# Mocha vs unittest

| Attribute | Mocha | unittest |
|---|---|---|
| **Vioscale score** | 70 (43% (low)) | 65.8 (36% (low)) |
| activity.commits_last_30d | 33 | 100 |
| adoption.dependent_repos | 683,562 | 111 |
| adoption.github_stars | 22,905 | 74,928 |
| description.long | A JavaScript test framework that runs on Node.js and in browser environments. It provides flexible test execution with serial runs for accurate error mapping and reporting. | Automates unit test execution with support for setup and teardown code, test organization, and independent test management. Includes test discovery and can be integrated with continuous integration systems. |
| features.capabilities | `{"languages":"JavaScript","assertions":true,"ci_integration":true,"parallel_execution":false}` | `{"mocking":true,"languages":"Python","assertions":true,"test_types":"unit","ci_integration":true}` |
| language.primary | JavaScript | Python |
| license.spdx | MIT | - |
| platform.support | `{"cli":true,"web":true}` | `{"cli":true}` |
| pricing | `{"type":"free","freeTier":true,"sourceUrl":"https://mochajs.org","retrievedAt":"2026-08-03T13:02:12.656Z"}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://docs.python.org/3/library/unittest.html","retrievedAt":"2026-08-03T20:57:19.807Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | free | commercial |
| pricing.price_level | free | free |
| pricing.transparent | yes | yes |
| release.cadence_days | 4 | - |
| release.history | `[{"url":"https://github.com/mochajs/mocha/releases/tag/v12.0.0-rc.6","date":"2026-08-09T17:12:33Z","type":"prerelease","version":"v12.0.0-rc.6"},{"url":"https://github.com/mochajs/mocha/releases/tag/v11.8.0","date":"2026-08-02T19:18:40Z","type":"stable","version":"v11.8.0"},{"url":"https://github.com/mochajs/mocha/releases/tag/v12.0.0-rc.5","date":"2026-07-23T14:57:35Z","type":"prerelease","version":"v12.0.0-rc.5"},{"url":"https://github.com/mochajs/mocha/releases/tag/v12.0.0-rc.4","date":"2026-07-23T13:24:41Z","type":"prerelease","version":"v12.0.0-rc.4"},{"url":"https://github.com/mochajs/mocha/releases/tag/v12.0.0-rc.3","date":"2026-07-23T12:39:55Z","type":"prerelease","version":"v12.0.0-rc.3"},{"url":"https://github.com/mochajs/mocha/releases/tag/v12.0.0-rc.2","date":"2026-07-21T12:03:00Z","type":"prerelease","version":"v12.0.0-rc.2"},{"url":"https://github.com/mochajs/mocha/releases/tag/v12.0.0-rc.1","date":"2026-06-20T15:56:44Z","type":"prerelease","version":"v12.0.0-rc.1"},{"url":"https://github.com/mochajs/mocha/releases/tag/v11.7.7","date":"2026-06-14T13:28:54Z","type":"stable","version":"v11.7.7"},{"url":"https://github.com/mochajs/mocha/releases/tag/v12.0.0-beta-9.6","date":"2026-06-11T01:01:32Z","type":"prerelease","version":"v12.0.0-beta-9.6"},{"url":"https://github.com/mochajs/mocha/releases/tag/v12.0.0-beta-9.5","date":"2026-06-06T19:19:56Z","type":"prerelease","version":"v12.0.0-beta-9.5"},{"url":"https://github.com/mochajs/mocha/releases/tag/v11.7.6","date":"2026-05-18T04:06:46Z","type":"stable","version":"v11.7.6"},{"url":"https://github.com/mochajs/mocha/releases/tag/v12.0.0-beta-9.4","date":"2026-05-16T16:19:46Z","type":"prerelease","version":"v12.0.0-beta-9.4"},{"url":"https://github.com/mochajs/mocha/releases/tag/v12.0.0-alpha-issue-5899.4","date":"2026-05-02T20:51:37Z","type":"prerelease","version":"v12.0.0-alpha-issue-5899.4"},{"url":"https://github.com/mochajs/mocha/releases/tag/v12.0.0-alpha-issue-5899.3","date":"2026-05-02T20:37:48Z","type":"prerelease","version":"v12.0.0-alpha-issue-5899.3"},{"url":"https://github.com/mochajs/mocha/releases/tag/v12.0.0-alpha-issue-5899.2","date":"2026-05-02T20:24:57Z","type":"prerelease","version":"v12.0.0-alpha-issue-5899.2"},{"url":"https://github.com/mochajs/mocha/releases/tag/v12.0.0-alpha-issue-5899.1","date":"2026-05-02T19:54:20Z","type":"prerelease","version":"v12.0.0-alpha-issue-5899.1"},{"url":"https://github.com/mochajs/mocha/releases/tag/v12.0.0-beta-9.3","date":"2026-04-28T00:47:05Z","type":"prerelease","version":"v12.0.0-beta-9.3"},{"url":"https://github.com/mochajs/mocha/releases/tag/v12.0.0-beta-9.2","date":"2026-04-03T02:13:47Z","type":"prerelease","version":"v12.0.0-beta-9.2"},{"url":"https://github.com/mochajs/mocha/releases/tag/v12.0.0-beta-10","date":"2026-02-21T02:57:38Z","type":"prerelease","version":"v12.0.0-beta-10"},{"url":"https://github.com/mochajs/mocha/releases/tag/v12.0.0-beta-9","date":"2026-02-13T17:37:06Z","type":"prerelease","version":"v12.0.0-beta-9"}]` | - |
| security.scorecard | 7.3 | 7.8 |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=mocha&per_page=100","last_12m":0,"max_severity":null}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=nuget&package_name=python&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Testing Tools)

| Capability | Mocha | unittest |
|---|:--:|:--:|
| **Core** |  |  |
| Test types | - | Unit |
| Browser automation | - | - |
| Built-in assertion library | ✓ | ✓ |
| Languages | JavaScript | Python |
| **Isolation** |  |  |
| Mocking / stubbing | - | ✓ |
| **Techniques** |  |  |
| Snapshot testing | - | - |
| **Performance** |  |  |
| Parallel execution | ✗ | - |
| **Insight** |  |  |
| Code coverage | - | - |
| **DX** |  |  |
| Watch mode | - | - |
| **Ops** |  |  |
| CI integration | ✓ | ✓ |

*Source: Vioscale. Generated 2026-09-01T15:17:57.416Z. "-" = undocumented, not absent.*