Use TempDir() in CapturedStream on all non‐Windows platforms
#4837
+39
−55
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We can drop `EndsWithPathSeparator()` because `TempDir()` provides this as an API contract. We prefer `$TEST_TMPDIR` when set for consistency with other platforms.
This is more consistent and makes tests using output capture behave as expected in environments with custom values of `$TEST_TMPDIR` or `$TMPDIR`, including fixing them in ones where `/tmp` may not be accessible, such as sandboxed build environments on macOS.
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This is more consistent and makes tests using output capture behave as expected in environments with custom values of
$TEST_TMPDIRor$TMPDIR, including fixing them in ones where/tmpmay not be accessible, such as sandboxed build environments on macOS.