make Component.remap_layers safe

[joamatab]

• make Component.remap_layers safe
• add test for remap_layers

#1238

@bradley-w-snyder

[sourcery-ai]

Sourcery Code Quality Report

✅  Merging this PR will increase code quality in the affected files by 0.06%.

Quality metrics	Before	After	Change
Complexity	12.55 🙂	12.31 🙂	-0.24 👍
Method Length	84.15 🙂	84.11 🙂	-0.04 👍
Working memory	10.63 😞	10.61 😞	-0.02 👍
Quality	56.63% 🙂	56.69% 🙂	0.06% 👍

Other metrics	Before	After	Change
Lines	3692	3689	-3

Changed files	Quality Before	Quality After	Quality Change
gdsfactory/component.py	65.47% 🙂	65.42% 🙂	-0.05% 👎
gdsfactory/path.py	43.66% 😞	43.81% 😞	0.15% 👍

Here are some functions in these files that still need a tune-up:

File	Function	Complexity	Length	Working Memory	Quality	Recommendation
gdsfactory/path.py	extrude	87 ⛔	1011 ⛔	28 ⛔	1.56% ⛔	Refactor to reduce nesting. Try splitting into smaller methods. Extract out complex expressions
gdsfactory/path.py	transition	22 😞	450 ⛔	20 ⛔	18.98% ⛔	Refactor to reduce nesting. Try splitting into smaller methods. Extract out complex expressions
gdsfactory/component.py	Component._write_library	20 😞	356 ⛔	18 ⛔	23.01% ⛔	Refactor to reduce nesting. Try splitting into smaller methods. Extract out complex expressions
gdsfactory/component.py	flatten_invalid_refs_recursive	20 😞	325 ⛔		27.26% 😞	Refactor to reduce nesting. Try splitting into smaller methods
gdsfactory/path.py	euler	11 🙂	503 ⛔	20 ⛔	27.31% 😞	Try splitting into smaller methods. Extract out complex expressions

Legend and Explanation

The emojis denote the absolute quality of the code:

• ⭐ excellent
• 🙂 good
• 😞 poor
• ⛔ very poor

The 👍 and 👎 indicate whether the quality has improved or gotten worse with this pull request.

---

Please see our documentation here for details on how these metrics are calculated.

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Help us improve this quality report!

[codecov]

Codecov Report

Merging #1240 (051d74e) into main (6012cdd) will increase coverage by 0.08%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main    #1240      +/-   ##
==========================================
+ Coverage   68.57%   68.66%   +0.08%     
==========================================
  Files         354      354              
  Lines       21071    21070       -1     
  Branches     3034     3033       -1     
==========================================
+ Hits        14450    14467      +17     
+ Misses       5767     5750      -17     
+ Partials      854      853       -1     

Impacted Files	Coverage Δ
gdsfactory/path.py	73.15% <ø> (-0.09%)	⬇️
gdsfactory/component.py	68.25% <100.00%> (+1.89%)	⬆️

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