AssertJ

import com.tangcheng.learning.test.assertj.AssertJEmployee;
import com.tangcheng.learning.test.assertj.AssertJPerson;
import com.tangcheng.learning.test.assertj.AssertJRing;
import com.tangcheng.learning.test.assertj.Magical;
import lombok.extern.slf4j.Slf4j;
import org.joda.time.LocalDate;
import org.joda.time.LocalDateTime;
import org.junit.Test;import java.util.Collections;
import java.util.Date;
import java.util.HashMap;import static com.google.common.collect.Maps.newHashMap;
import static org.assertj.core.api.Assertions.*;
import static org.assertj.core.util.DateUtil.parse;
import static org.assertj.core.util.DateUtil.parseDatetimeWithMs;
import static org.assertj.core.util.Lists.newArrayList;/**
* https://github.com/joel-costigliola/assertj-core
* https://github.com/joel-costigliola/assertj-core.git
* https://github.com/joel-costigliola/assertj-examples
* https://github.com/joel-costigliola/assertj-examples.git
*
* @author tangcheng
* 2017/11/30
*/
@Slf4j
public class AssertjTest { @Test
public void testString() {
String str = null;
assertThat(str).isNullOrEmpty();
str = "";
assertThat(str).isEmpty();
str = "Frodo";
assertThat(str).isEqualTo("Frodo").isEqualToIgnoringCase("frodo");
assertThat(str).startsWith("Fro").endsWith("do").hasSize(5);
assertThat(str).contains("ro").doesNotContain("or");
assertThat(str).containsOnlyOnce("odo");
assertThat(str).matches("..o.o").doesNotContain(".*d");
} @Test
public void TestNumber() {
Integer num = null;
assertThat(num).isNull();
num = 42;
assertThat(num).isEqualTo(42);
assertThat(num).isGreaterThan(38).isGreaterThanOrEqualTo(39);
assertThat(num).isLessThan(58).isLessThanOrEqualTo(50);
assertThat(num).isNotZero();
assertThat(0).isZero();
assertThat(num).isPositive().isNotNegative();
assertThat(-1).isNegative().isNotPositive();
} @Test
public void testDate() {
assertThat(parse("2017-11-30"))
.isEqualTo("2017-11-30")
.isNotEqualTo("2017-11-29")
.isAfter("2017-11-28")
.isBefore(parse("2017-12-1")); assertThat(LocalDate.now().toDate())
.isBefore(LocalDate.now().plusYears(1).toDate())
.isAfter(LocalDate.now().minusYears(1).toDate()); assertThat(parse("2017-11-30"))
.isBetween("2017-11-1", "2017-12-1")
.isNotBetween(parse("2017-12-1"), parse("2018-12-1")); assertThat(LocalDateTime.now().toDate())
.isCloseTo(LocalDateTime.now().plusMillis(100).toDate(), 100)
.isCloseTo(LocalDateTime.now().plusMillis(100).toDate(), 200)
.isCloseTo(LocalDateTime.now().minusMillis(100).toDate(), 100)
.isCloseTo(LocalDateTime.now().minusMillis(100).toDate(), 500); Date actual = parseDatetimeWithMs("2017-11-30T01:00:00.000"); Date date2 = parseDatetimeWithMs("2017-11-30T01:00:00.555");
assertThat(actual).isEqualToIgnoringMillis(date2);
assertThat(actual).isInSameSecondAs(date2); Date date3 = parseDatetimeWithMs("2017-11-30T01:00:55.555");
assertThat(actual).isEqualToIgnoringSeconds(date3);
assertThat(actual).isInSameMinuteAs(date3); Date date4 = parseDatetimeWithMs("2017-11-30T01:55:55.555");
assertThat(actual).isEqualToIgnoringMinutes(date4);
assertThat(actual).isInSameHourAs(date4); Date date5 = parseDatetimeWithMs("2017-11-30T05:55:55.555");
assertThat(actual).isEqualToIgnoringHours(date5);
assertThat(actual).isInSameDayAs(date5);
} @Test
public void testList() {
assertThat(Collections.EMPTY_LIST).isEmpty();
assertThat(newArrayList()).isEmpty();
assertThat(newArrayList(1, 2, 3)).startsWith(1).endsWith(3);
assertThat(newArrayList(1, 2, 3)).contains(1, atIndex(0))
.contains(2, atIndex(1))
.contains(3, atIndex(2))
.isSorted();
assertThat(newArrayList(3, 1, 2)).isSubsetOf(newArrayList(1, 2, 3, 4));
assertThat(newArrayList("a", "b", "c")).containsOnlyOnce("a");
} @Test
public void testMap() {
HashMap<String, Object> foo = newHashMap();
foo.put("A", 1);
foo.put("B", 2);
foo.put("C", 3); assertThat(foo).isNotEmpty().hasSize(3);
assertThat(foo).contains(entry("A", 1), entry("B", 2));
assertThat(foo).containsKeys("A", "C");
assertThat(foo).containsValues(3, 1);
} @Test
public void testClass() {
assertThat(Magical.class).isAnnotation();
assertThat(AssertJRing.class).isNotAnnotation();
assertThat(AssertJRing.class).hasAnnotation(Magical.class);
assertThat(AssertJRing.class).isNotInterface();
assertThat("string").isInstanceOf(String.class);
assertThat(AssertJPerson.class).isAssignableFrom(AssertJEmployee.class);
} @Test
public void testFail() {
/**
*除此之外，还提供包括Exception、Iterable、JodaTime、Guava等等很多的断言支持。
*/
try {
fail("在不检查任何条件的情况下使断言失败。显示一则消息");
} catch (AssertionError e) {
log.warn("可以通过catch捕获该Error");
} try {
failBecauseExceptionWasNotThrown(IllegalArgumentException.class);
} catch (AssertionError e) {
log.warn("可以通过catch捕获该Error");
}
}}

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;/**
* @author tangcheng
* 2017/11/30
*/
@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
public @interface Magical {
}

/**
* @author tangcheng
* 2017/11/30
*/
@Magical
public enum AssertJRing {
oneRing,
vilya,
nenya,
narya,
dwarfRing,
manRing;
}

/**
* @author tangcheng
* 2017/11/30
*/
public class AssertJPerson {
}

/**
* @author tangcheng
* 2017/11/30
*/
public class AssertJEmployee extends AssertJPerson {
}