Unit Test Generator

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0 Uses

Prompt

ChatGPT
Claude
Grok
OpenRouter
Language and test framework: {{LANGUAGE_AND_FRAMEWORK}}
Code to test:
{{CODE}}

# Unit Test Generator

1. Test Scope Selection
Ask: "Would you like to:
1. Generate tests for a specific file/component
2. Generate tests for new/modified code
3. Add tests for uncovered functionality"

2. Code Analysis
- Identify function signatures
- Map dependencies and imports
- Detect state management
- Find edge cases
- Review existing tests

3. Test Framework Detection
- Check project for testing setup
- Identify test patterns in use
- Match existing test style
- Determine language and framework

4. Generate Test Suite
Based on detected language and framework, generate appropriate test structure.

Example structures by language:

For JavaScript/TypeScript (Jest):
```typescript:src/__tests__/component.test.ts
import { Component } from '../component';

describe('ComponentName', () => {
test('should behave as expected', () => {
// Arrange
// Act
// Assert
});

test('should handle edge case', () => {
// Edge case testing
});
});
```

For Java (JUnit):
```
import org.junit.Test;
import static org.junit.Assert.*;

public class ComponentTest {
@Test
public void shouldBehaveAsExpected() {
// Arrange
// Act
// Assert
}

@Test
public void shouldHandleEdgeCase() {
// Edge case testing
}
}
```

For Python (pytest):
```
from component import Component

def test_should_behave_as_expected():
# Arrange
# Act
# Assert

def test_should_handle_edge_case():
# Edge case testing
```

For Ruby (RSpec):
```
require 'component'

RSpec.describe Component do
it "should behave as expected" do
# Arrange
# Act
# Assert
end

it "should handle edge case" do
# Edge case testing
end
end
```
5. Test Cases Include
For each function/method:

Core Testing
- Happy path with expected inputs
- Edge cases and boundary values
- Error/exception handling
- Input validation
- State changes before/after
- Resource initialization/cleanup

Integration Points
- Dependencies and mocks
- External service calls
- Database operations
- File system interactions

Performance
- Response time requirements
- Resource usage limits
- Concurrency handling
- Load conditions

6. Coverage Validation
Code Analysis
- Branch coverage
- Statement coverage
- Path coverage
- Exception coverage

Quality Checks
- Test isolation
- Mock usage
- Assertion completeness
- Setup/teardown cleanup

Recommendations
- Missing test cases
- Additional edge cases
- Integration scenarios
- Performance tests

Customize this prompt

Fill in the variables below to personalize this prompt:

ChatGPT
Claude
Grok
OpenRouter

Model Settings

Recommended Models

ChatGPT Claude Gemini

Temperature

0.7

Max Tokens

2000

Additional Notes

Adapted from Coding the Future With AI, software-dev-prompt-library, https://github.com/codingthefuturewithai/software-dev-prompt-library (MIT, https://opensource.org/license/mit). Copyright (c) 2024 Coding the Future With AI. Changes made: light edits for clarity, placeholders and formatting. Sources and licences: https://www.thepromptindex.com/prompt-sources.php

About this prompt

“Unit Test Generator” is a free prompt for ChatGPT in the Coding & Software category, 358 words long, added to The Prompt Index on October 28, 2026 by Coding the Future With AI. Copy it with the button above, paste it into ChatGPT or any other AI chat assistant, and send it.

It has 2 placeholders to fill in first: {{LANGUAGE_AND_FRAMEWORK}}, {{CODE}}. Use the “Customize this prompt” fields to personalise it before you copy.

Recommended models: ChatGPT, Claude, Gemini.

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