How to request API with payload from .vm file in restAssured

To send an API request with a payload from a .vm file using RestAssured, you can read the contents of the .vm file, populate it with the required data, and then send the request with the populated payload. Here's an example of how you can achieve this:

1. Read .vm File:

First, read the contents of the .vm file that contains the payload template. You can use Java's File and FileReader classes to accomplish this. Here's an example:

import java.io.File;
import java.io.FileReader;
import java.io.IOException;

File file = new File("path/to/payload.vm");
StringBuilder payloadBuilder = new StringBuilder();
try (FileReader reader = new FileReader(file)) {
    int character;
    while ((character = reader.read()) != -1) {
        payloadBuilder.append((char) character);
    }
} catch (IOException e) {
    e.printStackTrace();
}

String payloadTemplate = payloadBuilder.toString();

In this example, replace `"path/to/payload.vm"` with the actual path to your .vm file. The contents of the file are stored in the `payloadTemplate` variable as a string.

2. Populate Payload Template:

Next, populate the payload template with the required data. You can use any method you prefer to fill in the dynamic values within the template. Here's an example:

String populatedPayload = payloadTemplate.replace("$variable1", "value1").replace("$variable2", "value2");

In this example, we replace the placeholders `$variable1` and `$variable2` with the desired values, such as `"value1"` and `"value2"`, respectively. Modify this step according to your payload template structure and the actual data you need to inject.

3. Send Request with Populated Payload:

Finally, use RestAssured to send the API request with the populated payload. Here's an example of sending a POST request with the populated payload:

import io.restassured.RestAssured;
import io.restassured.response.Response;

Response response = RestAssured.given()
    .contentType("application/json")
    .body(populatedPayload)
    .post("https://api.example.com/endpoint");

In this example, we set the content type of the request to `"application/json"` using the `contentType()` method. The populated payload is included in the request body using the `body()` method. Adjust the content type and request method (e.g., GET, PUT, DELETE) based on your specific API requirements.

RestAssured will send the request with the populated payload to the specified API endpoint, and the response will be stored in the `response` variable.

By reading the .vm file, populating the payload template with the required data, and sending the request with the populated payload, you can interact with APIs using dynamic payloads in RestAssured.