测试覆盖率
(1)写一个程序,用于分析一个字符串中各个单词出现的频率,并将单词和它出现的频率输出显示。(单词之间用空格隔开,如“Hello World My First Unit Test”);
(2)编写单元测试进行测试;
(3)用ElcEmma查看代码覆盖率,要求覆盖达到100%。
代码
public class WordFreq {
private Map<String, Integer> wordsMap;
public WordFreq(String strWords) {
wordsMap = this.getArray(strWords);
}
public Map<String, Integer> getArray(String strWords) {
String[] words_Array = strWords.split(" ");
Map<String, Integer> words_Map = new HashMap<String, Integer>();
int arrlength = words_Array.length;
for (int i = 0; i < arrlength; i++) {
if (!words_Map.containsKey(words_Array[i])) {
words_Map.put(words_Array[i], 1);
} else {
}
}
return words_Map;
}
public void OutputResult() {
Set s = wordsMap.keySet();
Iterator i = s.iterator();
while (i.hasNext()) {
Object o = i.next();
System.out.println(o + "出现了" + wordsMap.get(o)+"次");
}
}
}
测试
import static org.junit.Assert.*;
import org.junit.Test;
public class WordFreqTest {
@Test
public void test() {
String strWords = "Hello World My First Unit Test";
WordFreq test = new WordFreq(strWords);
test.OutputResult();
}
}
结果
1、 学习单元测试代码覆盖率工具的使用
(1)把一个英语句子中的单词次序颠倒后输出。例如输入“how are you”,输出“you are how”;
(2)编写单元测试进行测试;
(3)用ElcEmma查看代码覆盖率,要求覆盖率达到100%。
import java.util.Scanner;
public class Demo{
public static void test(String str){
String[] strArr = str.split("\\s+|[,]");
StringBuffer result = new StringBuffer();
for(int i = strArr.length -1;i >=0; i--){
result.append(strArr[i] + " ");
}
result.setCharAt(str.length()-0, (char) 0);
System.out.println("颠倒顺序后的字符串:: "+result.toString());
}
}
测试类
import org.junit.After;
import org.junit.Test;
public class DemoTest {
@Test
public void test() throws Exception {
String str="how are you";
Demo.test(str);
}
}