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packages/model-viewer/src/test/utilities-spec.ts

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+/* @license
+ * Copyright 2019 Google LLC. All Rights Reserved.
+ * Licensed under the Apache License, Version 2.0 (the 'License');
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an 'AS IS' BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import {expect} from 'chai';
+
+import {clamp, deserializeUrl, step} from '../utilities.js';
+
+suite('utils', () => {
+  suite('deserializeUrl', () => {
+    test('returns a string given a string', () => {
+      expect(deserializeUrl('foo')).to.be.a('string');
+    });
+
+    test('returns null given a null-ish value', () => {
+      expect(deserializeUrl(null)).to.be.equal(null);
+    });
+
+    test('yields a url on the same origin for relative paths', () => {
+      const {origin} = window.location;
+
+      expect(deserializeUrl('foo')!.indexOf(origin)).to.be.equal(0);
+    });
+  });
+
+  suite('step', () => {
+    test('returns 0 for values below edge', () => {
+      expect(step(0.5, 0.1)).to.be.equal(0);
+    });
+
+    test('returns 1 for values above edge', () => {
+      expect(step(0.5, 0.9)).to.be.equal(1);
+    });
+  });
+
+  suite('clamp', () => {
+    test('numbers below lower limit adjusted to lower limit', () => {
+      expect(clamp(1.0, 2.0, 3.0)).to.be.equal(2.0);
+    });
+
+    test('numbers above upper limit adjusted to upper limit', () => {
+      expect(clamp(4.0, 2.0, 3.0)).to.be.equal(3.0);
+    });
+
+    test('numbers within lower and upper limits unchanged', () => {
+      expect(clamp(2.5, 2.0, 3.0)).to.be.equal(2.5);
+    });
+  });
+});