interval-guided-regression-test-update

Automatically updates regression tests based on interval analysis to maintain coverage of key program intervals. Use when code changes affect value ranges, conditionals, or control flow, and existing tests need updating to maintain interval coverage. Analyzes interval information from updated code, identifies coverage gaps, adjusts test inputs and assertions, removes redundant tests, and generates new tests for uncovered intervals. Supports Python, Java, JavaScript, and C/C++ with various test frameworks (pytest, JUnit, Jest, Google Test).

0.92x

Quality

71%

Does it follow best practices?

Impact

88%

0.92x

Average score across 3 eval scenarios

Securityby

Passed

No known issues

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Evaluation results

100%

Weather Station Alert System — Test Suite Update

Interval split — new interval test generation

Criteria

Without context

With context

New extreme_cold test added

100%

Correct assertion for extreme_cold

100%

Freezing test retained

100%

Unaffected tests preserved

100%

Coverage report produced

100%

Before Update section in report

100%

After Update section in report

100%

Test Changes section in report

100%

Correct interval count after update

100%

100% coverage reported

100%

Descriptive test name

100%

Added tests count correct

100%

65%

-29%

Parcel Logistics Platform — Shipping Rate Test Update

Boundary shift — input and assertion adjustment

Criteria

Without context

With context

heavy parcel assertion fixed

100%

very heavy parcel assertion fixed

100%

light parcel test unchanged

100%

medium parcel test unchanged

100%

New test for tier 4 interval

100%

50%

Coverage report produced

100%

Before Update section

80%

100%

After Update section

80%

100%

Test Changes section — modified count

100%

100% coverage after update

60%

100%

Modified tests count only affected tests

100%

Boundary shift analysis documented

100%

Age-Gated Content Platform — Access Control Test Update

Interval merge — redundant test removal and assertion update

Criteria

Without context

With context

Redundant test removed

100%

Kept minor test assertion updated

100%

testAdult preserved unchanged

100%

testSenior preserved unchanged

100%

testInvalidAge preserved

100%

Coverage report produced

100%

Before Update interval count

40%

100%

After Update interval count

100%

Test Changes — removed count

100%

100% coverage after update

100%

JUnit @Test annotations retained

100%

Repository: ArabelaTso/Skills-4-SE
Commit: 0f00a4f

Evaluated: 29 days ago
Agent: Claude Code
Model: Claude Sonnet 4.6

Table of Contents

Weather Station Alert System — Test Suite Update Parcel Logistics Platform — Shipping Rate Test Update Age-Gated Content Platform — Access Control Test Update

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