Add tests for cropping

packages/plugin-crop/test/crop.test.js

@@ -0,0 +1,110 @@
+import { Jimp, mkJGD } from '@jimp/test-utils';
+import configure from '@jimp/custom';
+
+import crop from '../src';
+
+const jimp = configure({ plugins: [crop] }, Jimp);
+
+describe('crop', () => {
+  // 6x5 size
+  const testImage = mkJGD(
+    '  ◆◆  ',
+    ' ◆▦▦◆ ',
+    '◆▦▦▦▦◆',
+    ' ◆▦▦◆ ',
+    '  ◆◆  '
+  );
+
+  it('full width from top', async () => {
+    const imgSrc = await jimp.read(testImage);
+
+    imgSrc
+      .crop(0, 0, 6, 2)
+      .getJGDSync()
+      .should.be.sameJGD(
+        mkJGD(
+          '  ◆◆  ',
+          ' ◆▦▦◆ ',
+        )
+      );
+  });
+
+  it('full width from bottom', async () => {
+    const imgSrc = await jimp.read(testImage);
+
+    imgSrc
+      .crop(0, 3, 6, 2)
+      .getJGDSync()
+      .should.be.sameJGD(
+        mkJGD(
+          ' ◆▦▦◆ ',
+          '  ◆◆  '
+        )
+      );
+  });
+
+  it('full width from middle', async () => {
+    const imgSrc = await jimp.read(testImage);
+
+    imgSrc
+      .crop(0, 2, 6, 2)
+      .getJGDSync()
+      .should.be.sameJGD(
+        mkJGD(
+          '◆▦▦▦▦◆',
+          ' ◆▦▦◆ '
+        )
+      );
+  });
+
+  it('full height from left', async () => {
+    const imgSrc = await jimp.read(testImage);
+
+    imgSrc
+      .crop(0, 0, 2, 5)
+      .getJGDSync()
+      .should.be.sameJGD(
+        mkJGD(
+          '  ',
+          ' ◆',
+          '◆▦',
+          ' ◆',
+          '  '
+        )
+      );
+  });
+
+  it('full height from right', async () => {
+    const imgSrc = await jimp.read(testImage);
+
+    imgSrc
+      .crop(4, 0, 2, 5)
+      .getJGDSync()
+      .should.be.sameJGD(
+        mkJGD(
+          '  ',
+          '◆ ',
+          '▦◆',
+          '◆ ',
+          '  '
+        )
+      );
+  });
+
+  it('full height from middle', async () => {
+    const imgSrc = await jimp.read(testImage);
+
+    imgSrc
+      .crop(2, 0, 2, 5)
+      .getJGDSync()
+      .should.be.sameJGD(
+        mkJGD(
+          '◆◆',
+          '▦▦',
+          '▦▦',
+          '▦▦',
+          '◆◆'
+        )
+      );
+  });
+});