pytest integration
inline-snapshot provides one pytest option with different flags (create, fix, trim, update, short-report, report, disable).
Snapshot comparisons return always True if you use one of the flags create, fix or review.
This is necessary because the whole test needs to be run to fix all snapshots like in this case:
from inline_snapshot import snapshot
def test_something():
assert 1 == snapshot(5)
assert 2 <= snapshot(5)
Note
Every flag with the exception of disable and short-report disables the pytest assert-rewriting.
--inline-snapshot=create,fix,trim,update¶
Approve the changes of the given category. These flags can be combined with report and review.
test_something.py
from inline_snapshot import snapshot
def test_something():
assert 1 == snapshot()
assert 2 <= snapshot(5)
> pytest test_something.py --inline-snapshot=create,report
============================= test session starts ==============================
platform linux -- Python 3.12.3, pytest-8.4.1, pluggy-1.6.0
rootdir: /tmp/tmp.pvMbJJAQH9
plugins: inline-snapshot-0.26.0
collected 1 item
test_something.py .E [100%]
═══════════════════════════════ inline-snapshot ════════════════════════════════
─────────────────────────────── Create snapshots ───────────────────────────────
╭───────────────────────────── test_something.py ──────────────────────────────╮
│ @@ -2,5 +2,5 @@ │
│ │
│ │
│ │
│ def test_something(): │
│ - assert 1 == snapshot() │
│ + assert 1 == snapshot(1) │
│ assert 2 <= snapshot(5) │
╰──────────────────────────────────────────────────────────────────────────────╯
These changes will be applied, because you used ]8;id=644376;https://15r10nk.github.io/inline-snapshot/latest/categories/#create\create]8;;\
──────────────────────────────── Trim snapshots ────────────────────────────────
╭───────────────────────────── test_something.py ──────────────────────────────╮
│ @@ -3,4 +3,4 @@ │
│ │
│ │
│ def test_something(): │
│ assert 1 == snapshot(1) │
│ - assert 2 <= snapshot(5) │
│ + assert 2 <= snapshot(2) │
╰──────────────────────────────────────────────────────────────────────────────╯
These changes are not applied.
Use --inline-snapshot=]8;id=334497;https://15r10nk.github.io/inline-snapshot/latest/categories/#trim\trim]8;;\ to apply them, or use the interactive mode with
--inline-snapshot=]8;id=916143;https://15r10nk.github.io/inline-snapshot/latest/pytest/#-inline-snapshotreview\review]8;;\
INFO: inline-snasphot can not trim your external snapshots, because there is no
tests/ folder in your repository root and no test-dir defined in your
pyproject.toml.
==================================== ERRORS ====================================
_____________________ ERROR at teardown of test_something ______________________
your snapshot is missing one value.
If you just created this value with --snapshot=create, the value is now created and you can ignore this message.
=========================== short test summary info ============================
ERROR test_something.py::test_something - Failed: your snapshot is missing one value.
========================== 1 passed, 1 error in 0.12s ==========================
--inline-snapshot=short-report¶
give a short report over which changes can be made to the snapshots
> pytest test_something.py --inline-snapshot=short-report
============================= test session starts ==============================
platform linux -- Python 3.12.3, pytest-8.4.1, pluggy-1.6.0
rootdir: /tmp/tmp.D0w4WXbXWq
plugins: inline-snapshot-0.26.0
collected 1 item
test_something.py .E [100%]
═══════════════════════════════ inline-snapshot ════════════════════════════════
Info: one snapshot can be trimmed (--inline-snapshot=trim)
Error: one snapshot is missing a value (--inline-snapshot=create)
You can also use --inline-snapshot=review to approve the changes interactively
==================================== ERRORS ====================================
_____________________ ERROR at teardown of test_something ______________________
your snapshot is missing one value.
If you just created this value with --snapshot=create, the value is now created and you can ignore this message.
=========================== short test summary info ============================
ERROR test_something.py::test_something - Failed: your snapshot is missing one value.
========================== 1 passed, 1 error in 0.09s ==========================
Info
short-report exists mainly to show that snapshots have changed with enabled pytest assert-rewriting. This option will be replaced with report when this restriction is lifted.
--inline-snapshot=report¶
Shows a diff report over which changes can be made to the snapshots
> pytest test_something.py --inline-snapshot=report
============================= test session starts ==============================
platform linux -- Python 3.12.3, pytest-8.4.1, pluggy-1.6.0
rootdir: /tmp/tmp.QJhpw2KSLx
plugins: inline-snapshot-0.26.0
collected 1 item
test_something.py .E [100%]
═══════════════════════════════ inline-snapshot ════════════════════════════════
─────────────────────────────── Create snapshots ───────────────────────────────
╭───────────────────────────── test_something.py ──────────────────────────────╮
│ @@ -2,5 +2,5 @@ │
│ │
│ │
│ │
│ def test_something(): │
│ - assert 1 == snapshot() │
│ + assert 1 == snapshot(1) │
│ assert 2 <= snapshot(5) │
╰──────────────────────────────────────────────────────────────────────────────╯
These changes are not applied.
Use --inline-snapshot=]8;id=617020;https://15r10nk.github.io/inline-snapshot/latest/categories/#create\create]8;;\ to apply them, or use the interactive mode with
--inline-snapshot=]8;id=451879;https://15r10nk.github.io/inline-snapshot/latest/pytest/#-inline-snapshotreview\review]8;;\
──────────────────────────────── Trim snapshots ────────────────────────────────
╭───────────────────────────── test_something.py ──────────────────────────────╮
│ @@ -3,4 +3,4 @@ │
│ │
│ │
│ def test_something(): │
│ assert 1 == snapshot() │
│ - assert 2 <= snapshot(5) │
│ + assert 2 <= snapshot(2) │
╰──────────────────────────────────────────────────────────────────────────────╯
These changes are not applied.
Use --inline-snapshot=]8;id=274714;https://15r10nk.github.io/inline-snapshot/latest/categories/#trim\trim]8;;\ to apply them, or use the interactive mode with
--inline-snapshot=]8;id=656708;https://15r10nk.github.io/inline-snapshot/latest/pytest/#-inline-snapshotreview\review]8;;\
INFO: inline-snasphot can not trim your external snapshots, because there is no
tests/ folder in your repository root and no test-dir defined in your
pyproject.toml.
==================================== ERRORS ====================================
_____________________ ERROR at teardown of test_something ______________________
your snapshot is missing one value.
If you just created this value with --snapshot=create, the value is now created and you can ignore this message.
=========================== short test summary info ============================
ERROR test_something.py::test_something - Failed: your snapshot is missing one value.
========================== 1 passed, 1 error in 0.11s ==========================
--inline-snapshot=review¶
Shows a diff report for each category and ask if you want to apply the changes
> pytest test_something.py --inline-snapshot=review
============================= test session starts ==============================
platform linux -- Python 3.12.3, pytest-8.4.1, pluggy-1.6.0
rootdir: /tmp/tmp.Ip8GxkwakR
plugins: inline-snapshot-0.26.0
collected 1 item
test_something.py .E [100%]
═══════════════════════════════ inline-snapshot ════════════════════════════════
─────────────────────────────── Create snapshots ───────────────────────────────
╭───────────────────────────── test_something.py ──────────────────────────────╮
│ @@ -2,5 +2,5 @@ │
│ │
│ │
│ │
│ def test_something(): │
│ - assert 1 == snapshot() │
│ + assert 1 == snapshot(1) │
│ assert 2 <= snapshot(5) │
╰──────────────────────────────────────────────────────────────────────────────╯
Do you want to ]8;id=464006;https://15r10nk.github.io/inline-snapshot/latest/categories/#create\create]8;;\ these snapshots? [y/n] (n):
──────────────────────────────── Trim snapshots ────────────────────────────────
╭───────────────────────────── test_something.py ──────────────────────────────╮
│ @@ -3,4 +3,4 @@ │
│ │
│ │
│ def test_something(): │
│ assert 1 == snapshot(1) │
│ - assert 2 <= snapshot(5) │
│ + assert 2 <= snapshot(2) │
╰──────────────────────────────────────────────────────────────────────────────╯
Do you want to ]8;id=840009;https://15r10nk.github.io/inline-snapshot/latest/categories/#trim\trim]8;;\ these snapshots? [y/n] (n):
INFO: inline-snasphot can not trim your external snapshots, because there is no
tests/ folder in your repository root and no test-dir defined in your
pyproject.toml.
==================================== ERRORS ====================================
_____________________ ERROR at teardown of test_something ______________________
your snapshot is missing one value.
If you just created this value with --snapshot=create, the value is now created and you can ignore this message.
=========================== short test summary info ============================
ERROR test_something.py::test_something - Failed: your snapshot is missing one value.
========================== 1 passed, 1 error in 0.11s ==========================
--inline-snapshot=disable¶
Disables all the snapshot logic. snapshot(x) will just return x and inline-snapshot will not be able to fix snapshots or to generate reports.
This can be used if you think that snapshot logic causes a problem in your tests. It is also the default for CI runs.
deprecation
This option was previously called --inline-snapshot-disable