xeth: added address hex check and length check

xeth/xeth_test.go

@@ -0,0 +1,26 @@
+package xeth
+
+import "testing"
+
+func TestIsAddress(t *testing.T) {
+	for _, invalid := range []string{
+		"0x00",
+		"0xNN",
+		"0x00000000000000000000000000000000000000NN",
+		"0xAAar000000000000000000000000000000000000",
+	} {
+		if isAddress(invalid) {
+			t.Error("Expected", invalid, "to be invalid")
+		}
+	}
+
+	for _, valid := range []string{
+		"0x0000000000000000000000000000000000000000",
+		"0xAABBbbCCccff9900000000000000000000000000",
+		"AABBbbCCccff9900000000000000000000000000",
+	} {
+		if !isAddress(valid) {
+			t.Error("Expected", valid, "to be valid")
+		}
+	}
+}