🐛 fix(Integer): Fix and test squaring and power methods.

Author: make-github-pseudonymous-again

src/Integer.js

@@ -218,19 +218,19 @@ export class Integer {
 
 	ipown ( number ) {
 		// TODO optimize but be careful with side effects
-		return this.pown(other).move(this);
+		return this.pown(number).move(this);
 	}
 
 	square ( ) {
 		// TODO optimize but be careful with side effects
 		// TODO use this.mul(this) instead?
-		return this.pow(2);
+		return this.pown(2);
 	}
 
 	isquare ( ) {
 		// TODO optimize but be careful with side effects
 		// TODO use this.imul(this) instead?
-		return this.ipow(2);
+		return this.ipown(2);
 	}
 
 	div ( other ) {

test/src/Integer/square.js

@@ -0,0 +1,15 @@
+import test from 'ava' ;
+import { ZZ } from '../../../src' ;
+
+function number ( t , x ) {
+	t.is(x*x, ZZ.from(x).isquare().valueOf() ) ;
+}
+
+number.title = ( providedTitle , x ) => `${x}^2 = ${x*x}` ;
+
+test( number , -1 ) ;
+test( number , 0 ) ;
+test( number , 1 ) ;
+test( number , 2 ) ;
+test( number , 777 ) ;
+test( number , -17321983 ) ;