Tests: a few more speed improvements

package.json

@@ -80,7 +80,7 @@
     "install": "(node install/libvips && node install/dll-copy && prebuild-install) || (node-gyp rebuild && node install/dll-copy)",
     "clean": "rm -rf node_modules/ build/ vendor/ .nyc_output/ coverage/ test/fixtures/output.*",
     "test": "semistandard && cpplint && npm run test-unit && npm run test-licensing",
-    "test-unit": "nyc --reporter=lcov --branches=99 mocha --slow=5000 --timeout=60000 ./test/unit/*.js",
+    "test-unit": "nyc --reporter=lcov --branches=99 mocha --slow=1000 --timeout=60000 ./test/unit/*.js",
     "test-licensing": "license-checker --production --summary --onlyAllow=\"Apache-2.0;BSD;ISC;MIT\"",
     "test-coverage": "./test/coverage/report.sh",
     "test-leak": "./test/leak/leak.sh",
@@ -130,11 +130,11 @@
     "async": "^3.2.0",
     "cc": "^3.0.1",
     "decompress-zip": "^0.3.3",
-    "documentation": "^13.1.1",
+    "documentation": "^13.2.0",
     "exif-reader": "^1.0.3",
     "icc": "^2.0.0",
     "license-checker": "^25.0.1",
-    "mocha": "^8.3.1",
+    "mocha": "^8.3.2",
     "mock-fs": "^4.13.0",
     "nyc": "^15.1.0",
     "prebuild": "^10.0.1",

test/unit/colourspace.js

@@ -42,18 +42,15 @@ describe('Colour space conversion', function () {
       });
   });
 
-  if (sharp.format.tiff.input.file && sharp.format.webp.output.buffer) {
+  it('From 1-bit TIFF to sRGB WebP', async () => {
-    it('From 1-bit TIFF to sRGB WebP [slow]', function (done) {
+    const data = await sharp(fixtures.inputTiff)
-      sharp(fixtures.inputTiff)
+      .resize(8, 8)
       .webp()
-        .toBuffer(function (err, data, info) {
+      .toBuffer();
-          if (err) throw err;
+
-          assert.strictEqual(true, data.length > 0);
+    const { format } = await sharp(data).metadata();
-          assert.strictEqual('webp', info.format);
+    assert.strictEqual(format, 'webp');
-          done();
   });
-    });
-  }
 
   it('From CMYK to sRGB', function (done) {
     sharp(fixtures.inputJpgWithCmykProfile)

test/unit/extract.js

@@ -28,7 +28,6 @@ describe('Partial image extraction', function () {
       });
   });
 
-  if (sharp.format.webp.output.file) {
   it('WebP', function (done) {
     sharp(fixtures.inputWebP)
       .extract({ left: 100, top: 50, width: 125, height: 200 })
@@ -39,9 +38,7 @@ describe('Partial image extraction', function () {
         fixtures.assertSimilar(fixtures.expected('extract.webp'), data, done);
       });
   });
-  }
 
-  if (sharp.format.tiff.output.file) {
   it('TIFF', function (done) {
     sharp(fixtures.inputTiff)
       .extract({ left: 34, top: 63, width: 341, height: 529 })
@@ -53,7 +50,6 @@ describe('Partial image extraction', function () {
         fixtures.assertSimilar(fixtures.expected('extract.tiff'), data, done);
       });
   });
-  }
 
   it('Before resize', function (done) {
     sharp(fixtures.inputJpg)

test/unit/normalize.js

@@ -54,6 +54,7 @@ describe('Normalization', function () {
 
   it('keeps an existing alpha channel', function (done) {
     sharp(fixtures.inputPngWithTransparency)
+      .resize(8, 8)
       .normalize()
       .toBuffer(function (err, data) {
         if (err) throw err;
@@ -69,6 +70,7 @@ describe('Normalization', function () {
 
   it('keeps the alpha channel of greyscale images intact', function (done) {
     sharp(fixtures.inputPngWithGreyAlpha)
+      .resize(8, 8)
       .normalise()
       .toBuffer(function (err, data) {
         if (err) throw err;

test/unit/tiff.js

@@ -90,9 +90,11 @@ describe('TIFF', function () {
 
   it('Increasing TIFF quality increases file size', () =>
     sharp(fixtures.inputJpgWithLandscapeExif1)
+      .resize(320, 240)
       .tiff({ quality: 40 })
       .toBuffer()
       .then(tiff40 => sharp(fixtures.inputJpgWithLandscapeExif1)
+        .resize(320, 240)
         .tiff({ quality: 90 })
         .toBuffer()
         .then(tiff90 =>
@@ -155,6 +157,7 @@ describe('TIFF', function () {
 
   it('TIFF setting xres and yres on file', () =>
     sharp(fixtures.inputTiff)
+      .resize(8, 8)
       .tiff({
         xres: 1000,
         yres: 1000
@@ -171,6 +174,7 @@ describe('TIFF', function () {
 
   it('TIFF setting xres and yres on buffer', () =>
     sharp(fixtures.inputTiff)
+      .resize(8, 8)
       .tiff({
         xres: 1000,
         yres: 1000