"region-2-v6": []probe{p("2a", 6), p("2b", 6, 24*ms)},
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"region-3-v4": []probe{p("3a", 4)},
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},
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},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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