Added test cases

Author: SakiTakamachi

ext/bcmath/tests/bcsqrt.phpt

@@ -28,6 +28,20 @@ foreach ($scales as $scale) {
     }
 }
 
+echo "\n";
+
+$radicants = [
+    "0.005432987654321",
+    "0.0005432987654321",
+    "0.0000000000005432987654321",
+    "0.00000000000005432987654321",
+    "0.00000000000098765432109876543210987654321098765432109876543210987654321",
+    "0.000000000000098765432109876543210987654321098765432109876543210987654321",
+];
+foreach ($radicants as $radicant) {
+    echo bcsqrt($radicant, 20), "\n";
+}
+
 ?>
 --EXPECT--
 0
@@ -52,3 +66,10 @@ foreach ($scales as $scale) {
 0.3872983346
 3.8729833462
 1.0000000000
+
+0.07370880309922960619
+0.02330877013984435859
+0.00000073708803099229
+0.00000023308770139844
+0.00000099380799005580
+0.00000031426968054503