Add RangeTests, see #77

js/RangeTests.js

@@ -0,0 +1,52 @@
+// Copyright 2018, University of Colorado Boulder
+
+/**
+ * Range tests
+ *
+ * @author Chris Klusendorf (PhET Interactive Simulations)
+ */
+
+define( require => {
+  'use strict';
+
+  // modules
+  const Range = require( 'DOT/Range' );
+
+  QUnit.module( 'Range' );
+
+  QUnit.test( 'constructor', assert => {
+    assert.ok( new Range( 1, 10 ), 'valid range' );
+    assert.ok( new Range( 10, 10 ), 'valid range' );
+    window.assert && assert.throws( () => {
+      new Range( 10, 1 ); // eslint-disable-line
+    }, 'invalid range, max < min' );
+  } );
+
+  QUnit.test( 'methods', assert => {
+
+    // test a valid and invalid setMin()
+    const range1 = new Range( 1, 10 );
+    range1.setMin( 9 );
+    assert.equal( range1.min, 9, 'setMin() succeeds when min < max' );
+    window.assert && assert.throws( () => { range1.setMin( 11 ); }, 'setMin() fails when min > max' );
+
+    // test a valid and invalid setMax()
+    const range2 = new Range( 1, 10 );
+    range2.setMax( 2 );
+    assert.equal( range2.max, 2, 'setMax() succeeds when max > min' );
+    window.assert && assert.throws( () => { range2.setMax( 0 ); }, 'setMax() fails when max < min' );
+
+    // test a true and false equals()
+    const range3 = new Range( 1, 10 );
+    const range4 = new Range( 1, 10 );
+    assert.ok( range3.equals( range4 ), 'equals() succeeds when range1 === range2' );
+    range4.setMin( 2 );
+    assert.notOk( range3.equals( range4 ), 'equals() fails when range1 !== range2' );
+
+    // test a valid and invalid setMinMax()
+    const range5 = new Range( 1, 10 );
+    range5.setMinMax( 2, 11 );
+    assert.ok( range5.equals( new Range( 2, 11 ) ), 'setMinMax() succeeds when min < max' );
+    window.assert && assert.throws( () => { range5.setMinMax( 10, 1 ); }, 'setMinMax() fails when min > max' );
+  } );
+} );

js/dot-tests.js

@@ -16,6 +16,7 @@ define( function( require ) {
   require( 'DOT/Matrix3Tests' );
   require( 'DOT/MatrixOps3Tests' );
   require( 'DOT/OpenRangeTests' );
+  require( 'DOT/RangeTests' );
   require( 'DOT/UtilTests' );
   require( 'DOT/Transform3Tests' );
   require( 'DOT/LinearFunctionTests' );