test: add horizontal mirror global test

src/klotski_core/raw_code/mirror.cc

@@ -101,6 +101,6 @@ bool RawCode::vertical_mirror_check(uint64_t raw_code) {
 
 bool RawCode::horizontal_mirror_check(uint64_t raw_code) {
     horizontal_fill(raw_code);
-    return ((raw_code ^ (raw_code >> 9)) & MASK_MIRROR_A)
-        && ((raw_code ^ (raw_code >> 3)) & MASK_MIRROR_B);
+    return ((MASK_MIRROR_A & ((raw_code >> 9) ^ raw_code)) == 0)
+        && ((MASK_MIRROR_B & ((raw_code >> 3) ^ raw_code)) == 0);
 }

src/klotski_core/raw_code/raw_code.cc

@@ -28,6 +28,10 @@ namespace klotski {
         return this->code == raw_code.code;
     }
 
+    bool RawCode::operator!=(const RawCode &raw_code) const {
+        return this->code != raw_code.code;
+    }
+
     std::ostream& operator<<(std::ostream &out, const RawCode &self) {
         char code[16];
         char dump_map[] = {

src/klotski_core/raw_code/raw_code.h

@@ -74,6 +74,7 @@ namespace klotski {
         /// Operators of RawCode
         bool operator==(uint64_t raw_code) const;
         bool operator==(const RawCode &raw_code) const;
+        bool operator!=(const RawCode &raw_code) const;
         constexpr explicit operator uint64_t() const { return code; }
         friend std::ostream& operator<<(std::ostream &out, const RawCode &self);
 

test/codec/raw_code.cc

@@ -70,3 +70,51 @@ TEST(RawCode, initializate) {
     EXPECT_EQ(RawCode::from_common_code(common_code_string).unwrap(), TEST_CODE); // l-value
     EXPECT_EQ(RawCode::from_common_code(common_code.to_string()).unwrap(), TEST_CODE); // r-value
 }
+
+TEST(RawCode, horizontal_mirror) {
+    auto raw_code_1 = RawCode::from_common_code(0x1A9BF0C00);
+    auto raw_code_2 = RawCode::from_common_code(0x4FEA13400);
+    auto raw_code_2_ = RawCode::from_common_code(0x6BFA47000);
+
+    EXPECT_EQ(raw_code_1.is_horizontal_mirror(), true);
+    EXPECT_EQ(raw_code_1.to_horizontal_mirror(), raw_code_1);
+    EXPECT_EQ(raw_code_1.is_horizontal_mirror(raw_code_1), true); // l-value
+    EXPECT_EQ(raw_code_1.is_horizontal_mirror(raw_code_2), false); // l-value
+    EXPECT_EQ(raw_code_1.is_horizontal_mirror(static_cast<RawCode&&>(raw_code_1)), true); // r-value
+    EXPECT_EQ(raw_code_1.is_horizontal_mirror(static_cast<RawCode&&>(raw_code_2)), false); // r-value
+
+    EXPECT_EQ(raw_code_2.is_horizontal_mirror(), false);
+    EXPECT_EQ(raw_code_2.to_horizontal_mirror(), raw_code_2_);
+    EXPECT_EQ(raw_code_2.is_horizontal_mirror(raw_code_1), false); // l-value
+    EXPECT_EQ(raw_code_2.is_horizontal_mirror(raw_code_2_), true); // l-value
+    EXPECT_EQ(raw_code_2.is_horizontal_mirror(static_cast<RawCode&&>(raw_code_1)), false); // r-value
+    EXPECT_EQ(raw_code_2.is_horizontal_mirror(static_cast<RawCode&&>(raw_code_2_)), true); // r-value
+}
+
+TEST(RawCode, horizontal_mirror_global) {
+    std::thread threads[16];
+    auto test = [](uint64_t head) {
+        for (const auto &range : AllCases::fetch()[head]) {
+            /// generate code and mirror layout
+            auto common_code = CommonCode::unsafe_create(head << 32 | range);
+            auto raw_code = common_code.to_raw_code();
+            auto raw_code_mirror = raw_code.to_horizontal_mirror();
+
+            /// verify horizontal mirror
+            EXPECT_EQ(raw_code_mirror.valid(), true);
+            EXPECT_EQ(raw_code_mirror.to_common_code().to_raw_code(), raw_code_mirror);
+            if (raw_code.is_horizontal_mirror()) {
+                EXPECT_EQ(raw_code, raw_code_mirror);
+            } else {
+                EXPECT_NE(raw_code, raw_code_mirror);
+            }
+            EXPECT_EQ(raw_code_mirror.to_horizontal_mirror(), raw_code);
+        }
+    };
+    for (uint64_t head = 0; head < 16; ++head) { // split into 16 threads
+        threads[head] = std::thread(test, head);
+    }
+    for (auto &t : threads) {
+        t.join();
+    }
+}