Initial version of sample pact consumer and provider

.gitignore

@@ -0,0 +1,37 @@
+HELP.md
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/

build.gradle

@@ -0,0 +1,27 @@
+plugins {
+	id 'java'
+	id 'org.springframework.boot' version '3.0.0'
+	id 'io.spring.dependency-management' version '1.1.0'
+}
+
+group = 'de.rpr'
+version = '0.0.1-SNAPSHOT'
+sourceCompatibility = '17'
+
+repositories {
+	mavenCentral()
+}
+
+dependencies {
+	implementation 'org.springframework.boot:spring-boot-starter-web'
+	testImplementation 'org.springframework.boot:spring-boot-starter-test'
+	testImplementation 'au.com.dius.pact:consumer:4.4.2'
+	testImplementation 'au.com.dius.pact.consumer:junit5:4.4.2'
+	testImplementation 'au.com.dius.pact:provider:4.4.2'
+	testImplementation 'au.com.dius.pact.provider:junit5:4.4.2'
+	testImplementation 'au.com.dius.pact.provider:junit5spring:4.4.2'
+}
+
+tasks.named('test') {
+	useJUnitPlatform()
+}

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.6-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,240 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,91 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'pact-example'

src/main/java/de/rpr/pactexample/PactExampleApplication.java

@@ -0,0 +1,13 @@
+package de.rpr.pactexample;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class PactExampleApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(PactExampleApplication.class, args);
+	}
+
+}

src/main/java/de/rpr/pactexample/User.java

@@ -0,0 +1,5 @@
+package de.rpr.pactexample;
+
+public record User(int id, String name) {
+
+}

src/main/java/de/rpr/pactexample/UserController.java

@@ -0,0 +1,27 @@
+package de.rpr.pactexample;
+
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.List;
+
+@RestController
+@RequestMapping("/users")
+public class UserController {
+
+    private final UserRepository userRepository;
+
+    public UserController(UserRepository userRepository) {
+        this.userRepository = userRepository;
+    }
+
+    @GetMapping
+    public List<User> getUsers() {
+        return userRepository.getAllUsers();
+    }
+
+    @GetMapping("{id}")
+    public ResponseEntity<User> getUser(@PathVariable("id") int id) {
+        return userRepository.getUser(id).map(ResponseEntity::ok).orElse(ResponseEntity.notFound().build());
+    }
+}

src/main/java/de/rpr/pactexample/UserRepository.java

@@ -0,0 +1,26 @@
+package de.rpr.pactexample;
+
+import org.springframework.stereotype.Repository;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Optional;
+
+@Repository
+public class UserRepository {
+
+    private final List<User> users = Arrays.asList(
+            new User(1, "Jane Doe"),
+            new User(2, "John Doe")
+    );
+
+    public List<User> getAllUsers() {
+        return users;
+    }
+
+    public Optional<User> getUser(int id) {
+        return users.stream()
+                .filter(u -> u.id() == id)
+                .findFirst();
+    }
+}

src/main/resources/application.properties

@@ -0,0 +1 @@
+

src/test/java/de/rpr/pactexample/PactConsumerJUnit5Test.java

@@ -0,0 +1,108 @@
+package de.rpr.pactexample;
+
+import au.com.dius.pact.consumer.MockServer;
+import au.com.dius.pact.consumer.PactTestExecutionContext;
+import au.com.dius.pact.consumer.dsl.PactBuilder;
+import au.com.dius.pact.consumer.dsl.PactDslWithProvider;
+import au.com.dius.pact.consumer.junit5.PactConsumerTestExt;
+import au.com.dius.pact.consumer.junit5.PactTestFor;
+import au.com.dius.pact.core.model.RequestResponsePact;
+import au.com.dius.pact.core.model.V4Pact;
+import au.com.dius.pact.core.model.annotations.Pact;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.web.client.RestTemplate;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@ExtendWith(PactConsumerTestExt.class)
+public class PactConsumerJUnit5Test {
+
+    @Pact(provider = "UserServiceJUnit5", consumer = "UserConsumer")
+    public V4Pact getAllUsers(PactBuilder builder) {
+
+        String expectedUsers = """
+                [
+                    {
+                        "id": 1,
+                        "name": "Jane Doe"
+                    },
+                    {
+                        "id": 2,
+                        "name": "John Doe"
+                    }
+                ]
+                """;
+
+        return builder
+                .usingLegacyDsl()
+                .given("A running user service")
+                .uponReceiving("A request for a user list")
+                .path("/users")
+                .method("GET")
+                .willRespondWith()
+                .status(200)
+                .headers(Map.of("Content-Type", "application/json"))
+                .body(expectedUsers)
+                .toPact()
+                .asV4Pact()
+                .get();
+    }
+
+    @Pact(provider = "UserServiceJUnit5", consumer = "UserConsumer")
+    public V4Pact getUserById(PactBuilder builder) {
+
+        String expectedUser = """
+                {
+                    "id": 1, 
+                    "name": "Jane Doe"
+                }
+                """;
+
+        return builder
+                .usingLegacyDsl()
+                .given("A running user service")
+                .uponReceiving("A request for a user")
+                .path("/users/1")
+                .method("GET")
+                .willRespondWith()
+                .status(200)
+                .headers(Map.of("Content-Type", "application/json"))
+                .body(expectedUser)
+                .toPact()
+                .asV4Pact()
+                .get();
+    }
+
+    @Test
+    @PactTestFor(providerName = "UserServiceJUnit5", pactMethod = "getUserById")
+    void getUserById(MockServer mockServer) {
+        RestTemplate restTemplate = new RestTemplateBuilder().rootUri(mockServer.getUrl()).build();
+        User user = restTemplate.getForObject("/users/1", User.class);
+
+        assertThat(user)
+                .isNotNull()
+                .isEqualTo(new User(1, "Jane Doe"));
+    }
+
+    @Test
+    @PactTestFor(providerName = "UserServiceJUnit5", pactMethod = "getAllUsers")
+    void getAllUsers(MockServer mockServer) {
+        RestTemplate restTemplate = new RestTemplateBuilder().rootUri(mockServer.getUrl()).build();
+        User[] response = restTemplate.getForObject("/users", User[].class);
+
+        assertThat(response)
+                .isNotNull()
+                .containsExactly(
+                        new User(1, "Jane Doe"),
+                        new User(2, "John Doe")
+                );
+    }
+
+}

src/test/java/de/rpr/pactexample/PactConsumerTest.java

@@ -0,0 +1,110 @@
+package de.rpr.pactexample;
+
+import au.com.dius.pact.consumer.ConsumerPactBuilder;
+import au.com.dius.pact.consumer.MockServer;
+import au.com.dius.pact.consumer.PactTestExecutionContext;
+import au.com.dius.pact.consumer.PactVerificationResult;
+import au.com.dius.pact.consumer.model.MockProviderConfig;
+import au.com.dius.pact.core.model.RequestResponsePact;
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.web.client.RestTemplate;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+import static au.com.dius.pact.consumer.ConsumerPactRunnerKt.runConsumerTest;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+public class PactConsumerTest {
+
+    @Test
+    public void getAllUsersPact() {
+        String expectedUsers = """
+                [
+                    {
+                        "id": 1, 
+                        "name": "Jane Doe"
+                    },
+                    {
+                        "id": 2, 
+                        "name": "John Doe"
+                    }
+                ]
+                """;
+
+        RequestResponsePact pact = ConsumerPactBuilder
+                .consumer("UserConsumer")
+                .hasPactWith("UserService")
+                .uponReceiving("A request for a user list")
+                .path("/users")
+                .method("GET")
+                .willRespondWith()
+                .status(200)
+                .headers(Map.of("Content-Type", "application/json"))
+                .body(expectedUsers)
+                .toPact();
+
+        MockProviderConfig config = MockProviderConfig.createDefault();
+        PactVerificationResult result = runConsumerTest(pact, config, PactConsumerTest::getAllUsers);
+
+        if (result instanceof PactVerificationResult.Error) {
+            throw new RuntimeException(((PactVerificationResult.Error) result).getError());
+        }
+
+        assertEquals(new PactVerificationResult.Ok(
+                Arrays.asList(
+                        new User(1, "Jane Doe"),
+                        new User(2, "John Doe")
+                )), result);
+    }
+
+    @Test
+    public void getSpecificUserPact() {
+        String expectedUser = """
+                {
+                    "id": 1, 
+                    "name": "Jane Doe"
+                }
+                """;
+
+        RequestResponsePact pact = ConsumerPactBuilder
+                .consumer("UserConsumer")
+                .hasPactWith("UserService")
+                .uponReceiving("A request for a user")
+                .path("/users/1")
+                .method("GET")
+                .willRespondWith()
+                .status(200)
+                .headers(Map.of("Content-Type", "application/json"))
+                .body(expectedUser)
+                .toPact();
+
+        MockProviderConfig config = MockProviderConfig.createDefault();
+        PactVerificationResult result = runConsumerTest(pact, config, PactConsumerTest::getUser);
+
+        if (result instanceof PactVerificationResult.Error) {
+            throw new RuntimeException(((PactVerificationResult.Error) result).getError());
+        }
+
+        assertEquals(new PactVerificationResult.Ok(new User(1, "Jane Doe")), result);
+    }
+
+    private static User getUser(MockServer mockServer, PactTestExecutionContext context) {
+        RestTemplate restTemplate = new RestTemplateBuilder().rootUri(mockServer.getUrl()).build();
+        return restTemplate.getForObject("/users/1", User.class);
+    }
+
+    private static List<User> getAllUsers(MockServer mockServer, PactTestExecutionContext context) {
+        RestTemplate restTemplate = new RestTemplateBuilder().rootUri(mockServer.getUrl()).build();
+        User[] resultingUsers = restTemplate.getForObject("/users", User[].class);
+        if (resultingUsers != null) {
+            return Arrays.stream(resultingUsers).toList();
+        } else {
+            return Collections.emptyList();
+        }
+    }
+
+}

src/test/java/de/rpr/pactexample/PactProviderJUnit5Test.java

@@ -0,0 +1,41 @@
+package de.rpr.pactexample;
+
+import au.com.dius.pact.provider.junit5.HttpTestTarget;
+import au.com.dius.pact.provider.junit5.PactVerificationContext;
+import au.com.dius.pact.provider.junit5.PactVerificationInvocationContextProvider;
+import au.com.dius.pact.provider.junitsupport.Provider;
+import au.com.dius.pact.provider.junitsupport.State;
+import au.com.dius.pact.provider.junitsupport.loader.PactFolder;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.TestTemplate;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.server.LocalServerPort;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+@Provider("UserServiceJUnit5")
+@PactFolder("build/pacts")
+public class PactProviderJUnit5Test {
+
+    @LocalServerPort
+    int port;
+
+    @BeforeEach
+    public void setup(PactVerificationContext context) {
+        context.setTarget(new HttpTestTarget("localhost", port));
+    }
+
+    // see: https://docs.pact.io/getting_started/provider_states
+    @State("A running user service")
+    void setupUserService() {
+        // no state setup ATM
+    }
+
+    @TestTemplate
+    @ExtendWith(PactVerificationInvocationContextProvider.class)
+    void pactVerificationTestTemplate(PactVerificationContext context) {
+        context.verifyInteraction();
+    }
+}

src/test/java/de/rpr/pactexample/PactProviderSpringJUnit5Test.java

@@ -0,0 +1,53 @@
+package de.rpr.pactexample;
+
+import au.com.dius.pact.provider.junit5.PactVerificationContext;
+import au.com.dius.pact.provider.junit5.PactVerificationInvocationContextProvider;
+import au.com.dius.pact.provider.junitsupport.Provider;
+import au.com.dius.pact.provider.junitsupport.State;
+import au.com.dius.pact.provider.junitsupport.loader.PactFolder;
+import au.com.dius.pact.provider.spring.junit5.MockMvcTestTarget;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.TestTemplate;
+import org.junit.jupiter.api.extension.ExtendWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.autoconfigure.web.servlet.WebMvcTest;
+import org.springframework.boot.test.context.TestConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.test.web.servlet.MockMvc;
+
+@WebMvcTest
+@Provider("UserServiceJUnit5")
+@PactFolder("build/pacts")
+public class PactProviderSpringJUnit5Test {
+
+    @TestConfiguration
+    static class Config {
+
+        @Bean
+        public UserRepository userRepo() {
+            return new UserRepository();
+        }
+    }
+
+    @Autowired
+    MockMvc mockMvc;
+    @Autowired
+    UserRepository userRepository;
+
+    @BeforeEach
+    public void setup(PactVerificationContext context) {
+        context.setTarget(new MockMvcTestTarget(mockMvc));
+    }
+
+    // see: https://docs.pact.io/getting_started/provider_states
+    @State("A running user service")
+    void setupUserService() {
+        // no state setup ATM
+    }
+
+    @TestTemplate
+    @ExtendWith(PactVerificationInvocationContextProvider.class)
+    void pactVerificationTestTemplate(PactVerificationContext context) {
+        context.verifyInteraction();
+    }
+}

src/test/java/de/rpr/pactexample/PactProviderTest.java

@@ -0,0 +1,86 @@
+package de.rpr.pactexample;
+
+import au.com.dius.pact.core.model.*;
+import au.com.dius.pact.provider.*;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.server.LocalServerPort;
+
+import java.io.File;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+public class PactProviderTest {
+
+    ProviderInfo providerInfo;
+    ConsumerInfo consumerInfo;
+    static Pact consumerPact;
+
+    @LocalServerPort
+    int port;
+
+    @BeforeEach
+    void setup() {
+        providerInfo = new ProviderInfo("UserService");
+        providerInfo.setProtocol("http");
+        providerInfo.setHost("localhost");
+        providerInfo.setPort(port);
+        providerInfo.setPath("/");
+
+        consumerInfo = new ConsumerInfo("UserClient");
+        consumerInfo.setName("consumer_client");
+        consumerInfo.setPactSource(new FileSource(new File("build/pacts/UserConsumer-UserService.json")));
+        //noinspection ConstantConditions
+        consumerPact = DefaultPactReader.INSTANCE.loadPact(consumerInfo.getPactSource());
+    }
+
+    @Test
+    void runConsumerPacts() {
+        // grab the first interaction from the pact with consumer
+        Interaction interaction = consumerPact.getInteractions().get(0);
+
+        // setup the verifier
+        ProviderVerifier verifier = setupVerifier(interaction, providerInfo, consumerInfo);
+
+        // setup any provider state
+
+        // setup the client and interaction to fire against the provider
+        ProviderClient client = new ProviderClient(providerInfo, new HttpClientFactory());
+        Map<String, Object> failures = new HashMap<>();
+        //noinspection ConstantConditions
+
+        VerificationResult result = verifier.verifyResponseFromProvider(
+                providerInfo,
+                interaction.asSynchronousRequestResponse(),
+                interaction.getDescription(),
+                failures,
+                client);
+
+        if (!(result instanceof VerificationResult.Ok)) {
+            verifier.displayFailures(List.of((VerificationResult.Failed) result));
+        }
+        assertThat(result).isInstanceOf(VerificationResult.Ok.class);
+    }
+
+    private ProviderVerifier setupVerifier(Interaction interaction, ProviderInfo provider, ConsumerInfo consumer) {
+        ProviderVerifier verifier = new ProviderVerifier();
+
+        verifier.initialiseReporters(provider);
+
+        if (!interaction.getProviderStates().isEmpty()) {
+            for (ProviderState providerState : interaction.getProviderStates()) {
+                //noinspection ConstantConditions
+                verifier.reportStateForInteraction(providerState.getName(), provider, consumer, true);
+            }
+        }
+
+        verifier.reportInteractionDescription(interaction);
+
+        return verifier;
+    }
+}