Add initial interop tests
diff --git a/tools/http2_interop/http2interop_test.go b/tools/http2_interop/http2interop_test.go
new file mode 100644
index 0000000..3b687c0
--- /dev/null
+++ b/tools/http2_interop/http2interop_test.go
@@ -0,0 +1,50 @@
+package http2interop
+
+import (
+	"crypto/tls"
+	"flag"
+	"io"
+	"os"
+	"testing"
+)
+
+var (
+	serverSpec = flag.String("spec", ":50051", "The server spec to test")
+)
+
+func TestShortPreface(t *testing.T) {
+	for i := 0; i < len(Preface)-1; i++ {
+		if err := testShortPreface(*serverSpec, Preface[:i]+"X"); err != io.EOF {
+			t.Error("Expected an EOF but was", err)
+		}
+	}
+}
+
+func TestUnknownFrameType(t *testing.T) {
+	if err := testUnknownFrameType(*serverSpec); err != nil {
+		t.Fatal(err)
+	}
+}
+
+func TestTLSApplicationProtocol(t *testing.T) {
+	if err := testTLSApplicationProtocol(*serverSpec); err != io.EOF {
+		t.Fatal("Expected an EOF but was", err)
+	}
+}
+
+func TestTLSMaxVersion(t *testing.T) {
+	if err := testTLSMaxVersion(*serverSpec, tls.VersionTLS11); err != io.EOF {
+		t.Fatal("Expected an EOF but was", err)
+	}
+}
+
+func TestClientPrefaceWithStreamId(t *testing.T) {
+	if err := testClientPrefaceWithStreamId(*serverSpec); err != io.EOF {
+		t.Fatal("Expected an EOF but was", err)
+	}
+}
+
+func TestMain(m *testing.M) {
+	flag.Parse()
+	os.Exit(m.Run())
+}