Testing MuleSoft Integrations (Course #testing-integrations)

Programme every line is something you do

6 modules · 18 topics · in course-flow order

1. Module 1

   Structure the test pyramid

   Objective. Arbitrate what gets verified at each pyramid level and deliver a risk-ranked test matrix per API.

   • Map unit, integration and E2E levels onto an API-led estate, targeting a 70/20/10 effort split
   • Weight each flow's error routes by incident frequency to decide which get tests first
   • Flag inverted-pyramid anti-patterns using coverage-vs-runtime ratios (suites slower than 5 min)
2. Module 2

   Gate flows with MUnit

   Objective. Instrument flows with MUnit connector mocks and spies until ≥ 80% of error routes are covered, proven by a suite report.

   • Author MUnit suites with connector mocks, flow spies and payload assertions (coverage target: ≥ 80%)
   • Cover every error-handler branch, including reconnection paths, with mocked connectors and dynamic ports
   • Parameterize MUnit tests with input sets so one suite validates many mappings without duplication
3. Module 3

   Break the build on regression

   Objective. Wire MUnit into CI and publish coverage evidence that fails builds below the agreed threshold.

   • Run MUnit via Maven in the pipeline and publish per-module coverage reports (gate: fail under 80%)
   • Configure coverage gates plus a flaky-test quarantine rule (max 1 automatic retry per suite)
   • Version test suites next to RAML/OAS specs so any spec change updates contract tests in the same PR
4. Module 4

   Test by contract, not by hope

   Objective. Drive Postman and SoapUI suites from the mocking service and prove conformance to the published spec.

   • Generate Postman collections from OAS/RAML specs and execute them against the mocking service
   • Assert status codes, headers and error contracts per endpoint, down to 4xx payload schemas
   • Isolate dev/test sandboxes with environment variables and secrets so one collection runs anywhere
5. Module 5

   Load until it hurts

   Objective. Quantify throughput ceilings with ramp-and-soak profiles and name the top bottleneck of each run.

   • Script load profiles with JMeter or k6: ramp 0→200 TPS, then a 30-minute soak on non-prod
   • Read p95/p99 latency, error rate and GC pauses to tell saturation apart from memory leaks
   • Attribute bottlenecks to connection pools, thread counts or a 300 ms downstream call budget
6. Module 6

   Deterministic or useless

   Objective. Eliminate flakiness with mocked externals, controlled fixtures and idempotent, repeatable runs.

   • Stub external systems so no test ever reaches a live PSP, CRM or mainframe
   • Seed and reset test data per run (fixtures, teardown scripts) to guarantee repeatable executions
   • Quarantine flaky tests behind a retry budget (≤ 2 retries) and track a burn-down to zero

References & Official Documentation every claim above has a source

Module 1

• MUnit OverviewMuleSoft Docs

Module 2

• Mock When Event ProcessorMuleSoft Docs
• Parameterized MUnit Test SuitesMuleSoft Docs
• Spy Event ProcessorMuleSoft Docs

Module 3

• Maven Configuration for CoverageMuleSoft Docs

Module 4

• Simulate API Calls with the Mocking ServiceMuleSoft Docs

Module 5

• Performance Test ValidationsMuleSoft Docs

Module 6

• Dynamic PortsMuleSoft Docs

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