From 050433a359948f3000e0b7bedaa00dc199d03029 Mon Sep 17 00:00:00 2001
From: Frank Hoffmann <15r10nk-git@polarbit.de>
Date: Wed, 19 Jul 2023 19:24:31 +0200
Subject: [PATCH] refactor(wip): implement update correct

---
 inline_snapshot/_inline_snapshot.py | 32 +++++++++++++----------------
 tests/test_inline_snapshot.py       |  7 ++-----
 2 files changed, 16 insertions(+), 23 deletions(-)

diff --git a/inline_snapshot/_inline_snapshot.py b/inline_snapshot/_inline_snapshot.py
index 40043d16..65f4b2b0 100644
--- a/inline_snapshot/_inline_snapshot.py
+++ b/inline_snapshot/_inline_snapshot.py
@@ -199,13 +199,7 @@ def _needs_fix(self):
         return not self.cmp(self._old_value, self._new_value)
 
     def get_result(self, flags):
-        if (
-            flags.fix
-            and flags.trim
-            or flags.create
-            and self._old_value == undefined
-            or flags.update
-        ):
+        if flags.create and self._needs_create():
             return self._new_value
 
         if flags.fix and self._needs_fix():
@@ -289,10 +283,8 @@ def _needs_fix(self):
         return any(item not in self._old_value for item in self._new_value)
 
     def get_result(self, flags):
-        if (
-            (flags.fix and flags.trim)
-            or (flags.create and self._old_value is undefined)
-            or flags.update
+        if (flags.fix and self._needs_fix() and flags.trim and self._needs_trim()) or (
+            flags.create and self._needs_create()
         ):
             return self._new_value
 
@@ -538,7 +530,6 @@ def _change(self):
 
         if (
             _update_flags.update
-            and not (needs_fix or needs_create or needs_trim)
             or _update_flags.fix
             and needs_fix
             or _update_flags.create
@@ -559,11 +550,16 @@ def _change(self):
             )
 
     def _current_tokens(self):
-        return [
-            (t.type, t.string)
-            for t in self._expr.source.asttokens().get_tokens(self._expr.node.args[0])
-            if t.type not in ignore_tokens
-        ]
+        if not self._expr.node.args:
+            return []
+        else:
+            return [
+                (t.type, t.string)
+                for t in self._expr.source.asttokens().get_tokens(
+                    self._expr.node.args[0]
+                )
+                if t.type not in ignore_tokens
+            ]
 
     @property
     def _flags(self):
@@ -576,7 +572,7 @@ def _flags(self):
             s.add("create")
 
         if (
-            not s
+            "create" not in s
             and self._expr is not None
             and self._current_tokens() != self._value_to_token(self._value._old_value)
         ):
diff --git a/tests/test_inline_snapshot.py b/tests/test_inline_snapshot.py
index 98009abe..f01732ec 100644
--- a/tests/test_inline_snapshot.py
+++ b/tests/test_inline_snapshot.py
@@ -225,13 +225,9 @@ def gen_code(ops, fixed):
 
         return code
 
-    all_flags = {op.flag for op in ops}
-
     s = source(gen_code(ops, {}))
 
-    reported_flags = all_flags
-    if "update" in reported_flags and len(reported_flags) > 1:
-        reported_flags -= {"update"}
+    reported_flags = {op.flag for op in ops}
 
     assert s.flags == reported_flags
 
@@ -241,6 +237,7 @@ def gen_code(ops, fixed):
             fixed_flags = set()
             for flag in flags:
                 if flag in {"create", "fix", "trim"}:
+                    # sub-snapshots are always updated if the snapshot is changed
                     fixed_flags.add("update")
 
                 s2 = s2.run(flag)