JUnit-単体テスト（自分の勉強のノート）-优快云博客

本文详细介绍了JUnit框架中的断言方法及Hamcrest匹配器的使用技巧，包括各种assertThat示例，如字符串、数值比较等，并概述了JUnit4中的注解功能。

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assert 判断/断言

implement 执行/实现

expected 期望

actual 实际

keeps the bar green, to keep the code clean;

hamcrest 断言(貼り付け　マさん)

1. assertThat

2. 使用hamcrest的匹配方法

a) 更自然

3. 示例

a) assertThat( n, allOf( greaterThan(1), lessThan(15) ) );
assertThat( n, anyOf( greaterThan(16), lessThan(8) ) );
assertThat( n, anything() );
assertThat( str, is( "innovation" ) );
assertThat( str, not( "innovation" ) );

b) assertThat( str, containsString( "innovation" ) );
assertThat( str, endsWith("innovation" ) );
assertThat( str, startsWith( "innovation" ) );
assertThat( n, equalTo( nExpected ) );
assertThat( str, equalToIgnoringCase( "innovation" ) );
assertThat( str, equalToIgnoringWhiteSpace( "innovation" ) );

c) assertThat( d, closeTo( 3.0, 0.3 ) );
assertThat( d, greaterThan(3.0) );
assertThat( d, lessThan (10.0) );
assertThat( d, greaterThanOrEqualTo (5.0) );
assertThat( d, lessThanOrEqualTo (16.0) );

d) assertThat( map, hasEntry( "innovation", "innovation" ) );
assertThat( iterable, hasItem ( "innovation" ) );
assertThat( map, hasKey ( "innovation" ) );
assertThat( map, hasValue ( "innovation" ) );