Add support for pages option for multi-page input #1566

test/unit/gif.js

@@ -0,0 +1,64 @@
+'use strict';
+
+const fs = require('fs');
+const assert = require('assert');
+
+const sharp = require('../../');
+const fixtures = require('../fixtures');
+
+describe('GIF input', () => {
+  it('GIF Buffer to JPEG Buffer', () =>
+    sharp(fs.readFileSync(fixtures.inputGif))
+      .resize(8, 4)
+      .jpeg()
+      .toBuffer({ resolveWithObject: true })
+      .then(({ data, info }) => {
+        assert.strictEqual(true, data.length > 0);
+        assert.strictEqual(data.length, info.size);
+        assert.strictEqual('jpeg', info.format);
+        assert.strictEqual(8, info.width);
+        assert.strictEqual(4, info.height);
+      })
+  );
+
+  it('2 channel GIF file to PNG Buffer', () =>
+    sharp(fixtures.inputGifGreyPlusAlpha)
+      .resize(8, 4)
+      .png()
+      .toBuffer({ resolveWithObject: true })
+      .then(({ data, info }) => {
+        assert.strictEqual(true, data.length > 0);
+        assert.strictEqual(data.length, info.size);
+        assert.strictEqual('png', info.format);
+        assert.strictEqual(8, info.width);
+        assert.strictEqual(4, info.height);
+        assert.strictEqual(4, info.channels);
+      })
+  );
+
+  it('Animated GIF first page to PNG', () =>
+    sharp(fixtures.inputGifAnimated)
+      .toBuffer({ resolveWithObject: true })
+      .then(({ data, info }) => {
+        assert.strictEqual(true, data.length > 0);
+        assert.strictEqual(data.length, info.size);
+        assert.strictEqual('png', info.format);
+        assert.strictEqual(80, info.width);
+        assert.strictEqual(80, info.height);
+        assert.strictEqual(4, info.channels);
+      })
+  );
+
+  it('Animated GIF all pages to PNG "toilet roll"', () =>
+    sharp(fixtures.inputGifAnimated, { pages: -1 })
+      .toBuffer({ resolveWithObject: true })
+      .then(({ data, info }) => {
+        assert.strictEqual(true, data.length > 0);
+        assert.strictEqual(data.length, info.size);
+        assert.strictEqual('png', info.format);
+        assert.strictEqual(80, info.width);
+        assert.strictEqual(2400, info.height);
+        assert.strictEqual(4, info.channels);
+      })
+  );
+});