# PR#144: Tests in One Locale

> **WARNING:** This document describes only the change applied in this PR.
> It may already be outdated once the next PR is merged.
> Historic PR-documentation is not maintained along with new PRs — treat it as a snapshot, not as current documentation.

## The Problem

The tests ran in whatever locale the host had, and so did the processes they start, bash and git among them.
On a host with a German `LC_NUMERIC`, bash writes `EPOCHREALTIME` as `1791625756,465101`; `$((…))` reads the comma as its comma operator.
That made a test of PR#143 fail locally, while it would have passed on another host.

## Non-Goals

- No change to the locale of Werkator itself or of the builds it runs.

## The Scenarios

#### Scenario#144.01: Tests run in the US English locale

- **Given** a host with another locale, e.g. a German `LC_NUMERIC`
- **When** a test runs, under Gradle or under PIT
- **Then** the test and the processes it starts use `en_US.UTF-8`
- **So that** a test that formats or parses numbers, dates or messages behaves the same on every host.

##### Verified by

- [TestLocaleIntegrationTest](../../src/test/kotlin/de/hoennig/werkator/framework/TestLocaleIntegrationTest.kt)

## The Solution

- Every `Test` task sets `LANG` and `LC_ALL` to `en_US.UTF-8`, and `user.language` and `user.country` to `en` and `US`.
- The `pitest` task sets the same environment for its main process; PIT's test processes inherit it.