v5.0.0

test/modules/powSqrt.js

@@ -0,0 +1,42 @@
+if (typeof T === 'undefined') require('../setup');
+
+(function () {
+    T('pow against sqrt');
+
+    Decimal.config({
+        toExpNeg: -7,
+        toExpPos: 21,
+        minE: -9e15,
+        maxE: 9e15
+    });
+
+    for (var e, n, p, r, s; total < 10000; ) {
+
+        // Get a random value in the range [0,1) with a random number of significant digits
+        // in the range [1, 40], as a string in exponential format.
+        e = Decimal.random( Math.random() * 40 + 1 | 0 ).toExponential();
+
+        // Change exponent to a non-zero value of random length in the range (-9e15, 9e15).
+        r = new Decimal(e.slice(0, e.indexOf('e') + 1) + ( Math.random() < 0.5 ? '-' : '' ) +
+          ( n = Math.floor( Math.random() * 9e15 ) + '' ).slice( Math.random() * n.length | 0 ));
+        //T.write(' r:          ' + r);
+
+        // Random rounding mode.
+        Decimal.rounding = Math.random() * 9 | 0;
+
+        // Random precision in the range [1, 40].
+        Decimal.precision = Math.random() * 40 + 1 | 0;
+
+        p = r.pow(0.5);
+        //T.write(' r.pow(0.5): ' + p);
+
+        // sqrt is much faster than pow(0.5)
+        s = r.sqrt();
+        //T.write(' r.sqrt():   ' + s);
+
+        T.assertEqual(p.valueOf(), s.valueOf());
+    }
+
+    T.stop();
+})();
+