test(compare-images): add node/compare-double-images-test.js

Author: thewtex

packages/compare-images/python/itkwasm-compare-images-wasi/test/test_compare_double_images.py

@@ -18,7 +18,6 @@ def test_compare_double_images():
     baseline_image = Image(**baseline_dict)
 
     metrics, difference_image, difference_image_rendering = compare_double_images(test_image, baseline_images=[baseline_image])
-    print(metrics)
 
     assert metrics['almostEqual'] == False
     assert metrics['numberOfPixelsWithDifferences'] == 9915

packages/compare-images/typescript/package.json

@@ -14,7 +14,7 @@
   },
   "scripts": {
     "start": "npm run copyShoelaceAssets && vite -c build/vite.config.js",
-    "test": "echo \"Error: no test specified\" && exit 1",
+    "test:node": "ava test/node/*.js",
     "build": "npm run build:tsc && npm run build:node && npm run build:browser && npm run build:demo",
     "build:node": "rollup -c ./build/rollup.node.config.js",
     "build:browser": "rollup -c ./build/rollup.browser.config.js",
@@ -31,7 +31,7 @@
   "author": "",
   "license": "Apache-2.0",
   "dependencies": {
-    "itk-wasm": "^1.0.0-b.119"
+    "itk-wasm": "^1.0.0-b.127"
   },
   "devDependencies": {
     "@rollup/plugin-commonjs": "^24.0.0",
@@ -41,7 +41,9 @@
     "@rollup/plugin-typescript": "^11.1.1",
     "@shoelace-style/shoelace": "^2.5.2",
     "@types/node": "^20.2.5",
+    "ava": "^5.3.1",
     "debug": "^4.3.4",
+    "itk-image-io": "^1.0.0-b.127",
     "rollup": "^3.9.0",
     "rollup-plugin-copy": "^3.4.0",
     "rollup-plugin-ignore": "^1.0.10",

packages/compare-images/typescript/test/node/compare-double-images-test.js

@@ -0,0 +1,29 @@
+import test from 'ava'
+import path from 'path'
+
+import { compareDoubleImagesNode } from '../../dist/bundles/compare-images-node.js'
+import { readImageLocalFile } from 'itk-wasm'
+
+const inputPathPrefix = '../test/data/input/';
+
+test('compareDoubleImagesNode produces the expected metrics and difference images', async t => {
+  const testImageFile = 'cake_easy.iwi.cbor'
+  const testImagePath = path.join(inputPathPrefix, testImageFile)
+  const testImage = await readImageLocalFile(testImagePath)
+
+  const baselineImageFile = 'cake_hard.iwi.cbor'
+  const baselineImagePath = path.join(inputPathPrefix, baselineImageFile)
+  const baselineImage = await readImageLocalFile(baselineImagePath)
+
+  const { metrics, differenceImage, differenceUchar2dImage } = await compareDoubleImagesNode(testImage, { baselineImages: [baselineImage,] })
+
+  t.is(metrics.almostEqual, false)
+  t.is(metrics.numberOfPixelsWithDifferences, 9915)
+  t.is(metrics.minimumDifference, 1.0)
+  t.is(metrics.maximumDifference, 107.0)
+  t.is(metrics.totalDifference, 337334.0)
+  t.is(metrics.meanDifference, 34.02259203227433)
+
+  t.is(differenceImage.imageType.componentType, 'float64')
+  t.is(differenceUchar2dImage.imageType.componentType, 'uint8')
+})