I'm trying to unit test with a file located under src/test/resources, but I can't always get a nullpointer when I'm trying to read it.

I'm using Spring Boot 2.0.2, with JDK 10 and Gradle.

I've tried many variants of code found when googeling the problem, but I have no success.

My build.gradle looks like this:

```
buildscript {
     ext {
        springBootVersion = '2.0.2.RELEASE'
    }
    repositories {
        mavenCentral()
    }
    dependencies {
        classpath("org.springframework.boot:spring-boot-gradle-plugin:${springBootVersion}")
    }
}

apply plugin: 'java'
apply plugin: 'eclipse'
apply plugin: 'org.springframework.boot'
apply plugin: 'io.spring.dependency-management'

group = 'com.moc.omc'
version = '0.0.1-SNAPSHOT'
sourceCompatibility = 10

repositories {
    mavenCentral()
    jcenter()
}
dependencies {
    compile("org.springframework.boot:spring-boot-starter-web")
    compile("org.springframework.boot:spring-boot-devtools")
    compile("org.springframework.boot:spring-boot-starter-data-jpa")
    compile("javax.xml.bind:jaxb-api:2.3.0")
    compile("com.h2database:h2")
    compile("io.springfox:springfox-swagger2:2.9.0")
    compile("io.springfox:springfox-swagger-ui:2.9.0")
    testCompile('org.springframework.boot:spring-boot-starter-test')
}

```

My test is some variant of these lines (nothing I've tried has had any success):

```
@Test
public void isSortedCorrectly() throws IOException {
    ClassLoader classLoader = getClass().getClassLoader();
    File file = new File(classLoader.getResource("test-file.json").getFile()); // java.lang.NullPointerException
}

```

The test class is here:

> 
> src\test\java\com\moc\omc\x\y\MyUnitTest.java
> 
> 
> 

The test file is here:

> 
> src\test\java\resources\test-file.json
> 
> 
>