BAEL-3335 example of reading request multiple times. removed spring boot and using spring-webmvc

core-java-modules/core-java-datetime/README.md

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+=========
+
+## Core Java 8 Cookbooks and Examples
+
+### Relevant Articles: 
+- [Set the Time Zone of a Date in Java](https://www.baeldung.com/java-set-date-time-zone)
+- [Overriding System Time for Testing in Java](https://www.baeldung.com/java-override-system-time)

core-java-modules/core-java-datetime/pom.xml

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+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>core-java-datetime</artifactId>
+    <version>0.1.0-SNAPSHOT</version>
+    <name>core-java-datetime</name>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-java</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../parent-java</relativePath>
+    </parent>
+
+    <dependencies>
+        <!-- test scoped -->
+        <dependency>
+            <groupId>org.assertj</groupId>
+            <artifactId>assertj-core</artifactId>
+            <version>${assertj.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>joda-time</groupId>
+            <artifactId>joda-time</artifactId>
+            <version>${joda.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.powermock</groupId>
+            <artifactId>powermock-module-junit4</artifactId>
+            <version>${powermock.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.powermock</groupId>
+            <artifactId>powermock-api-mockito2</artifactId>
+            <version>${powermock.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.jmockit</groupId>
+            <artifactId>jmockit</artifactId>
+            <version>${jmockit.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <finalName>core-java-datetime</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+
+        <plugins>
+            <plugin>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>${maven-surefire-plugin.version}</version>
+                <configuration>
+                    <argLine>
+                        -javaagent:${settings.localRepository}/org/jmockit/jmockit/${jmockit.version}/jmockit-${jmockit.version}.jar
+                    </argLine>
+                    <disableXmlReport>true</disableXmlReport>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <!-- util -->
+        <joda.version>2.10</joda.version>
+        <!-- testing -->
+        <assertj.version>3.6.1</assertj.version>
+        <powermock.version>2.0.0-RC.4</powermock.version>
+        <jmockit.version>1.44</jmockit.version>
+        <!-- plugins -->
+        <maven-surefire-plugin.version>2.22.1</maven-surefire-plugin.version>
+    </properties>
+</project>

core-java-modules/core-java-datetime/src/main/resources/logback.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

core-java-modules/core-java-datetime/src/test/java/com/baeldung/time/InstantUnitTest.java

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+package com.baeldung.time;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.powermock.core.classloader.annotations.PrepareForTest;
+import org.powermock.modules.junit4.PowerMockRunner;
+
+import java.time.Clock;
+import java.time.Instant;
+import java.time.ZoneId;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.when;
+import static org.powermock.api.mockito.PowerMockito.mockStatic;
+
+@RunWith(PowerMockRunner.class)
+@PrepareForTest({ Instant.class })
+public class InstantUnitTest {
+
+    @Test
+    public void givenInstantMock_whenNow_thenGetFixedInstant() {
+        String instantExpected = "2014-12-22T10:15:30Z";
+        Clock clock = Clock.fixed(Instant.parse(instantExpected), ZoneId.of("UTC"));
+        Instant instant = Instant.now(clock);
+        mockStatic(Instant.class);
+        when(Instant.now()).thenReturn(instant);
+
+        Instant now = Instant.now();
+
+        assertThat(now.toString()).isEqualTo(instantExpected);
+    }
+
+    @Test
+    public void givenFixedClock_whenNow_thenGetFixedInstant() {
+        String instantExpected = "2014-12-22T10:15:30Z";
+        Clock clock = Clock.fixed(Instant.parse(instantExpected), ZoneId.of("UTC"));
+
+        Instant instant = Instant.now(clock);
+
+        assertThat(instant.toString()).isEqualTo(instantExpected);
+    }
+}

core-java-modules/core-java-datetime/src/test/java/com/baeldung/time/InstantWithJMockUnitTest.java

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+package com.baeldung.time;
+
+import mockit.Expectations;
+import mockit.Mock;
+import mockit.MockUp;
+import org.junit.jupiter.api.Test;
+
+import java.time.Clock;
+import java.time.Instant;
+import java.time.ZoneId;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class InstantWithJMockUnitTest {
+
+    @Test
+    public void givenInstantWithJMock_whenNow_thenGetFixedInstant() {
+        String instantExpected = "2014-12-21T10:15:30Z";
+        Clock clock = Clock.fixed(Instant.parse(instantExpected), ZoneId.of("UTC"));
+        new MockUp<Instant>() {
+            @Mock
+            public Instant now() {
+                return Instant.now(clock);
+            }
+        };
+
+        Instant now = Instant.now();
+
+        assertThat(now.toString()).isEqualTo(instantExpected);
+    }
+
+    @Test
+    public void givenInstantWithExpectations_whenNow_thenGetFixedInstant() {
+        Clock clock = Clock.fixed(Instant.parse("2014-12-23T10:15:30.00Z"), ZoneId.of("UTC"));
+        Instant instantExpected = Instant.now(clock);
+        new Expectations(Instant.class) {
+            {
+                Instant.now();
+                result = instantExpected;
+            }
+        };
+
+        Instant now = Instant.now();
+
+        assertThat(now).isEqualTo(instantExpected);
+    }
+}

core-java-modules/core-java-datetime/src/test/java/com/baeldung/time/LocalDateTimeUnitTest.java

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+package com.baeldung.time;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.powermock.core.classloader.annotations.PrepareForTest;
+import org.powermock.modules.junit4.PowerMockRunner;
+
+import java.time.Clock;
+import java.time.Instant;
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.mockito.Mockito.when;
+import static org.powermock.api.mockito.PowerMockito.mockStatic;
+
+@RunWith(PowerMockRunner.class)
+@PrepareForTest({ LocalDateTime.class })
+public class LocalDateTimeUnitTest {
+
+    @Test
+    public void givenLocalDateTimeMock_whenNow_thenGetFixedLocalDateTime() {
+        Clock clock = Clock.fixed(Instant.parse("2014-12-22T10:15:30.00Z"), ZoneId.of("UTC"));
+        LocalDateTime dateTime = LocalDateTime.now(clock);
+        mockStatic(LocalDateTime.class);
+        when(LocalDateTime.now()).thenReturn(dateTime);
+        String dateTimeExpected = "2014-12-22T10:15:30";
+
+        LocalDateTime now = LocalDateTime.now();
+
+        assertThat(now).isEqualTo(dateTimeExpected);
+    }
+
+    @Test
+    public void givenFixedClock_whenNow_thenGetFixedLocalDateTime() {
+        Clock clock = Clock.fixed(Instant.parse("2014-12-22T10:15:30.00Z"), ZoneId.of("UTC"));
+        String dateTimeExpected = "2014-12-22T10:15:30";
+
+        LocalDateTime dateTime = LocalDateTime.now(clock);
+
+        assertThat(dateTime).isEqualTo(dateTimeExpected);
+    }
+}

core-java-modules/core-java-datetime/src/test/java/com/baeldung/time/LocalDateTimeWithJMockUnitTest.java

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+package com.baeldung.time;
+
+import mockit.Expectations;
+import mockit.Mock;
+import mockit.MockUp;
+import org.junit.jupiter.api.Test;
+
+import java.time.Clock;
+import java.time.Instant;
+import java.time.LocalDateTime;
+import java.time.ZoneId;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+public class LocalDateTimeWithJMockUnitTest {
+
+    @Test
+    public void givenLocalDateTimeWithJMock_whenNow_thenGetFixedLocalDateTime() {
+        Clock clock = Clock.fixed(Instant.parse("2014-12-21T10:15:30.00Z"), ZoneId.of("UTC"));
+        new MockUp<LocalDateTime>() {
+            @Mock
+            public LocalDateTime now() {
+                return LocalDateTime.now(clock);
+            }
+        };
+        String dateTimeExpected = "2014-12-21T10:15:30";
+
+        LocalDateTime now = LocalDateTime.now();
+
+        assertThat(now).isEqualTo(dateTimeExpected);
+    }
+
+    @Test
+    public void givenLocalDateTimeWithExpectations_whenNow_thenGetFixedLocalDateTime() {
+        Clock clock = Clock.fixed(Instant.parse("2014-12-23T10:15:30.00Z"), ZoneId.of("UTC"));
+        LocalDateTime dateTimeExpected = LocalDateTime.now(clock);
+        new Expectations(LocalDateTime.class) {
+            {
+                LocalDateTime.now();
+                result = dateTimeExpected;
+            }
+        };
+
+        LocalDateTime now = LocalDateTime.now();
+
+        assertThat(now).isEqualTo(dateTimeExpected);
+    }
+}