Tests: tile-based output optional, will require custom libvips

The prebuilt binaries provided by v0.32.0 will not support
tile-based output, which is (hopefully) a temporary situation
until upstream licensing issues are resolved.

docs/changelog.md

@@ -56,6 +56,9 @@ Requires libvips v8.14.0
 * Ensure all async JS callbacks are wrapped to help avoid possible race condition.
   [#3569](https://github.com/lovell/sharp/issues/3569)
 
+* Prebuilt binaries: support for tile-based output temporarily removed due to licensing issue.
+  [#3581](https://github.com/lovell/sharp/issues/3581)
+
 * Add support to `normalise` for `lower` and `upper` percentiles.
   [#3583](https://github.com/lovell/sharp/pull/3583)
   [@LachlanNewman](https://github.com/LachlanNewman)

test/unit/tile.js

@@ -220,21 +220,16 @@ describe('Tile', function () {
 
   it('Valid depths pass', function () {
     ['onepixel', 'onetile', 'one'].forEach(function (depth) {
-      assert.doesNotThrow(function (depth) {
-        sharp().tile({
-          depth: depth
-        });
-      });
+      assert.doesNotThrow(() => sharp().tile({ depth }));
     });
   });
 
   it('Invalid depths fail', function () {
     ['depth', 1].forEach(function (depth) {
-      assert.throws(function () {
-        sharp().tile({
-          depth: depth
-        });
-      });
+      assert.throws(
+        () => sharp().tile({ depth }),
+        /Expected one of: onepixel, onetile, one for depth but received/
+      );
     });
   });
 
@@ -295,12 +290,17 @@ describe('Tile', function () {
     });
   });
 
-  it('Invalid center parameter value fail', function () {
-    assert.throws(function () {
-      sharp().tile({
-        centre: 'true'
-      });
+  it('Valid center parameter value passes', function () {
+    assert.doesNotThrow(
+      () => sharp().tile({ center: true })
+    );
   });
+
+  it('Invalid centre parameter value fails', function () {
+    assert.throws(
+      () => sharp().tile({ centre: 'true' }),
+      /Expected boolean for tileCentre but received true of type string/
+    );
   });
 
   it('Valid id parameter value passes', function () {
@@ -319,14 +319,20 @@ describe('Tile', function () {
     });
   });
 
-  it('Invalid basename parameter value fails', function () {
-    assert.throws(function () {
-      sharp().tile({
-        basename: true
-      });
-    });
+  it('Valid basename parameter value passes', function () {
+    assert.doesNotThrow(
+      () => sharp().tile({ basename: 'pass' })
+    );
   });
 
+  it('Invalid basename parameter value fails', function () {
+    assert.throws(
+      () => sharp().tile({ basename: true }),
+      /Expected string for basename but received/
+    );
+  });
+
+  if (sharp.format.dz.output.file) {
     it('Deep Zoom layout', function (done) {
       const directory = fixtures.path('output.dzi_files');
       fs.rm(directory, { recursive: true }, function () {
@@ -991,4 +997,5 @@ describe('Tile', function () {
           });
       });
     });
+  }
 });