Class not Found org/hamcrest/TypeSafeMatcher

Question

I am trying to create a project using Rest Assured with TestNG, but I am running into an issue with java.lang.NoClassDefFoundError: org/hamcrest/TypeSafeMatcher . Rather new to this, so any help is appreciated.

I am using Maven:

<dependencies>
        <dependency>
            <groupId>io.rest-assured</groupId>
            <artifactId>rest-assured</artifactId>
            <version>3.0.3</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>io.rest-assured</groupId>
            <artifactId>json-schema-validator</artifactId>
            <version>3.0.3</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.testng</groupId>
            <artifactId>testng</artifactId>
            <version>6.8</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

The stack trace:

java.lang.NoClassDefFoundError: org/hamcrest/TypeSafeMatcher

    at java.lang.ClassLoader.defineClass1(Native Method)
    at java.lang.ClassLoader.defineClass(ClassLoader.java:763)
    at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
    at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
    at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
    at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at Tests.GameTests.GameTest.testGameSchema(GameTest.java:24)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:80)
    at org.testng.internal.Invoker.invokeMethod(Invoker.java:714)
    at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
    at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
    at org.testng.TestRunner.privateRun(TestRunner.java:767)
    at org.testng.TestRunner.run(TestRunner.java:617)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)
    at org.testng.SuiteRunner.run(SuiteRunner.java:240)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1198)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1123)
    at org.testng.TestNG.run(TestNG.java:1031)
    at org.testng.IDEARemoteTestNG.run(IDEARemoteTestNG.java:72)
    at org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:127)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: java.lang.ClassNotFoundException: org.hamcrest.TypeSafeMatcher
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 41 more

package Tests.GameTests;

import Tests.TestModel;
import com.github.fge.jsonschema.cfg.ValidationConfiguration;
import com.github.fge.jsonschema.main.JsonSchemaFactory;
import org.testng.annotations.Test;

import static com.github.fge.jsonschema.SchemaVersion.DRAFTV4;
import static io.restassured.RestAssured.when;
import static io.restassured.module.jsv.JsonSchemaValidator.matchesJsonSchemaInClasspath;

public class GameTest extends TestModel {

    @Test
    public void testGameSchema() {
        JsonSchemaFactory jsonSchemaFactory = JsonSchemaFactory.newBuilder().
            setValidationConfiguration(ValidationConfiguration.
            newBuilder().
            setDefaultVersion(DRAFTV4).freeze()).freeze();

        when().
            get("/games/114").
            then().
            assertThat().
            body(matchesJsonSchemaInClasspath("game_schema.json").
                    using(jsonSchemaFactory));
    }
}

can you post your `testng` file also, i think there is the wrong, you have to give the class name as `org.hamcrest.TypeSafeMatcher` instead of `org/hamcrest/TypeSafeMatcher` — Sarada Akurathi, May 19 '17 at 08:22

score 4 · Accepted Answer · answered May 19 '17 at 14:43

You could explicitly add hamcrest dependency in your pom.

<dependency>
    <groupId>org.hamcrest</groupId>
    <artifactId>hamcrest-all</artifactId>
    <version>1.3</version>
</dependency>

I've faced similar issues with hamcrest several times, and adding it explicitly always helped.

score 2 · Answer 2 · answered Feb 06 '18 at 20:47

I had the exact same error except that I'm using JUnit instead of TestNG. That doesn't help the original poster but I figured that there were others like me.

The accepted answer wasn't working for me but I found that putting the Rest Assured dependency before JUnit in my POM solved the problem (I had Rest Assured after JUnit):

<dependencies>
    <!-- Other dependencies... -->
    <!-- Add dependency for Rest Assured (has to go before JUnit to work) -->
    <dependency>
        <groupId>io.rest-assured</groupId>
        <artifactId>rest-assured</artifactId>
        <version>3.0.6</version>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.10</version>
        <scope>test</scope>
    </dependency>
    <!-- Other dependencies... -->
</dependencies>

Source: https://github.com/rest-assured/rest-assured/wiki/GettingStarted#maven--gradle-users

Notes

You should place rest-assured before the JUnit dependency declaration in your pom.xml / build.gradle in order to make sure that the correct version of Hamcrest is used.

REST Assured includes JsonPath and XmlPath as transitive dependencies

(emphasis is mine)

Damn, that would have costed me days to find out. If ever. I might just have avoided it altogether. Great info. This should be an accepted answer. It should also be available on restassured.io. Cheers — Mats, Dec 11 '18 at 11:41

Class not Found org/hamcrest/TypeSafeMatcher

2 Answers2