Razorcat: Buy in India
Authorized India Partner · GSAS Micro Systems
Razorcat × GSAS
Razorcat Development GmbH (Berlin, Germany) is the developer of TESSY, the industry-standard automated dynamic unit testing tool for embedded C and C++ software. TESSY provides the complete unit, module, and integration testing workflow with full code coverage measurement, statement, branch, decision, MC/DC, and modified condition combination (MCC), meeting the verification requirements of ISO 26262, IEC 61508, DO-178C, IEC 62279, and ISO 13849.
TESSY automates the three most labour-intensive parts of embedded testing: interface analysis (parsing function signatures to determine inputs and outputs), test driver generation (creating the harness code), and stub function creation (replacing called functions with controllable substitutes). The Classification Tree Editor (CTM) enables systematic test case design, and ReqIF import/export provides bidirectional requirements traceability for safety audits. TESSY integrates with all major embedded compilers (Arm Keil, IAR, TASKING, HighTec, GCC) and CI/CD platforms (Jenkins, GitLab, Azure DevOps).
GSAS Micro Systems is India's authorized Razorcat partner, providing hands-on TESSY onboarding training, CI/CD integration consulting, application engineering, and ongoing technical support for teams in Bengaluru, Hyderabad, Chennai, Pune, Mumbai, and Delhi NCR building safety-critical automotive ECUs, aerospace flight computers, medical devices, and industrial controllers. TESSY integrates with other GSAS-supplied tools: Arm Keil MDK for compilation, SEGGER J-Link for on-target debug, and Perforce Helix QAC for MISRA static analysis, forming a complete verification stack for ISO 26262 projects.
Latest Insights
Shift-Left for Safety-Critical Code: Perforce QAC Static Analysis + Razorcat TESSY Dynamic Testing for MISRA, IEC 62304 and FDA Compliance in India
5 Jun 2026
From Manual to Automated: Why Indian Automotive Tier-1s Are Adopting TESSY for Unit Testing
31 Mar 2026
ISO 26262 Part 6 Unit Testing Requirements: A Practical Checklist Mapped to TESSY Capabilities
31 Mar 2026
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TESSY: Automated Unit Testing for Safety-Critical Embedded Software
TESSY automates unit, module, and integration testing for embedded C and C++ with full code coverage measurement, statement, branch, decision, MC/DC, and MCC. Qualified for ISO 26262, IEC 61508, DO-178C, and IEC 62279, TESSY is the testing backbone for safety-critical projects across automotive, industrial, and aerospace.
TESSY handles the entire testing workflow: automatic interface analysis parses function signatures, test drivers are generated without manual harness writing, and stub functions replace called functions with controllable substitutes. The Classification Tree Editor enables systematic test case design that satisfies ISO 26262 Part 6 requirements, and ReqIF import/export provides bidirectional requirements traceability for auditor review.
Works With Your Existing Toolchain
TESSY integrates with the tools Indian engineering teams already use:
SEGGER J-Link
On-target unit testing via J-Link debug probe for real hardware validation
View SEGGER tools →Perforce Helix QAC
MISRA C static analysis + TESSY MC/DC dynamic testing = complete ISO 26262 verification
View Perforce tools →Why Buy TESSY from GSAS India
GSAS Micro Systems is India’s authorized Razorcat partner. We provide TESSY licensing with INR invoicing, onboarding training, CI/CD integration consulting (Jenkins, GitLab, Azure DevOps), and ongoing technical support. Our functional safety engineers in Bengaluru, Hyderabad, Chennai, Pune, Mumbai, and Delhi NCR help automotive, aerospace, and industrial teams deploy TESSY into their existing development workflows and achieve the MC/DC coverage levels required by ISO 26262, IEC 61508, and DO-178C.
For two-wheeler and EV motor controller teams, TESSY provides the ASIL-compliant unit testing framework that Indian OEMs increasingly require for inverter firmware, battery management, and chassis control software.
Why GSAS
Why Choose GSAS as Your Razorcat Engineering Partner
2026
Razorcat Partnership
MC/DC
Full Coverage Metrics
ISO 26262
ASIL A-D Qualified
- Authorized Razorcat partner, TESSY unit testing licensing + training in India
- Application engineering: TESSY integration with Arm Keil MDK, SEGGER J-Link, AURIX MCAL
- Compliance consulting: ISO 26262 Part 6, IEC 61508 Part 3, DO-178C tool qualification
- CI/CD integration support: Jenkins, GitLab CI, Azure DevOps pipeline setup with TESSY
- Local onboarding for automotive, aerospace, and industrial safety projects
- Demo licenses available across Bengaluru, Hyderabad, Chennai, Pune, Mumbai, Delhi NCR
- Local procurement: INR invoicing on TESSY licenses with GeM, SAP Ariba, Coupa, and TReDS support
Razorcat's India design and customer footprint clusters in Bengaluru, India's largest embedded systems and semiconductor design hub. Read our Bengaluru engineering ecosystem guide →
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Look Back at Electronica 2025: Introducing Tessy E25 Automated Unit Testing Tool
Software Failure = Safety Risk: Why Software Testing Is Critical
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Razorcat Insights
Shift-Left for Safety-Critical Code: Perforce QAC Static Analysis + Razorcat TESSY Dynamic Testing for MISRA, IEC 62304 and FDA Compliance in India
Run Perforce QAC static analysis first to enforce MISRA and clean the code, then Razorcat TESSY for dynamic unit testing and MC/DC coverage. Together they form a complete shift-left toolchain for IEC 62304 medical-device and FDA-regulated software, both from one authorized engineering partner in India, GSAS Micro Systems.
From Manual to Automated: Why Indian Automotive Tier-1s Are Adopting TESSY for Unit Testing
How Indian automotive Tier-1 suppliers are transitioning from manual unit testing to automated tools like Razorcat TESSY, driven by ISO 26262 requirements, OEM audit expectations, and the scaling demands of AUTOSAR-based multi-platform ECU development.
ISO 26262 Part 6 Unit Testing Requirements: A Practical Checklist Mapped to TESSY Capabilities
ISO 26262 Part 6 governs software unit design and implementation.
SEGGER and Razorcat Partnership: What It Means for Indian Embedded Teams
The SEGGER and Razorcat partnership brings together SEGGER Embedded Studio, J-Link debug probes, and TESSY unit testing, creating an integrated embedded development and verification workflow available in India through GSAS.
TESSY 5.x: Test Cockpit, Code Access, Hyper Coverage, and Variant Management
What's new in Razorcat TESSY 5.x, the Test Cockpit for project-wide oversight, Code Access for runtime variable inspection, Hyper Coverage for MC/DC gap analysis, and variant management for multi-configuration testing.
TESSY + Arm Keil MDK: Compile with AC6, Test with TESSY, Full Cortex-M Coverage
How to integrate Razorcat TESSY with Arm Keil MDK for automated unit testing of Cortex-M firmware, using Arm Compiler 6 for compilation, TESSY for MC/DC coverage, and a complete CI/CD workflow.
TESSY on Infineon AURIX TC3xx: Unit Testing Safety-Critical Motor Control and Powertrain Firmware
How Razorcat TESSY supports unit testing on Infineon AURIX TC3xx, TriCore compilation with TASKING/HighTec, on-target execution via J-Link, MC/DC coverage for ASIL D powertrain ECUs, and AUTOSAR SWC testing.
Getting Started with TESSY: Install, Import C Module, First Test Case, Coverage Report in 15 Minutes
A step-by-step tutorial for getting started with Razorcat TESSY, installing the tool, importing a C module, creating your first test case, running it, and viewing the coverage report. Covers the core workflow in 15 minutes.
MC/DC Coverage Explained: What It Is, Why You Need It, and How TESSY Achieves 100%
A practical guide to Modified Condition/Decision Coverage (MC/DC), the structural coverage metric required by ISO 26262 ASIL D and DO-178C DAL A. Explains what MC/DC measures, why it matters, and how Razorcat TESSY helps engineers achieve 100%.
TESSY + Helix QAC: MISRA Static Analysis + MC/DC Dynamic Testing for Complete ISO 26262 Verification
ISO 26262 Part 6 does not ask for a choice between static analysis and dynamic testing.
TESSY + SEGGER J-Link: Debug-Assisted On-Target Unit Testing for Embedded Safety Projects
How Razorcat TESSY uses SEGGER J-Link debug probes for on-target unit test execution, downloading test harnesses to the microcontroller, collecting coverage data through the debug channel, and achieving MC/DC coverage on real hardware.
TESSY Unit Testing for Embedded C/C++: MC/DC Coverage, ISO 26262 Qualification, and CI/CD Integration
Unit testing embedded software is fundamentally different from unit testing a web application or a desktop service.
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