🔍 test: Increase coverage.

test/src/montgomery/conversion/from_out.js

@@ -0,0 +1,46 @@
+import test from 'ava';
+
+import {parse, stringify} from '@aureooms/js-integer-big-endian';
+
+import {Montgomery} from '../../../../src';
+
+const REPRESENTATION_BASE = 10;
+const DISPLAY_BASE = 10;
+
+function mod(t, N, A, expected) {
+	const n = parse(DISPLAY_BASE, REPRESENTATION_BASE, N);
+	const mont = new Montgomery(REPRESENTATION_BASE, n);
+
+	const a = parse(DISPLAY_BASE, REPRESENTATION_BASE, A);
+
+	const _amodN = mont.from(a);
+
+	const amodN = mont.out(_amodN);
+
+	const AmodN = stringify(
+		REPRESENTATION_BASE,
+		DISPLAY_BASE,
+		amodN,
+		0,
+		amodN.length,
+	);
+
+	t.is(expected, AmodN);
+}
+
+mod.title = (_, N, A, expected) => `${A} = ${expected} mod ${N}`;
+
+test(mod, '13', '125', '8');
+test(mod, '497', '4', '4');
+test(mod, '497', '16', '16');
+test(mod, '497', '64', '64');
+test(mod, '497', '256', '256');
+test(mod, '497', '1024', '30');
+test(mod, '497', '120', '120');
+test(mod, '497', '480', '480');
+test(mod, '497', '1920', '429');
+test(mod, '497', '1716', '225');
+test(mod, '497', '900', '403');
+test(mod, '497', '1612', '121');
+test(mod, '497', '484', '484');
+test(mod, '497', '1936', '445');

test/src/montgomery/throws_GCD.js

@@ -0,0 +1,25 @@
+import test from 'ava';
+
+import {Montgomery} from '../../../src';
+import {parse} from '@aureooms/js-integer-big-endian';
+
+const DISPLAY_BASE = 10;
+
+function throws(t, b, N) {
+	const n = parse(DISPLAY_BASE, b, N);
+	t.throws(() => new Montgomery(b, n), {message: /GCD/});
+}
+
+throws.title = (_, b, N) => `Montgomery(${b}, ${N}) throws because of GCD.`;
+
+test(throws, 10, '2');
+test(throws, 10, '5');
+test(throws, 10, '10');
+test(throws, 10, '12');
+test(throws, 10, '242');
+test(throws, 10, '385');
+test(throws, 10, '490');
+
+test(throws, 100, '12');
+
+test(throws, 82733, '82733');