From e3db18c5aaddd13c8d8c1a5913bcf2600526abed Mon Sep 17 00:00:00 2001
From: Valentin Boussot <valentin@fideus.io>
Date: Tue, 25 Aug 2026 01:39:06 +0200
Subject: [PATCH] fix(itk-wasm): spell TimeVaryingVelocityField
 parameterizations with the y

The TransformParameterizations table spelled two entries
TimeVaringVelocityField and GaussianSmoothingOnUpdateTimeVaringVelocityField,
both as key and as value. Everywhere else the name carries the y: the
JSONTransformParameterizationEnum in itkTransformJSON.h, the C++ class names
the serializer matches on, and the Python itkwasm TransformParameterizations
enum. A TypeScript consumer comparing transformParameterization against any
of those never matched these two entries.

Correct the four spellings and add a test that every value is its own key
and that the two time-varying entries match the ITK class names.

Closes #1591
---
 .../transform-parameterizations.ts            |  6 +++---
 .../transform-parameterizations-test.js       | 20 +++++++++++++++++++
 2 files changed, 23 insertions(+), 3 deletions(-)
 create mode 100644 packages/core/typescript/itk-wasm/test/node/interface-types/transform-parameterizations-test.js

diff --git a/packages/core/typescript/itk-wasm/src/interface-types/transform-parameterizations.ts b/packages/core/typescript/itk-wasm/src/interface-types/transform-parameterizations.ts
index 5c059073d..b3c876a83 100644
--- a/packages/core/typescript/itk-wasm/src/interface-types/transform-parameterizations.ts
+++ b/packages/core/typescript/itk-wasm/src/interface-types/transform-parameterizations.ts
@@ -27,9 +27,9 @@ const TransformParameterizations = {
     'GaussianSmoothingOnUpdateDisplacementField',
   GaussianExponentialDiffeomorphic: 'GaussianExponentialDiffeomorphic',
   VelocityField: 'VelocityField',
-  TimeVaringVelocityField: 'TimeVaringVelocityField',
-  GaussianSmoothingOnUpdateTimeVaringVelocityField:
-    'GaussianSmoothingOnUpdateTimeVaringVelocityField'
+  TimeVaryingVelocityField: 'TimeVaryingVelocityField',
+  GaussianSmoothingOnUpdateTimeVaryingVelocityField:
+    'GaussianSmoothingOnUpdateTimeVaryingVelocityField'
 } as const
 
 export default TransformParameterizations
diff --git a/packages/core/typescript/itk-wasm/test/node/interface-types/transform-parameterizations-test.js b/packages/core/typescript/itk-wasm/test/node/interface-types/transform-parameterizations-test.js
new file mode 100644
index 000000000..da182168c
--- /dev/null
+++ b/packages/core/typescript/itk-wasm/test/node/interface-types/transform-parameterizations-test.js
@@ -0,0 +1,20 @@
+import test from 'ava'
+
+import { TransformParameterizations } from '../../../dist/index-node.js'
+
+test('every parameterization value is its own key', (t) => {
+  for (const [key, value] of Object.entries(TransformParameterizations)) {
+    t.is(value, key)
+  }
+})
+
+test('time-varying velocity field parameterizations match the ITK class names', (t) => {
+  t.is(TransformParameterizations.TimeVaryingVelocityField, 'TimeVaryingVelocityField')
+  t.is(
+    TransformParameterizations.GaussianSmoothingOnUpdateTimeVaryingVelocityField,
+    'GaussianSmoothingOnUpdateTimeVaryingVelocityField'
+  )
+  for (const key of Object.keys(TransformParameterizations)) {
+    t.false(key.includes('Varing'))
+  }
+})