Organize tests

test/browser/spec/ol/proj/transforms.test.js

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+import * as transforms from '../../../../../src/ol/proj/transforms.js';
+import Projection from '../../../../../src/ol/proj/Projection.js';
+
+describe('transforms.remove()', function () {
+  const extent = [180, -90, 180, 90];
+  const units = 'degrees';
+
+  it('removes functions cached by transforms.add()', function () {
+    const foo = new Projection({
+      code: 'foo',
+      units: units,
+      extent: extent,
+    });
+    const bar = new Projection({
+      code: 'bar',
+      units: units,
+      extent: extent,
+    });
+    const transform = function (input, output, dimension) {
+      return input;
+    };
+    transforms.add(foo, bar, transform);
+    expect(transforms.get('foo', 'bar')).to.be(transform);
+
+    const removed = transforms.remove(foo, bar);
+    expect(removed).to.be(transform);
+    expect(transforms.get('foo', 'bar')).to.be(undefined);
+  });
+});