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11.7.1. 按名称运行测试的子集
如果想要选择运行的测试，就将测试的名称（一个或多个）作为cargo test的参数。
看个例子：
pub fn add_two(a: usize) -> usize {a + 2
}#[cfg(test)]
mod tests {use super::*;#[test]fn add_two_and_two() {let result = add_two(2);assert_eq!(result, 4);}#[test]fn add_three_and_two() {let result = add_two(3);assert_eq!(result, 5);}#[test]fn one_hundred() {let result = add_two(100);assert_eq!(result, 102);}
}
这里有三个测试，假如我们只想要测试one_hundred这个参数，就这么写：cargo test onne_hundred:
$ cargo test one_hundredCompiling adder v0.1.0 (file:///projects/adder)Finished `test` profile [unoptimized + debuginfo] target(s) in 0.69sRunning unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)running 1 test
test tests::one_hundred ... oktest result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 2 filtered out; finished in 0.00s
运行单个测试直接指定测试名就可以。运行多个测试指定测试名的一部分（模块名也可以）作为参数，这样任何匹配这一名称的测试都会被执行。
举个例子，假如我想要执行add_two_and_two()和add_three_and_two，这两个测试的名称都含有add这个部分，就写:cargo test add:
$ cargo test addCompiling adder v0.1.0 (file:///projects/adder)Finished `test` profile [unoptimized + debuginfo] target(s) in 0.61sRunning unittests src/lib.rs (target/debug/deps/adder-92948b65e88960b4)running 2 tests
test tests::add_three_and_two ... ok
test tests::add_two_and_two ... oktest result: ok. 2 passed; 0 failed; 0 ignored; 0 measured; 1 filtered out; finished in 0.00s