add unit tests for Encoding::encode()

test/src/test_Encoding.cc

@@ -67,3 +67,33 @@ TEST(Encoding_decode, decodes_CP_1252_correctly)
 {
     EXPECT_EQ(0x99u, Encoding::decode(Encoding::CP_1252, (const uint8_t *)"\x99"));
 }
+
+
+TEST(Encoding_encode, encodes_UTF_8_correctly)
+{
+    struct
+    {
+        uint32_t code_point;
+        const char * expected;
+    } tests[] = {
+        {(uint32_t)'%', "%"},
+        {0x567u, "\xD5\xA7"},
+        {0x9876u, "\xE9\xA1\xB6"},
+        {0x12345u, "\xF0\x92\x8D\x85"},
+        {0x1234567u, "\xF9\x88\xB4\x95\xA7"},
+        {0x12345678u, "\xFC\x92\x8D\x85\x99\xB8"},
+    };
+    for (unsigned int i = 0; i < sizeof(tests) / sizeof(tests[0]); i++)
+    {
+        char buffer[10] = {0};
+        EXPECT_EQ(strlen(tests[i].expected), Encoding::encode(tests[i].code_point, Encoding::UTF_8, (uint8_t *)buffer));
+        EXPECT_EQ(std::string(tests[i].expected), buffer);
+    }
+}
+
+TEST(Encoding_encode, encodes_CP_1252_correctly)
+{
+    char buffer[10] = {0};
+    EXPECT_EQ(1, Encoding::encode(0x89u, Encoding::CP_1252, (uint8_t *)buffer));
+    EXPECT_EQ(std::string("\x89"), buffer);
+}