--- title: AI Unit Test Generator | API & LLM Test Automation | Roost.ai description: Generate unit tests instantly with AI. Automate API testing, LLM test cases, and code validation with RoostGPT. Improve coverage and speed delivery. --- AI-Powered Unit Test Generation ## **From source code to passing tests automatically.** RoostGPT analyzes your codebase, generates framework-native unit tests, fixes failing tests, and helps teams reach 95%+ code coverage in minutes. [ Book an Enterprise Demo ](https://roost.ai/roost-demo) [ Try RoostGPT ](https://app.roost.ai/tryRoostAI) **Java** **Python** **Go** **C#** **Node.js** **React** **C++** **01**Analyzing AST, call graph, and dependencies... **02**Generating framework-native test cases... **03**Running tests and repairing failures... **04**Coverage report generated successfully. 95%+ Code coverage reached with generated, passing unit tests. ## Customers Adopting Generative AI Driven Testing and Development ![LOGO_Epsilon](https://roost.ai/hubfs/logos/customer/LOGO_Epsilon.jpeg "LOGO_Epsilon") ![LOGO_productiv](https://roost.ai/hubfs/logos/customer/LOGO_productiv.png "LOGO_productiv") ![LOGO-simpplr](https://roost.ai/hubfs/logos/customer/LOGO-simpplr.png "LOGO-simpplr") ![LOGO-beyond-limits](https://roost.ai/hubfs/logos/customer/LOGO-beyond-limits.png "LOGO-beyond-limits") ![LOGO_B-country](https://roost.ai/hubfs/logos/customer/LOGO_B-country.png "LOGO_B-country") ![logo_lightbeam](https://roost.ai/hubfs/logos/customer/logo_lightbeam.png "logo_lightbeam") ### Keep building the same way... using the same DevOps tools you love! The Roost platform takes care of the complex parts of testing and deploying changes.   ### 7 Languages ### 15+ Frameworks ### 10 AI Providers ### 95%+ Coverage **Five Steps to Full Coverage** ## Analyze, plan, write, fix, and pass. RoostGPT turns code understanding into executable tests and keeps improving them until they compile, run, and pass. ##### **1** ##### **Analyze** Reads source code using AST parsing, call graph analysis, and dependency mapping. ##### **2** ##### **Plan** Identifies which test classes, paths, and scenarios need to be generated. ##### **3** ##### **Write** Creates unit tests with assertions, mocks, setup, teardown, and edge cases. ##### **4** ##### **Fix** Diagnoses compile, runtime, import, type, and mock issues, then self-corrects. ##### **5** ##### **Pass** Executes tests, measures real coverage, and generates reports automatically. **Seven Languages. One Platform.** ## Generate tests across your engineering stack. Use one platform for framework-native output across modern application codebases. ### Languages supported - ✓Java - ✓Python - ✓Go - ✓C# - ✓Node.js - ✓React - ✓C++ **Five Steps to Full Coverage** ## Analyze, plan, write, fix, and pass. RoostGPT turns code understanding into executable tests and keeps improving them until they compile, run, and pass. **⌘** ##### **AST Parsing** Understands class structures, method signatures, type relationships, and source layout. **↔** ##### **Call Graph Analysis** Maps how methods call each other to identify critical testing paths. **☄** ##### **AST Parsing** Understands class structures, method signatures, type relationships, and source layout. **Tests That Fix Themselves** ## Generated tests improve until they pass. When a test fails to compile or run, RoostGPT diagnoses the issue and corrects common failures automatically. - ✓Constructor mismatches - ✓Missing imports - ✓Incorrect types - ✓Runtime failures - ✓Mock setup errors - ✓Assertion mismatches - ✓Dependency resolution issues **Beyond the Happy Path** ## Edge cases developers often miss. RoostGPT generates tests for boundary values, missing inputs, failures, exception paths, and concurrency risks. ##### **Boundary Values** Empty values, zero values, min/max values, overflow cases, and list size variations. ##### **Null Inputs** Null values, missing fields, empty optionals, blank parameters, and undefined inputs. ##### **Negative Testing** Invalid inputs, unauthorized access, malformed data, and failure conditions. ##### **Exception Paths** Throw statements, catch blocks, timeout handling, and error propagation. ##### **Concurrency** Race conditions, thread safety, concurrent modifications, and deadlock risks. **Enterprise-Ready Integrations** ## Fits into existing engineering workflows. Run RoostGPT in CI pipelines, across git providers, and with the AI provider of your choice. ##### **CI/CD Native ** Runs headlessly with standard exit codes, JUnit output, and artifact uploads. ##### **Git Provider Support ** Works with GitHub, GitLab, Azure DevOps, and Bitbucket. ##### **Deployment Options ** Runs on macOS, Linux, Windows, Docker, and enterprise environments. ##### **AI Provider Flexibility ** Bring your own provider and switch models without changing application code. ##### **Multi-Format Reports ** Generate HTML, Excel, PDF, JSON, XML, and DOCX coverage reports. ##### **Secure Operations ** Supports proxy and SSL environments, encrypted credentials, and license management. **Traditional Testing vs. RoostGPT** ## Move from manual effort to automated coverage. | **Category** | **Traditional Testing** | ** RoostGPT** | | --- | --- | --- | | Test Creation | Hours or days per module | **Minutes per module** | | Language Coverage | Separate tools per language | **7 languages in one platform** | | Framework Support | Often locked to one framework | **15+ frameworks supported** | | Code Analysis | Manual developer review | **AST, call graph, and dependency analysis** | | Edge Cases | Depends on developer experience | **Automatically generated** | | Mock Generation | Manual setup | **Framework-native mocks** | | Test Execution | Separate setup required | **Built-in compile, run, and coverage** | | Self-Correction | Developer fixes failures | **Agent auto-corrects failures** | | Maintenance | Manual updates | **Diff-aware incremental regeneration** | | AI Provider |  Often single-vendor | **Supports multiple providers** | | Cost Visibility | Limited | **Tracks cost per run and provider** | **Complete Unit Testing, Automated** ## Everything teams need for production-grade test automation. Unit test generation across 7 languages Native support for 15+ testing frameworks AST parsing and call graph analysis Dependency mapping and mock generation Agentic self-correcting test generation Automatic compilation and execution Code coverage measurement Edge case and boundary generation Negative and exception path coverage Diff-aware incremental regeneration Support for 10 AI providers CLI, VS Code Extension, and Web UI Docker and cross-platform deployment Knowledge base persistence Multi-format reporting AI cost tracking Encrypted credential handling Enterprise license management ## Stop writing unit tests manually. Start generating production-ready tests automatically. RoostGPT turns source code into passing, framework-native unit tests with coverage reports, self-correction, and CI/CD integration. [ Book an Enterprise Demo ](https://app.roost.ai/tryRoostAI) **Ready to modernize enterprise QA?** ## Turn software change into maintained test coverage and release confidence. In a 30-minute session, see how RoostGPT connects to your requirements, code, APIs, UI flows, and enterprise workflows to generate, maintain, govern, and report quality coverage across the SDLC. [ Book an Enterprise Demo ](https://app.roost.ai/tryRoostAI) [ Try RoostGPT ](https://app.roost.ai/tryRoostAI) ![](https://px.ads.linkedin.com/collect/?pid=3511466&fmt=gif) ```json { "@context": "https://schema.org", "@type": "Organization", "name": "Roost.AI", "legalName" : "Zettabytes Inc. dba Roost", "alternateName": "Roost, Roost AI, zb.io, roost software, roost company, roost website, roost app, roost.io, Zettabytes Inc, Zettabytes Inc. dba Roost, Zettabytes", "url": "https://roost.ai/", "logo": "https://roost.ai/hubfs/logos/Roost-logo-gold.svg", "description": "At Roost, we provide on demand and ephemeral pre production environments. Also, Roost does Environments-as-a-Service (EaaS) for pre-production cloud-native workloads.", "disambiguatingDescription": "Roost.ai is an Environments as a Service (EaaS) platform that on-demand creates an ephemeral pre-production environment. .", "foundingDate": "2019", "foundingLocation": [ { "@type": "Place", "geo": { "@type": "GeoCoordinates", "latitude": "37.28993123565664", "longitude": "-121.98808678843649" }, "name": "4950 Hamilton Ave" }], "knowsAbout": [ "Environments as a Service", "Environment as a Service", "EaaS", "ephemeral pre-production environment", "ephemeral pre-production environments", "pre-production environments", "Production-like environments", "Production-like Environments as a Service", "Instant & Ephemeral Environments for DevOps", "Ephemeral test environments", "staging environments", "Kubernetes management", "Ephemeral Environments", "Ephemeral Environments for DevOps"], "founders": [ { "@type": "Person", "name": "Rishi Yadav" }, { "@type": "Person", "name": "Sudhir Jangir" } ], "address": { "@type": "PostalAddress", "streetAddress": "4950 Hamilton Ave", "addressLocality": "San Jose", "addressRegion": "California", "postalCode": "95130", "addressCountry": "USA" }, "contactPoint": { "@type": "ContactPoint", "contactType": "customer support", "areaServed": ["US","CA","GB","AU"], "telephone": "[508-808-2441]", "availableLanguage": ["English"], "email": "info@roost.ai" }, "sameAs": [ "https://goo.gl/maps/6ZYiaECvjw8JKsxf6", "https://www.linkedin.com/company/roost/", "https://www.crunchbase.com/organization/roost-ai", "https://pitchbook.com/profiles/company/468023-05", "https://twitter.com/roost", "https://strategyinsights.eu/roost/", "https://www.reddit.com/r/roostai/", "https://github.com/roost-io", "https://zb.io/", "https://www.zoominfo.com/c/zettabytes-inc/465961516", "https://www.glassdoor.com/Jobs/Zettabytes-Inc-Zb-Jobs-EI_IE4469637.0,14_KO15,17.htm", "https://rocketreach.co/zb-io-profile_b45062cbfc7846fc", "https://dev.to/roost", "https://blog.roost.io/", "https://aws.amazon.com/marketplace/seller-profile?id=aa12f3de-8bb4-49fe-9370-471656a366fe", "https://www.signalhire.com/companies/zettabytes-inc" ]} ``` ```json { "@context" : "https://schema.org", "@type" : "VideoObject", "caption" : "No more stale QA staging environments", "contentUrl" : "https://roost.ai/hubfs/Videos/Rishi-Yadav-no-more-static-staging-sites.mp4", "description" : "The primary benefits of ephemeral environments are to speed up code release velocity and reduce cloud costs.", "duration" : "PT1M34S", "name" : "No more static QA staging environments and Hello Roost ephemeral pre-production environments", "thumbnailUrl" : "https://roost.ai/hs-fs/hubfs/custom-video-thumbnails/Rish-Yadav-no-more-static-stagic-sites-thumb-2-1.jpeg" } ```