JsonResourceChecker

The JsonResourceChecker class is responsible for verifying the structure and content of a JSON file to ensure that it meets specific criteria. It checks whether the JSON file contains a valid structure with required fields and verifies that the "Resource" field does not contain a single asterisk '*'. The class contains a static method verifyInputJson(File inputFile) that when called returns false if the File contains a single 'asterisk' in Resource field and true if it contains any other content. Method throws a Runtime Exception if the file doesn't follow the AWS::IAM::Role Policy structure.

Example AWS::IAM::Role Policy file structure:

{
    "PolicyName": "root",
    "PolicyDocument": {
        "Version": "2012-10-17",
        "Statement": [
            {
                "Sid": "IamListAccess",
                "Effect": "Allow",
                "Action": [
                    "iam:ListRoles",
                    "iam:ListUsers"
                ],
                "Resource": "*"
            }
        ]
    }
}

Usage

To use the JsonResourceChecker class, follow these steps:

1. Clone the Repository Clone the repository containing the JsonResourceChecker class into your local environment.

2. Input JSON File Place your input JSON file (input.json) in the src/main/resources directory within the project.

3. Run the Main Method Open the JsonResourceChecker class in your preferred Java development environment (e.g., IntelliJ IDEA, Eclipse).

4. Run the Main Method Execute the main method in the JsonResourceChecker class. This will load the input JSON file, verify its structure and content, and print the result to the console.

Running the Program

You can run the JsonResourceChecker program by executing the main method in the JsonResourceChecker class. Ensure that your project setup includes the required dependencies (e.g., Jackson ObjectMapper for JSON processing).

public class JsonResourceChecker {

    public static void main(String[] args) {
        String resourcePath = "input.json"; // Relative path within the resources directory
        File inputFile = FileResourceLoader.getResourceFile(resourcePath, JsonResourceChecker.class);

        if (inputFile == null) {
            System.err.println("Input JSON file not found: " + resourcePath);
            return;
        }

        try {
            boolean result = verifyInputJson(inputFile);
            System.out.println("Resource field does not contain a single asterisk: " + result);
        } catch (IOException e) {
            System.err.println("Error reading or parsing JSON file: " + e.getMessage());
        }
    }
}

Instructions

1. Ensure the input JSON file (input.json) is located in the src/main/resources directory.
2. Run the main method in the JsonResourceChecker class.
3. Check the console output to see if the "Resource" field in the JSON file meets the required criteria.

Notes

• Make sure to replace input.json with your own JSON file name if it differs.
• The JsonResourceChecker class uses the Jackson library (ObjectMapper) for JSON parsing. Ensure the library is correctly configured in your project.

JsonResourceCheckerTest

The JsonResourceCheckerTest class is used to test the functionality of the JsonResourceChecker class, which verifies the structure and content of JSON files.

Test Methods

1. testVerifyInputJson_ContainingAsteriskReturnFalse

   • Verifies that verifyInputJson method returns false when the input JSON file contains a single asterisk ('*') in the "Resource" field.

2. testVerifyInputJson_NotContainingAsteriskReturnTrue

   • Verifies that verifyInputJson method returns true when the input JSON file does not contain a single asterisk in the "Resource" field.

3. testVerifyInputJson_InvalidJsonMissingStatement

   • Tests the behavior of verifyInputJson method when the input JSON file is missing the "Statement" field, which is required.
   • Expects a RuntimeException with a specific error message related to the missing "Statement" field.

4. testVerifyInputJson_InvalidJsonMissingPolicyDocument

   • Tests the behavior of verifyInputJson method when the input JSON file is missing the "PolicyDocument" field, which is required.
   • Expects a RuntimeException with a specific error message related to the missing "PolicyDocument" field.

5. testVerifyInputJson_InvalidJsonMissingResource

   • Tests the behavior of verifyInputJson method when the input JSON file is missing the "Resource" field within the "Statement" array.
   • Expects a RuntimeException with a specific error message related to the missing "Resource" field.

Instructions for Running Tests

1. Setup

   • Ensure that you have the required dependencies and test framework configured (e.g., JUnit 5).

2. File Preparation

   • Prepare the test JSON files (valid_input.json, no_asterisk.json, missing_statement.json, missing_policy.json, missing_resource.json) and place them in the appropriate location within the resources directory (src/test/resources).

3. Running Tests

   • Open the JsonResourceCheckerTest class in your IDE.
   • Run each test method individually or execute all test methods to validate the behavior of the JsonResourceChecker class under different scenarios.