From 57ebc8011356a811af1541ca8135d0f279b2e177 Mon Sep 17 00:00:00 2001
From: Guide <koushuangbwcx@163.com>
Date: Thu, 20 Apr 2023 15:57:22 +0800
Subject: [PATCH] =?UTF-8?q?[docs=20update]=E7=BB=9F=E4=B8=80Java=E9=83=A8?=
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MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 README.md                                       |   2 +-
 docs/home.md                                    |   2 +-
 .../images/java7_concurrenthashmap.drawio       |   1 -
 .../images/java8_concurrenthashmap.drawio       |   1 -
 .../collection/images/jdk1.7_hashmap.drawio     |   1 -
 .../collection/images/jdk1.8_hashmap.drawio     |   1 -
 .../synchronized-get-lock-code-block.drawio     |   1 -
 .../synchronized-release-lock-block.drawio      |   1 -
 .../threadlocal-data-structure.drawio           |   1 -
 .../图解线程池实现原理.png             | Bin 4758 -> 0 bytes
 .../images/jmm/.$cpu-cache-protocol.drawio.bkp  |   1 -
 .../images/jmm/.$cpu-cache.drawio.bkp           |   1 -
 .../images/jmm/cpu-cache-protocol.drawio        |   1 -
 .../java/concurrent/images/jmm/cpu-cache.drawio |   1 -
 docs/java/concurrent/images/jmm/jmm.drawio      |   1 -
 docs/java/concurrent/images/jmm/jmm2.drawio     |   1 -
 .../1bc44c67-26ba-42ab-bcb8-4e29e6fd99b9.png    | Bin 8327 -> 0 bytes
 ...-accident-threadpool-sharing-deadlock.drawio |   1 -
 .../java/concurrent/java-thread-pool-summary.md |  14 +++-----------
 docs/system-design/basis/unit-test.md           |  16 +++++++++++++++-
 20 files changed, 20 insertions(+), 28 deletions(-)
 delete mode 100644 docs/java/collection/images/java7_concurrenthashmap.drawio
 delete mode 100644 docs/java/collection/images/java8_concurrenthashmap.drawio
 delete mode 100644 docs/java/collection/images/jdk1.7_hashmap.drawio
 delete mode 100644 docs/java/collection/images/jdk1.8_hashmap.drawio
 delete mode 100644 docs/java/concurrent/images/interview-questions/synchronized-get-lock-code-block.drawio
 delete mode 100644 docs/java/concurrent/images/interview-questions/synchronized-release-lock-block.drawio
 delete mode 100644 docs/java/concurrent/images/interview-questions/threadlocal-data-structure.drawio
 delete mode 100644 docs/java/concurrent/images/java-thread-pool-summary/图解线程池实现原理.png
 delete mode 100644 docs/java/concurrent/images/jmm/.$cpu-cache-protocol.drawio.bkp
 delete mode 100644 docs/java/concurrent/images/jmm/.$cpu-cache.drawio.bkp
 delete mode 100644 docs/java/concurrent/images/jmm/cpu-cache-protocol.drawio
 delete mode 100644 docs/java/concurrent/images/jmm/cpu-cache.drawio
 delete mode 100644 docs/java/concurrent/images/jmm/jmm.drawio
 delete mode 100644 docs/java/concurrent/images/jmm/jmm2.drawio
 delete mode 100644 docs/java/concurrent/images/thread-pool/1bc44c67-26ba-42ab-bcb8-4e29e6fd99b9.png
 delete mode 100644 docs/java/concurrent/images/thread-pool/production-accident-threadpool-sharing-deadlock.drawio

diff --git a/README.md b/README.md
index 9154fb18..2df66d2e 100755
--- a/README.md
+++ b/README.md
@@ -142,7 +142,7 @@ JVM 这部分内容主要参考 [JVM 虚拟机规范-Java8 ](https://docs.oracle
 **知识点/面试题总结** ：
 
 - [计算机网络常见知识点&面试题总结(上)](./docs/cs-basics/network/other-network-questions.md)
-- - [计算机网络常见知识点&面试题总结(下)](./docs/cs-basics/network/other-network-questions2.md)
+- [计算机网络常见知识点&面试题总结(下)](./docs/cs-basics/network/other-network-questions2.md)
 - [谢希仁老师的《计算机网络》内容总结（补充）](./docs/cs-basics/network/computer-network-xiexiren-summary.md)
 
 **重要知识点详解** ：
diff --git a/docs/home.md b/docs/home.md
index db1853e1..fbae8ef2 100644
--- a/docs/home.md
+++ b/docs/home.md
@@ -143,7 +143,7 @@ JVM 这部分内容主要参考 [JVM 虚拟机规范-Java8 ](https://docs.oracle
 **知识点/面试题总结** ：
 
 - [计算机网络常见知识点&面试题总结(上)](./cs-basics/network/other-network-questions.md)
-- - [计算机网络常见知识点&面试题总结(下)](./cs-basics/network/other-network-questions2.md)
+- [计算机网络常见知识点&面试题总结(下)](./cs-basics/network/other-network-questions2.md)
 - [谢希仁老师的《计算机网络》内容总结（补充）](./cs-basics/network/computer-network-xiexiren-summary.md)
 
 **重要知识点详解** ：
diff --git a/docs/java/collection/images/java7_concurrenthashmap.drawio b/docs/java/collection/images/java7_concurrenthashmap.drawio
deleted file mode 100644
index 1f892650..00000000
--- a/docs/java/collection/images/java7_concurrenthashmap.drawio
+++ /dev/null
@@ -1 +0,0 @@
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\ No newline at end of file
diff --git a/docs/java/collection/images/java8_concurrenthashmap.drawio b/docs/java/collection/images/java8_concurrenthashmap.drawio
deleted file mode 100644
index 70f4fcab..00000000
--- a/docs/java/collection/images/java8_concurrenthashmap.drawio
+++ /dev/null
@@ -1 +0,0 @@
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diff --git a/docs/java/collection/images/jdk1.7_hashmap.drawio b/docs/java/collection/images/jdk1.7_hashmap.drawio
deleted file mode 100644
index c1b68e4c..00000000
--- a/docs/java/collection/images/jdk1.7_hashmap.drawio
+++ /dev/null
@@ -1 +0,0 @@
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diff --git a/docs/java/collection/images/jdk1.8_hashmap.drawio b/docs/java/collection/images/jdk1.8_hashmap.drawio
deleted file mode 100644
index 69c0eb52..00000000
--- a/docs/java/collection/images/jdk1.8_hashmap.drawio
+++ /dev/null
@@ -1 +0,0 @@
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diff --git a/docs/java/concurrent/images/interview-questions/synchronized-get-lock-code-block.drawio b/docs/java/concurrent/images/interview-questions/synchronized-get-lock-code-block.drawio
deleted file mode 100644
index eebb1a94..00000000
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diff --git a/docs/java/concurrent/images/interview-questions/synchronized-release-lock-block.drawio b/docs/java/concurrent/images/interview-questions/synchronized-release-lock-block.drawio
deleted file mode 100644
index 82fd95a0..00000000
--- a/docs/java/concurrent/images/interview-questions/synchronized-release-lock-block.drawio
+++ /dev/null
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diff --git a/docs/java/concurrent/images/interview-questions/threadlocal-data-structure.drawio b/docs/java/concurrent/images/interview-questions/threadlocal-data-structure.drawio
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diff --git a/docs/java/concurrent/images/jmm/.$cpu-cache-protocol.drawio.bkp b/docs/java/concurrent/images/jmm/.$cpu-cache-protocol.drawio.bkp
deleted file mode 100644
index 010b100c..00000000
--- a/docs/java/concurrent/images/jmm/.$cpu-cache-protocol.drawio.bkp
+++ /dev/null
@@ -1 +0,0 @@
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diff --git a/docs/java/concurrent/images/jmm/.$cpu-cache.drawio.bkp b/docs/java/concurrent/images/jmm/.$cpu-cache.drawio.bkp
deleted file mode 100644
index f1cff183..00000000
--- a/docs/java/concurrent/images/jmm/.$cpu-cache.drawio.bkp
+++ /dev/null
@@ -1 +0,0 @@
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diff --git a/docs/java/concurrent/images/jmm/cpu-cache-protocol.drawio b/docs/java/concurrent/images/jmm/cpu-cache-protocol.drawio
deleted file mode 100644
index 39dfe1da..00000000
--- a/docs/java/concurrent/images/jmm/cpu-cache-protocol.drawio
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diff --git a/docs/java/concurrent/images/jmm/jmm.drawio b/docs/java/concurrent/images/jmm/jmm.drawio
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diff --git a/docs/java/concurrent/images/jmm/jmm2.drawio b/docs/java/concurrent/images/jmm/jmm2.drawio
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diff --git a/docs/java/concurrent/images/thread-pool/production-accident-threadpool-sharing-deadlock.drawio b/docs/java/concurrent/images/thread-pool/production-accident-threadpool-sharing-deadlock.drawio
deleted file mode 100644
index 3a2c775a..00000000
--- a/docs/java/concurrent/images/thread-pool/production-accident-threadpool-sharing-deadlock.drawio
+++ /dev/null
@@ -1 +0,0 @@
-<mxfile host="Electron" modified="2021-09-13T02:23:43.163Z" agent="5.0 (Macintosh; Intel Mac OS X 10_16_0) AppleWebKit/537.36 (KHTML, like Gecko) draw.io/13.4.5 Chrome/83.0.4103.122 Electron/9.1.0 Safari/537.36" etag="ZquFXXcWCCCaLHGcsSdS" version="13.4.5" type="device"><diagram id="2QZ9v8tFcnqdJ94wR8Zd" name="Page-1">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</diagram></mxfile>
\ No newline at end of file
diff --git a/docs/java/concurrent/java-thread-pool-summary.md b/docs/java/concurrent/java-thread-pool-summary.md
index 5c8e0d7d..d7c08333 100644
--- a/docs/java/concurrent/java-thread-pool-summary.md
+++ b/docs/java/concurrent/java-thread-pool-summary.md
@@ -21,14 +21,6 @@ tag:
 
 **线程池一般用于执行多个不相关联的耗时任务，没有多线程的情况下，任务顺序执行，使用了线程池的话可让多个不相关联的任务同时执行。**
 
-假设我们要执行三个不相关的耗时任务，画图给大家展示了使用线程池前后的区别。
-
-注意：**下面三个任务可能做的是同一件事情，也可能是不一样的事情。**
-
-> 使用多线程前应为：任务 1 --> 任务 2 --> 任务 3（图中把任务 3 画错为 任务 2）
-
-![使用线程池前后对比](./images/thread-pool/1bc44c67-26ba-42ab-bcb8-4e29e6fd99b9.png)
-
 ## Executor 框架介绍
 
 `Executor` 框架是 Java5 之后引进的，在 Java 5 之后，通过 `Executor` 来启动线程比使用 `Thread` 的 `start` 方法更好，除了更易管理，效率更好（用线程池实现，节约开销）外，还有关键的一点：有助于避免 this 逃逸问题。
@@ -408,9 +400,7 @@ pool-1-thread-2 End. Time = Sun Apr 12 11:14:47 CST 2020
 3. 如果向任务队列投放任务失败（任务队列已经满了），但是当前运行的线程数是小于最大线程数的，就新建一个线程来执行任务。
 4. 如果当前运行的线程数已经等同于最大线程数了，新建线程将会使当前运行的线程超出最大线程数，那么当前任务会被拒绝，饱和策略会调用`RejectedExecutionHandler.rejectedExecution()`方法。
 
-下图是我为了省事直接从网上找到，原地址不明。
-
-![图解线程池实现原理](https://oss.javaguide.cn/javaguide/%E5%9B%BE%E8%A7%A3%E7%BA%BF%E7%A8%8B%E6%B1%A0%E5%AE%9E%E7%8E%B0%E5%8E%9F%E7%90%86.png)
+![图解线程池实现原理](https://oss.javaguide.cn/github/javaguide/java/concurrent/thread-pool-principle.png)
 
 在 `execute` 方法中，多次调用 `addWorker` 方法。`addWorker` 这个方法主要用来创建新的工作线程，如果返回 true 说明创建和启动工作线程成功，否则的话返回的就是 false。
 
@@ -716,6 +706,7 @@ Exception in thread "main" java.util.concurrent.TimeoutException
 #### 执行任务过程介绍
 
 `SingleThreadExecutor` 的运行示意图（该图片来源：《Java 并发编程的艺术》）：
+
 ![SingleThreadExecutor的运行示意图](./images/java-thread-pool-summary/SingleThreadExecutor.png)
 
 **上图说明** :
@@ -760,6 +751,7 @@ Exception in thread "main" java.util.concurrent.TimeoutException
 #### 执行任务过程介绍
 
 `CachedThreadPool` 的 `execute()` 方法的执行示意图（该图片来源：《Java 并发编程的艺术》）：
+
 ![CachedThreadPool的execute()方法的执行示意图](./images/java-thread-pool-summary/CachedThreadPool-execute.png)
 
 **上图说明：**
diff --git a/docs/system-design/basis/unit-test.md b/docs/system-design/basis/unit-test.md
index d18b0538..281b5135 100644
--- a/docs/system-design/basis/unit-test.md
+++ b/docs/system-design/basis/unit-test.md
@@ -103,7 +103,21 @@ TDD 在很多人眼中是不实用的，一来他们并不理解测试“驱动
 3. 由于测试用例在未进行代码设计前写；很有可能限制开发者对代码整体设计；
 4. 可能引起开发人员不满情绪，我觉得这点很严重，毕竟不是人人都喜欢单元测试，尽管单元测试会带给我们相当多的好处。
 
-相关阅读：[如何用正确的姿势打开 TDD？ - 陈天 - 2017](https://zhuanlan.zhihu.com/p/24997923)  。
+相关阅读：[如何用正确的姿势打开 TDD？ - 陈天 - 2017](https://zhuanlan.zhihu.com/p/24997923) 。
+
+## 单测框架如何选择？
+
+对于单测来说，目前常用的单测框架有：JUnit、Mockito、Spock、PowerMock、JMockit、TestableMock 等等。
+
+JUnit 几乎是默认选择，但是其不支持 Mock，因此我们还需要选择一个 Mock 工具。Mockito 和 Spock 是最主流的两款 Mock 工具，一般都是在这两者中选择。
+
+究竟是选择 Mockito 还是 Spock 呢？我这里做了一些简单的对比分析：
+
+- Spock 没办法 Mock 静态方法和私有方法 ，Mockito 3.4.0 以后，支持静态方法的 Mock，具体可以看这个 issue：https://github.com/mockito/mockito/issues/1013，具体教程可以看这篇文章：https://www.baeldung.com/mockito-mock-static-methods。
+- Spock 基于 Groovy，写出来的测试代码更清晰易读，比较规范(自带 given-when-then 的常用测试结构规范)。Mockito 没有具体的结构规范，需要项目组自己约定一个或者遵守比较好的测试代码实践。通常来说，同样的测试用例，Spock 的代码要更简洁。
+- Mockito 使用的人群更广泛，稳定可靠。并且，Mockito 是 SpringBoot Test 默认集成的 Mock 工具。
+
+Mockito 和 Spock 都是非常不错的 Mock 工具，相对来说，Mockito 的适用性更强一些。
 
 ## 总结