1 files changed, 98 insertions, 0 deletions
diff --git a/internal/ratelimiter/ratelimiter_test.go b/internal/ratelimiter/ratelimiter_test.go
new file mode 100644
index 0000000..a6f618b
--- /dev/null
+++ b/internal/ratelimiter/ratelimiter_test.go
@@ -0,0 +1,98 @@
+package ratelimiter
+
+import (
+	"net"
+	"testing"
+	"time"
+)
+
+type RatelimiterResult struct {
+	allowed bool
+	text    string
+	wait    time.Duration
+}
+
+func TestRatelimiter(t *testing.T) {
+
+	var ratelimiter Ratelimiter
+	var expectedResults []RatelimiterResult
+
+	Nano := func(nano int64) time.Duration {
+		return time.Nanosecond * time.Duration(nano)
+	}
+
+	Add := func(res RatelimiterResult) {
+		expectedResults = append(
+			expectedResults,
+			res,
+		)
+	}
+
+	for i := 0; i < RatelimiterPacketsBurstable; i++ {
+		Add(RatelimiterResult{
+			allowed: true,
+			text:    "inital burst",
+		})
+	}
+
+	Add(RatelimiterResult{
+		allowed: false,
+		text:    "after burst",
+	})
+
+	Add(RatelimiterResult{
+		allowed: true,
+		wait:    Nano(time.Second.Nanoseconds() / RatelimiterPacketsPerSecond),
+		text:    "filling tokens for single packet",
+	})
+
+	Add(RatelimiterResult{
+		allowed: false,
+		text:    "not having refilled enough",
+	})
+
+	Add(RatelimiterResult{
+		allowed: true,
+		wait:    2 * Nano(time.Second.Nanoseconds()/RatelimiterPacketsPerSecond),
+		text:    "filling tokens for two packet burst",
+	})
+
+	Add(RatelimiterResult{
+		allowed: true,
+		text:    "second packet in 2 packet burst",
+	})
+
+	Add(RatelimiterResult{
+		allowed: false,
+		text:    "packet following 2 packet burst",
+	})
+
+	ips := []net.IP{
+		net.ParseIP("127.0.0.1"),
+		net.ParseIP("192.168.1.1"),
+		net.ParseIP("172.167.2.3"),
+		net.ParseIP("97.231.252.215"),
+		net.ParseIP("248.97.91.167"),
+		net.ParseIP("188.208.233.47"),
+		net.ParseIP("104.2.183.179"),
+		net.ParseIP("72.129.46.120"),
+		net.ParseIP("2001:0db8:0a0b:12f0:0000:0000:0000:0001"),
+		net.ParseIP("f5c2:818f:c052:655a:9860:b136:6894:25f0"),
+		net.ParseIP("b2d7:15ab:48a7:b07c:a541:f144:a9fe:54fc"),
+		net.ParseIP("a47b:786e:1671:a22b:d6f9:4ab0:abc7:c918"),
+		net.ParseIP("ea1e:d155:7f7a:98fb:2bf5:9483:80f6:5445"),
+		net.ParseIP("3f0e:54a2:f5b4:cd19:a21d:58e1:3746:84c4"),
+	}
+
+	ratelimiter.Init()
+
+	for i, res := range expectedResults {
+		time.Sleep(res.wait)
+		for _, ip := range ips {
+			allowed := ratelimiter.Allow(ip)
+			if allowed != res.allowed {
+				t.Fatal("Test failed for", ip.String(), ", on:", i, "(", res.text, ")", "expected:", res.allowed, "got:", allowed)
+			}
+		}
+	}
+}