QueryRestEndPoint.java

package com.automation.env;

import io.restassured.RestAssured;

public class QueryRestEndPoint {
	
	public String getData() {
		String url = System.getenv("ENV_URL");
		return RestAssured.given().get(url).thenReturn().asString();
	}

}

TestQueryRestEndPoint.java

package com.automation.env;

import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import org.junitpioneer.jupiter.RestoreEnvironmentVariables;
import org.junitpioneer.jupiter.SetEnvironmentVariable;

@RestoreEnvironmentVariables
public class TestQueryRestEndPoint {
	
	private QueryRestEndPoint query = new QueryRestEndPoint();
	
	@Test
	@SetEnvironmentVariable(key = "ENV_URL", value = "http://demo9511612.mockable.io/info")
	public void test_Get_info_end_point() {
		String response = query.getData();
		Assertions.assertTrue(response.contains("name"), "Name Property not found");
		
	}
	
	@Test
	@SetEnvironmentVariable(key = "ENV_URL", value = "http://demo9511612.mockable.io/phone")
	public void test_Get_phone_end_point() {
		String response = query.getData();
		Assertions.assertTrue(response.contains("PhoneNumber"), "PhoneNumber Property not found");
	}

}