Basic Concepts
基本概念
When using Google Test, you start by writing assertions, which are statements that check whether a condition is true. An assertion's result can be success, nonfatal failure, or fatal failure. If a fatal failure occurs, it aborts the current function; otherwise the program continues normally.
当使用Google Test时，从编写测试条件是否为真断言的语句开始。一个断言的结果可以成功，非致命的失败和致命的失败。如果致命的失败发生了，测试将终止当前函数，否则程序将继续运行。
Tests use assertions to verify the tested code's behavior. If a test crashes or has a failed assertion, then it fails; otherwise it succeeds.
测试使用断言确保测试代码行为，如果测试crash了或者断言失败，测试将失败，否则测试成功。
A test case contains one or many tests. You should group your tests into test cases that reflect the structure of the tested code. When multiple tests in a test case need to share common objects and subroutines, you can put them into a test fixture class.
一个test case（测试案例）包含一个或多个测试。应该组合你的测试到反射出测试代码结构的测试案例中，当一个测试案例中有多个测试需要共享对象和子过程时，应该将它们放置在一个test fixture类中。
A test program can contain multiple test cases.
一个测试程序可以包含多个测试案例
We'll now explain how to write a test program, starting at the individual assertion level and building up to tests and test cases.
我们将描述如何编写测试程序，开始使用独立的断言条件和构建测试以及测试案例。