specific development related number-to-string conversion tests for Number.prototype

testcases/test-numconv-tostring-exp.js

@@ -0,0 +1,34 @@
+/*===
+1e+2
+8e+2
+1e+3
+1.23e+4
+9.88e+4
+1.00e+5
+1e+4
+1e-1
+===*/
+
+function expTest() {
+    function test(x,n) {
+        print(new Number(x).toExponential(n));
+    }
+
+    test(123, 0);
+    test(750, 0);  // rounds up
+    test(999, 0);  // rounds up, over first digit
+
+    test(12345, 2);
+    test(98750, 2);  // rounds up
+    test(99999, 2);  // ronuds up, over first digit
+
+    test(12345, undefined);
+    test(0.1, undefined);
+}
+
+try {
+    expTest();
+} catch (e) {
+    print(e);
+}
+

testcases/test-numconv-tostring-fixed.js

@@ -0,0 +1,31 @@
+/*===
+1.000
+900000000000000000000.00000000000000000000
+1e+21
+0
+1
+0
+1
+===*/
+
+function fixedTest() {
+    function test(x, n) {
+        print(new Number(x).toFixed(n));
+    }
+
+    test(1, 3);
+    test(9e20, 20);
+    test(1e21, 20);  // falls back to ToString()
+
+    test(0.1, 0);
+    test(0.9, 0);  // rounds up
+    test(0.1, undefined);
+    test(0.9, undefined);  // rounds up
+}
+
+try {
+    fixedTest();
+} catch (e) {
+    print(e);
+}
+

testcases/test-numconv-tostring-prec.js

@@ -0,0 +1,59 @@
+/*===
+0.00
+1.00
+1.00
+0.9999
+0.99999
+1.23457e+7
+1.234568e+7
+12345678
+12345678.0
+8.76543e+7
+8.765432e+7
+87654321
+87654321.0
+5.556e+4
+55555
+4.444e+4
+44444
+1.000e+5
+99999
+===*/
+
+function precisionTest() {
+    function test(x, n) {
+        print(new Number(x).toPrecision(n));
+    }
+
+    test(0, 3);
+    test(1, 3);
+
+    test(0.9999, 3);
+    test(0.9999, 4);
+    test(0.9999, 5);
+
+    test(12345678, 6);  // rounds up
+    test(12345678, 7);  // rounds up
+    test(12345678, 8);
+    test(12345678, 9);
+
+    test(87654321, 6);  // rounds down
+    test(87654321, 7);  // rounds down
+    test(87654321, 8);
+    test(87654321, 9);
+
+    test(55555, 4);  // rounds up
+    test(55555, 5);
+    test(44444, 4);  // rounds down
+    test(44444, 5);
+
+    test(99999, 4);  // rounds up, carries
+    test(99999, 5);
+}
+
+try {
+    precisionTest();
+} catch (e) {
+    print(e);
+}
+