更新

TongjiUniApp/node_modules/@jimp/plugin-threshold/test/threshold.test.js

@@ -0,0 +1,30 @@
+import { Jimp, getTestDir } from '@jimp/test-utils';
+import configure from '@jimp/custom';
+import jpeg from '@jimp/jpeg';
+import color from '@jimp/plugin-color';
+import resize from '@jimp/plugin-resize';
+
+import threshold from '../src';
+
+const jimp = configure(
+  { types: [jpeg], plugins: [threshold, color, resize] },
+  Jimp
+);
+
+describe('Threshold', function() {
+  this.timeout(15000);
+
+  it('defines default threshold for lighter backgrounds', async () => {
+    const expectedImage = await jimp.read(
+      getTestDir(__dirname) + '/images/hands_mx200_rp255.jpg'
+    );
+    const testImage = await jimp.read(
+      getTestDir(__dirname) + '/images/hands.jpg'
+    );
+
+    testImage
+      .threshold({ max: 200, replace: 255 })
+      .hash()
+      .should.be.equal(expectedImage.hash());
+  });
+});