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Integration Testing

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Integration testing is performed after a feature has been validated at the functional level and is considered stable in isolation.

The goal of this phase is to verify that the implemented feature works correctly in combination with other system components and does not introduce issues when integrated into the broader system.

Objectives

  • Validate feature interaction with existing functionality
  • Ensure compatibility between system components
  • Identify integration issues and conflicts
  • Verify end-to-end behavior across combined workflows
  • Confirm stability after feature integration

Testing Environment

Integration testing is typically performed in the DEV environment, where multiple features and changes are combined.

QA Activities

flowchart TB
    A["Feature Integration"] --> B["Interaction Validation"]
    B --> C["Workflow Testing"]
    C --> D["Exploratory Integration Testing"]
    D --> E["Issue Identification"]

    subgraph QA Activities Flow
        A
        B
        C
        D
        E
    end

    style A fill:#FFCDD2,color:#000000
    style B fill:#FFD600,color:#000000
    style C fill:#FFE0B2,color:#000000
    style D fill:#FFF9C4,color:#000000
    style E fill:#C8E6C9,color:#000000
During this phase QA performs the following activities:

Interaction Validation - verifying that the new feature correctly interacts with existing system components - validating data flow between integrated modules - ensuring no conflicts between features

Workflow Testing - testing end-to-end user workflows involving multiple features - validating cross-feature scenarios and dependencies - ensuring consistent behavior across system flows

Exploratory Integration Testing - performing exploratory testing focused on feature interaction - identifying unexpected behavior when features are combined - testing edge cases related to integration points

Issue Identification - identifying and documenting integration-related defects - analyzing root causes related to feature interaction - communicating issues to development team

Entry Criteria

Before integration testing begins:

  • Feature passed final feature validation
  • All critical defects resolved
  • Feature deployed in shared environment with other components
  • Environment stable and accessible

Quality Gates

  • All integration scenarios are executed and results are documented
  • Interaction between new and existing functionality is confirmed
  • No critical/blocker integration defects remain
  • End-to-end workflows operate correctly
  • All identified issues are documented and communicated to the team
  • The system is ready for system testing/next stage

Next Steps

Once integration testing is complete:

  • Feature proceeds to System Testing in Pre-Production
  • Feature included in Smoke Testing scope
  • QA confirms readiness for further validation stages

← Previous: Final Feature Validation | Back to Testing Workflow | Next: Smoke Testing →