1 files changed, 73 insertions, 0 deletions
diff --git a/modules/sensors/dynamic_sensor/HidUtils/test/CopyBitsTest.cpp b/modules/sensors/dynamic_sensor/HidUtils/test/CopyBitsTest.cpp
new file mode 100644
index 00000000..1b1ca709
--- /dev/null
+++ b/modules/sensors/dynamic_sensor/HidUtils/test/CopyBitsTest.cpp
@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2021 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "HidUtils.h"
+#include <gtest/gtest.h>
+
+using HidUtil::copyBits;
+
+TEST(CopyBitsTest, CopyBits) {
+    const struct {
+        uint32_t src;
+        uint32_t dst;
+        int src_bit_offset;
+        int dst_bit_offset;
+        int bit_count;
+        uint32_t expected_dst;
+    } kTestVectorList[] = {
+        { 0x00000005, 0x00000000,  0,  0,  8, 0x00000005 },
+        { 0x00000005, 0x00000000,  0,  4,  8, 0x00000050 },
+        { 0x0000000C, 0x00000020,  0,  4,  8, 0x000000C0 },
+        { 0x00000005, 0x0000F02F,  0,  4,  8, 0x0000F05F },
+        { 0x12345678, 0x87654321,  5, 11, 17, 0x8D159B21 },
+        { 0x12345678, 0x87654321, 11,  5, 17, 0x8748D141 },
+    };
+
+    for (auto test_vector : kTestVectorList) {
+        uint32_t dst = test_vector.dst;
+        copyBits(&(test_vector.src), &dst, sizeof(dst),
+                 test_vector.src_bit_offset, test_vector.dst_bit_offset,
+                 test_vector.bit_count);
+        EXPECT_EQ(test_vector.expected_dst, dst);
+    }
+}
+
+TEST(CopyBitsTest, Overflow) {
+    const struct {
+        uint32_t src;
+        uint32_t dst;
+        unsigned int src_bit_offset;
+        unsigned int dst_bit_offset;
+        unsigned int bit_count;
+        uint32_t expected_dst;
+    } kTestVectorList[] = {
+        { 0x000000FF, 0x00000000,  0,        0,        8, 0x000000FF },
+        { 0x000000FF, 0x00000000,  0,       24,        8, 0xFF000000 },
+        { 0x000000FF, 0x00000000,  0,       25,        8, 0x00000000 },
+        { 0x000000FF, 0x00000000,  0,       32,        8, 0x00000000 },
+        { 0x000000FF, 0x00000000,  0, UINT_MAX,        8, 0x00000000 },
+        { 0x000000FF, 0x00000000,  0,        8, UINT_MAX, 0x00000000 },
+    };
+
+    for (auto test_vector : kTestVectorList) {
+        uint32_t dst = test_vector.dst;
+        copyBits(&(test_vector.src), &dst, sizeof(dst),
+                 test_vector.src_bit_offset, test_vector.dst_bit_offset,
+                 test_vector.bit_count);
+        EXPECT_EQ(test_vector.expected_dst, dst);
+    }
+}
+