Using REST Assured, how can I validate the data type in an array of Json object

Question

I'm new to Rest Assured and trying to do some validations using json-schema-validator version-4.3.0. Getting errors while running it. Need help in this.

This is my schema(sample.json):

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "type": "object",
  "properties": {
    "title": {
      "type": "string"
    },
    "subTitle": {
      "type": "string"
    },
    "author": {
      "type": "string"
    },
    "publish_date": {
      "type": "string"
    },
    "publisher": {
      "type": "string"
    },
    "pages": {
      "type": "number"
    },
    "Description": {
      "type": "string"
    },
    "Website": {
      "type": "string"
    }
  },
  "required": ["title", "subTitle", "author", "publish_date", "publisher", "pages", "Description", "Website"]
}

and the my json response is something like this:

{
  "books": [
    {
      "isbn": "9781449325862",
      "title": "Git Pocket Guide",
      "subTitle": "A Working Introduction",
      "author": "Richard E. Silverman",
      "publish_date": "2020-06-04T08:48:39.000Z",
      "publisher": "O'Reilly Media",
      "pages": 234,
      "description": "This pocket guide is the perfect on-the-job companion to Git, the distributed version control system. It provides a compact, readable introduction to Git for new users, as well as a reference to common commands and procedures for those of you with Git exp",
      "website": "http://chimera.labs.oreilly.com/books/1230000000561/index.html"
    }
}

The testcase written is:

public class AppTest {
 
    @Test
    public void verifyJsonSchema() {
        

        // GIVEN
        RestAssured
            .given()
                .baseUri("https://bookstore.toolsqa.com/BookStore/v1/Books/9781449325862")
        // WHEN
            .when()
                .get()
        // THEN
            .then()
                .assertThat()
                .statusCode(200)
                .body(JsonSchemaValidator.matchesJsonSchemaInClasspath("sample.json"));
    }
 
}

And the error that I/m getting is:

[RemoteTestNG] detected TestNG version 6.14.3
FAILED: verifyJsonSchema
io.restassured.module.jsv.JsonSchemaValidationException: com.fasterxml.jackson.core.JsonParseException: Unexpected character ('<' (code 60)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')
 at [Source: java.io.StringReader@56febdc; line: 2, column: 2]
    at io.restassured.module.jsv.JsonSchemaValidator.matchesSafely(JsonSchemaValidator.java:233)
    at io.restassured.module.jsv.JsonSchemaValidator.matchesSafely(JsonSchemaValidator.java:75)
    at org.hamcrest.TypeSafeMatcher.matches(TypeSafeMatcher.java:65)
    at org.hamcrest.Matcher$matches.call(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:128)
    at io.restassured.assertion.BodyMatcher.validate(BodyMatcher.groovy:76)
    at io.restassured.assertion.BodyMatcher$validate$0.call(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:144)
    at io.restassured.assertion.BodyMatcherGroup$_validate_closure2.doCall(BodyMatcherGroup.groovy:47)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.codehaus.groovy.reflection.CachedMethod.invoke(CachedMethod.java:98)
    at groovy.lang.MetaMethod.doMethodInvoke(MetaMethod.java:325)
    at org.codehaus.groovy.runtime.metaclass.ClosureMetaClass.invokeMethod(ClosureMetaClass.java:264)
    at groovy.lang.MetaClassImpl.invokeMethod(MetaClassImpl.java:1034)
    at groovy.lang.Closure.call(Closure.java:418)
    at groovy.lang.Closure.call(Closure.java:434)
    at org.codehaus.groovy.runtime.DefaultGroovyMethods.collect(DefaultGroovyMethods.java:3287)
    at org.codehaus.groovy.runtime.DefaultGroovyMethods.collect(DefaultGroovyMethods.java:3257)
    at org.codehaus.groovy.runtime.dgm$67.invoke(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite$PojoMetaMethodSiteNoUnwrapNoCoerce.invoke(PojoMetaMethodSite.java:274)
    at org.codehaus.groovy.runtime.callsite.PojoMetaMethodSite.call(PojoMetaMethodSite.java:56)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:128)
    at io.restassured.assertion.BodyMatcherGroup.validate(BodyMatcherGroup.groovy:47)
    at io.restassured.assertion.BodyMatcherGroup$validate$3.call(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCall(CallSiteArray.java:47)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:116)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.call(AbstractCallSite.java:144)
    at io.restassured.internal.ResponseSpecificationImpl$HamcrestAssertionClosure.validate(ResponseSpecificationImpl.groovy:481)
    at io.restassured.internal.ResponseSpecificationImpl$HamcrestAssertionClosure$validate$1.call(Unknown Source)
    at io.restassured.internal.ResponseSpecificationImpl.validateResponseIfRequired(ResponseSpecificationImpl.groovy:656)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite$PogoCachedMethodSiteNoUnwrapNoCoerce.invoke(PogoMetaMethodSite.java:210)
    at org.codehaus.groovy.runtime.callsite.PogoMetaMethodSite.callCurrent(PogoMetaMethodSite.java:59)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:51)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:157)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:169)
    at io.restassured.internal.ResponseSpecificationImpl.content(ResponseSpecificationImpl.groovy:97)
    at io.restassured.specification.ResponseSpecification$content$1.callCurrent(Unknown Source)
    at org.codehaus.groovy.runtime.callsite.CallSiteArray.defaultCallCurrent(CallSiteArray.java:51)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:157)
    at org.codehaus.groovy.runtime.callsite.AbstractCallSite.callCurrent(AbstractCallSite.java:177)
    at io.restassured.internal.ResponseSpecificationImpl.body(ResponseSpecificationImpl.groovy:256)
    at io.restassured.internal.ValidatableResponseOptionsImpl.body(ValidatableResponseOptionsImpl.java:268)
    at Sample.Sample.AppTest.verifyJsonSchema(AppTest.java:27)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:124)
    at org.testng.internal.Invoker.invokeMethod(Invoker.java:583)
    at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:719)
    at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:989)
    at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125)
    at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:109)
    at org.testng.TestRunner.privateRun(TestRunner.java:648)
    at org.testng.TestRunner.run(TestRunner.java:505)
    at org.testng.SuiteRunner.runTest(SuiteRunner.java:455)
    at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:450)
    at org.testng.SuiteRunner.privateRun(SuiteRunner.java:415)
    at org.testng.SuiteRunner.run(SuiteRunner.java:364)
    at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
    at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:84)
    at org.testng.TestNG.runSuitesSequentially(TestNG.java:1208)
    at org.testng.TestNG.runSuitesLocally(TestNG.java:1137)
    at org.testng.TestNG.runSuites(TestNG.java:1049)
    at org.testng.TestNG.run(TestNG.java:1017)
    at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:115)
    at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)
    at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)
Caused by: com.fasterxml.jackson.core.JsonParseException: Unexpected character ('<' (code 60)): expected a valid value (number, String, array, object, 'true', 'false' or 'null')
 at [Source: java.io.StringReader@56febdc; line: 2, column: 2]
    at com.fasterxml.jackson.core.JsonParser._constructError(JsonParser.java:1369)
    at com.fasterxml.jackson.core.base.ParserMinimalBase._reportError(ParserMinimalBase.java:532)
    at com.fasterxml.jackson.core.base.ParserMinimalBase._reportUnexpectedChar(ParserMinimalBase.java:453)
    at com.fasterxml.jackson.core.json.ReaderBasedJsonParser._handleUnexpectedValue(ReaderBasedJsonParser.java:1386)
    at com.fasterxml.jackson.core.json.ReaderBasedJsonParser.nextToken(ReaderBasedJsonParser.java:669)
    at com.fasterxml.jackson.databind.MappingIterator.hasNextValue(MappingIterator.java:159)
    at com.github.fge.jackson.JsonNodeReader.readNode(JsonNodeReader.java:142)
    at com.github.fge.jackson.JsonNodeReader.fromReader(JsonNodeReader.java:127)
    at com.github.fge.jackson.JsonLoader.fromReader(JsonLoader.java:193)
    at com.github.fge.jackson.JsonLoader.fromString(JsonLoader.java:206)
    at io.restassured.module.jsv.JsonSchemaValidator.matchesSafely(JsonSchemaValidator.java:214)
    ... 80 more

Also, I would like to know if it's possible to validate different data types like char, date, number? if Yes then do help me with that as well.

Thanks in advance...

lucas-nguyen-17 · Accepted Answer · 2021-06-19 03:06:52Z

Your schema is wrong. You can use this schema.

{
  "$schema": "http://json-schema.org/draft-04/schema#",
  "type": "object",
  "properties": {
    "books": {
      "type": "array",
      "items": [
        {
          "type": "object",
          "properties": {
            "isbn": {
              "type": "string"
            },
            "title": {
              "type": "string"
            },
            "subTitle": {
              "type": "string"
            },
            "author": {
              "type": "string"
            },
            "publish_date": {
              "type": "string"
            },
            "publisher": {
              "type": "string"
            },
            "pages": {
              "type": "integer"
            },
            "description": {
              "type": "string"
            },
            "website": {
              "type": "string"
            }
          },
          "required": [
            "isbn",
            "title",
            "subTitle",
            "author",
            "publish_date",
            "publisher",
            "pages",
            "description",
            "website"
          ]
        }
      ]
    }
  },
  "required": [
    "books"
  ]
}

In json, there are 6 data types: number, string, array, object, boolean, null. You cannot validate char, date-time...

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