refactor-for-testability (#3)

Co-authored-by: jdl <jdl@desktop>
Co-authored-by: jdl <jdl@crumpington.com>
Reviewed-on: #3

peer/bitset_test.go

@@ -0,0 +1,48 @@
+package peer
+
+import (
+	"math/rand"
+	"testing"
+)
+
+func TestBitSet(t *testing.T) {
+	state := make([]bool, bitSetSize)
+	for i := range state {
+		state[i] = rand.Float32() > 0.5
+	}
+
+	bs := bitSet{}
+
+	for i := range state {
+		if state[i] {
+			bs.Set(i)
+		}
+	}
+
+	for i := range state {
+		if bs.Get(i) != state[i] {
+			t.Fatal(i, state[i], bs.Get(i))
+		}
+	}
+
+	for i := range state {
+		if rand.Float32() > 0.5 {
+			state[i] = false
+			bs.Clear(i)
+		}
+	}
+
+	for i := range state {
+		if bs.Get(i) != state[i] {
+			t.Fatal(i, state[i], bs.Get(i))
+		}
+	}
+
+	bs.ClearAll()
+
+	for i := range state {
+		if bs.Get(i) {
+			t.Fatal(i, bs.Get(i))
+		}
+	}
+}