TransferID class

2026-10-17 14:33:34 +08:00 · 2014-02-02 01:57:54 +04:00
parent 5252972d3e
commit 4bf2b2e81a
3 changed files with 113 additions and 24 deletions
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2014 Pavel Kirienko <pavel.kirienko@gmail.com>
+ */
+
+#include <string>
+#include <gtest/gtest.h>
+#include <uavcan/internal/transport/transfer.hpp>
+
+
+TEST(Transfer, TransferID)
+{
+    using uavcan::TransferID;
+
+    // Tests below are based on this assumption
+    ASSERT_EQ(16, 1 << TransferID::BITLEN);
+
+    /*
+     * forwardDistance()
+     */
+    EXPECT_EQ(0, TransferID(0).forwardDistance(0));
+    EXPECT_EQ(1, TransferID(0).forwardDistance(1));
+    EXPECT_EQ(15, TransferID(0).forwardDistance(15));
+
+    EXPECT_EQ(0, TransferID(7).forwardDistance(7));
+    EXPECT_EQ(15, TransferID(7).forwardDistance(6));
+    EXPECT_EQ(1, TransferID(7).forwardDistance(8));
+
+    EXPECT_EQ(9, TransferID(10).forwardDistance(3));
+    EXPECT_EQ(7, TransferID(3).forwardDistance(10));
+
+    EXPECT_EQ(8, TransferID(6).forwardDistance(14));
+    EXPECT_EQ(8, TransferID(14).forwardDistance(6));
+
+    EXPECT_EQ(1, TransferID(14).forwardDistance(15));
+    EXPECT_EQ(2, TransferID(14).forwardDistance(0));
+    EXPECT_EQ(4, TransferID(14).forwardDistance(2));
+
+    EXPECT_EQ(15, TransferID(15).forwardDistance(14));
+    EXPECT_EQ(14, TransferID(0).forwardDistance(14));
+    EXPECT_EQ(12, TransferID(2).forwardDistance(14));
+
+    /*
+     * Misc
+     */
+    EXPECT_TRUE(TransferID(2) == TransferID(2));
+    EXPECT_FALSE(TransferID(2) != TransferID(2));
+    EXPECT_FALSE(TransferID(2) == TransferID(8));
+    EXPECT_TRUE(TransferID(2) != TransferID(8));
+
+    TransferID tid;
+    for (int i = 0; i < 999; i++)
+    {
+        ASSERT_EQ(i & ((1 << TransferID::BITLEN) - 1), tid.get());
+        const TransferID copy = tid;
+        tid.increment();
+        ASSERT_EQ(1, copy.forwardDistance(tid));
+        ASSERT_EQ(15, tid.forwardDistance(copy));
+        ASSERT_EQ(0, tid.forwardDistance(tid));
+    }
+}