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    Home»Development»Rest Assured – Schema to use cannot be null

    Rest Assured – Schema to use cannot be null

    May 30, 2025

    I’m working with Java and REST Assured to test REST APIs. I was trying the example with JSON schema validation but it throws this error:

    java.lang.IllegalArgumentException: Schema to use cannot be null
    
    at io.restassured.module.jsv.JsonSchemaValidator.validateSchemaIsNotNull(JsonSchemaValidator.java:270)
    at io.restassured.module.jsv.JsonSchemaValidator.access$300(JsonSchemaValidator.java:75)
    at io.restassured.module.jsv.JsonSchemaValidator$JsonSchemaValidatorFactory.create(JsonSchemaValidator.java:281)
    at io.restassured.module.jsv.JsonSchemaValidator.matchesJsonSchema(JsonSchemaValidator.java:166)
    at io.restassured.module.jsv.JsonSchemaValidator.matchesJsonSchemaInClasspath(JsonSchemaValidator.java:117)
    at suites.SchemaFollowupTest.ContractFollowUpTestSuccess(SchemaFollowupTest.java:44)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    

    My test code is:

    given()
                .header("Content-Type", ContentType.JSON)
                //.header("Authorization", "Bearer " + ConfigEnvironments.TOKEN_K8S)
                .body(jsonBody)
                .when()
                .post(ConfigEnvironments.BASE_URL_CLAIMENGINE +"/api/v1/FollowUp")
                .then().log().all()
                .statusCode(202)
                .and()
                .body(matchesJsonSchemaInClasspath("src/test/resource/followup-schema.json"));
    

    My strucuture folder is here:
    [1]: https://i.sstatic.net/K9m2UjGy.png

    Source: Read More

    Hostinger
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