update test descriptions

Author: Daniele Solombrino

test.js

@@ -27,12 +27,12 @@ test('should contain debug information', t => {
 	t.is(pres.context.debug.length, 2);
 });
 
-test('type defined, error does not exist', t => {
+test('should return false, if error does not exist', t => {
 	const out = m.throw('InexistentError', 'This error does not exist', 130);
 	t.is(m.thrown(out, 'InexistentError'), false);
 });
 
-test('type defined, error exists', t => {
+test('should return true, if the error exists', t => {
 	const out = m.throw('WrongAcceptError', 'I cannot accept this', 118);
 	t.is(m.thrown(out, 'WrongAcceptError'), true);
 });