Changeset 16744 for branches/2994-AutoDiffForIntervals/Tests

Timestamp:

04/02/19 13:55:49 (6 years ago)

Author:

gkronber

Message:

#2994: slightly changed calculation of integer powers for intervals and added unit tests.

File:

• branches/2994-AutoDiffForIntervals/Tests/AutoDiffTest.cs (modified) (2 diffs)

branches/2994-AutoDiffForIntervals/Tests/AutoDiffTest.cs

@@ -107 +107 @@
 
       {
+        // Interval tests
+        var intervals = new Dictionary<string, Interval>();
+        intervals.Add("x", new Interval(-2.0, 3.0));
+        intervals.Add("p", new Interval(1.0, 2.0));
+        intervals.Add("n", new Interval(-2.0, -1.0));
+
+        AssertInterval("10*x", intervals, -20, 30);
+        AssertInterval("sqr(p)", intervals, 1, 4);
+        AssertInterval("sqr(n)", intervals, 1, 4);
+        AssertInterval("sqr(x)", intervals, 0, 9);
+
+        AssertInterval("cube(p)", intervals, 1, 8);
+        AssertInterval("cube(n)", intervals, -8, -1);
+        AssertInterval("cube(x)", intervals, -8, 27);
+      }
+
+      {
         // interval eval and auto-diff
         var parser = new InfixExpressionParser();
@@ -226 +243 @@
 
     }
+
+    private void AssertInterval(string expression, Dictionary<string, Interval> intervals, double expectedLow, double expectedHigh) {
+      var parser = new InfixExpressionParser();
+      var t = parser.Parse(expression);
+      var evaluator = new IntervalEvaluator();
+      var result = evaluator.Evaluate(t, intervals);
+      Assert.AreEqual(expectedLow, result.LowerBound);
+      Assert.AreEqual(expectedHigh, result.UpperBound);
+    }
   }
 }