ScalaTest

   依赖

<!--依赖-->
<dependencies>
    <dependency>
        <groupId>org.scalatest</groupId>
        <artifactId>scalatest_2.11</artifactId>
        <version>3.0.0</version>
        <scope>test</scope>
    </dependency>
</dependencies>

代码

package zhangxiaofan.object_static

import org.scalatest.FunSuite

/**
  * @author ZhangXiaoFan
  * @create 2020-10-18 23:48
  */
class UserTest extends FunSuite {

    //差集
    test("Test difference") {
        val a = Set("a", "b", "a", "c")
        val b = Set("b", "d")
        assert(a -- b === Set("a", "c"))
        println("Test difference")
    }

    //交集
    test("Test intersection") {
        val a = Set("a", "b", "a", "c")
        val b = Set("b", "d")
        assert(a.intersect(b) === Set("b"))
    }

    //并集
    test("Test union") {
        val a = Set("a", "b", "a", "c")
        val b = Set("b", "d")
        assert(a ++ b === Set("a", "b", "c", "d"))
    }
}