编辑“︁C++ GoogleTest”︁（章节）

== 实际应用案例 ==
=== 数学库测试 ===
验证矩阵运算库的正确性：
<syntaxhighlight lang="cpp">
TEST(MatrixTest, Multiplication) {
    Matrix a = {{1, 2}, {3, 4}};
    Matrix b = {{5, 6}, {7, 8}};
    Matrix expected = {{19, 22}, {43, 50}};
    
    Matrix result = Multiply(a, b);
    
    for (int i = 0; i < 2; ++i) {
        for (int j = 0; j < 2; ++j) {
            EXPECT_NEAR(result[i][j], expected[i][j], 1e-5);
        }
    }
}
</syntaxhighlight>

=== 网络协议测试 ===
验证协议解析器：
<syntaxhighlight lang="cpp">
TEST(ProtocolTest, ParsesValidPacket) {
    Packet p = ParsePacket("\x01\x02\x03\x04");
    EXPECT_EQ(p.header, 0x01);
    EXPECT_EQ(p.length, 0x02);
    EXPECT_EQ(p.type, 0x03);
    EXPECT_EQ(p.checksum, 0x04);
}

TEST(ProtocolTest, ThrowsOnShortPacket) {
    EXPECT_THROW(ParsePacket("\x01\x02"), InvalidPacketError);
}
</syntaxhighlight>