Switch from Godep to go vendoring

vendor/github.com/jpillora/backoff/backoff_test.go

@@ -0,0 +1,81 @@
+package backoff
+
+import (
+	"testing"
+	"time"
+)
+
+func Test1(t *testing.T) {
+
+	b := &Backoff{
+		Min:    100 * time.Millisecond,
+		Max:    10 * time.Second,
+		Factor: 2,
+	}
+
+	equals(t, b.Duration(), 100*time.Millisecond)
+	equals(t, b.Duration(), 200*time.Millisecond)
+	equals(t, b.Duration(), 400*time.Millisecond)
+	b.Reset()
+	equals(t, b.Duration(), 100*time.Millisecond)
+}
+
+func Test2(t *testing.T) {
+
+	b := &Backoff{
+		Min:    100 * time.Millisecond,
+		Max:    10 * time.Second,
+		Factor: 1.5,
+	}
+
+	equals(t, b.Duration(), 100*time.Millisecond)
+	equals(t, b.Duration(), 150*time.Millisecond)
+	equals(t, b.Duration(), 225*time.Millisecond)
+	b.Reset()
+	equals(t, b.Duration(), 100*time.Millisecond)
+}
+
+func Test3(t *testing.T) {
+
+	b := &Backoff{
+		Min:    100 * time.Nanosecond,
+		Max:    10 * time.Second,
+		Factor: 1.75,
+	}
+
+	equals(t, b.Duration(), 100*time.Nanosecond)
+	equals(t, b.Duration(), 175*time.Nanosecond)
+	equals(t, b.Duration(), 306*time.Nanosecond)
+	b.Reset()
+	equals(t, b.Duration(), 100*time.Nanosecond)
+}
+
+func TestJitter(t *testing.T) {
+	b := &Backoff{
+		Min:    100 * time.Millisecond,
+		Max:    10 * time.Second,
+		Factor: 2,
+		Jitter: true,
+	}
+
+	equals(t, b.Duration(), 100*time.Millisecond)
+	between(t, b.Duration(), 100*time.Millisecond, 200*time.Millisecond)
+	between(t, b.Duration(), 100*time.Millisecond, 400*time.Millisecond)
+	b.Reset()
+	equals(t, b.Duration(), 100*time.Millisecond)
+}
+
+func between(t *testing.T, actual, low, high time.Duration) {
+	if actual < low {
+		t.Fatalf("Got %s, Expecting >= %s", actual, low)
+	}
+	if actual > high {
+		t.Fatalf("Got %s, Expecting <= %s", actual, high)
+	}
+}
+
+func equals(t *testing.T, d1, d2 time.Duration) {
+	if d1 != d2 {
+		t.Fatalf("Got %s, Expecting %s", d1, d2)
+	}
+}