RestAssured Oauth2 token generation code.

Actually its of two steps.
1) login in web using authorize url and obtain code
2) using code and other attributes generate token.

Selenium code to obtain code from Authorize url

public void getToken() {
System.setProperty("webdriver.chrome.driver",
"path of chrome");

WebDriver driver = new ChromeDriver();

String scope="#scope#";
//please use static declarations for the url, clientid, redirecturi
System.out.println(""+url+"?scope="+scope+"&auth_url="+url+"&client_id="+client_id+"&response_type=code&redirect_uri="+call_back+"");

driver.get(
""+url+"?scope="+scope+"&auth_url="+url+"&client_id="+client_id+"&response_type=code&redirect_uri="+call_back+"");

driver.findElement(By.id("UserName")).sendKeys("#user#");
driver.findElement(By.id("Passwd")).sendKeys("#password#");
driver.findElement(By.xpath("//*[@id=\'\']/div[4]/button")).click(); - LOGIN Button

//Capture code from the URL

String token_url = driver.getCurrentUrl();
String[] code1 = token_url.split("code=");

code = code1[1];
System.out.println(code);

driver.close();

}

Generate token from token using code

public void token() {

baseURI = "baseurl";

String test = "code=" + code

+ "&client_id="+client_id+"&client_secret="+client_secret+"&grant_type=authorization_code&redirect_uri="+call_back+"";

String response = given().urlEncodingEnabled(false).contentType(ContentType.URLENC).body(test).when().log()

.all().post("/oauth/token").asString();

JsonPath js = new JsonPath(response);

access_token = js.getString("access_token");

System.out.println(access_token);

}