Improve the regex, require Node.js 8 (#15)

Author: Yanis Benson

.travis.yml

@@ -1,4 +1,3 @@
 language: node_js
 node_js:
  - '8'
- - '6'

index.js

@@ -1,2 +1,3 @@
 'use strict';
-module.exports = () => /\bv?(?:0|[1-9]\d*)\.(?:0|[1-9]\d*)\.(?:0|[1-9]\d*)(?:-[\da-z-]+(?:\.[\da-z-]+)*)?(?:\+[\da-z-]+(?:\.[\da-z-]+)*)?\b/ig;
+module.exports = () => /(?<=^v?|\sv?)(?:0|[1-9]\d*)\.(?:0|[1-9]\d*)\.(?:0|[1-9]\d*)(?:-(?:[1-9]\d*|[\da-z-]*[a-z-][\da-z-]*)(?:\.(?:[1-9]\d*|[\da-z-]*[a-z-][\da-z-]*))*)?(?:\+[\da-z-]+(?:\.[\da-z-]+)*)?(?=$|\s)/ig;
+

package.json

@@ -10,7 +10,7 @@
 "url": "sindresorhus.com"
 },
 "engines": {
-"node": ">=6"
+"node": ">=8"
 },
 "scripts": {
 "test": "xo && ava"

test.js

@@ -10,8 +10,8 @@ const fixture = [
 '2.7.2+asdf',
 '1.2.3-a.b.c.10.d.5',
 '2.7.2-foo+bar',
-'1.2.3-alpha.10.beta.0',
-'1.2.3-alpha.10.beta.0+build.unicorn.rainbow',
+'1.2.3-alpha.10.beta',
+'1.2.3-alpha.10.beta+build.unicorn.rainbow',
 'foo 0.0.0 bar 0.0.0'
 ];
 
@@ -31,7 +31,55 @@ test('returns semver on match', t => {
 t.deepEqual('foo 0.0.0 bar 0.1.1'.match(m()), ['0.0.0', '0.1.1']);
 });
 
-// See #7
-test.failing('does not return tag prefix', t => {
+test('#7, does not return tag prefix', t => {
 t.deepEqual('v0.0.0'.match(m()), ['0.0.0']);
 });
+
+test('#14, does not match substrings of longer semver-similar strings, respect semver2.0.0 clause 9', t => {
+const invalidStrings = [
+'1',
+'1.2',
+'1.2.3-0123',
+'1.2.3-0123.0123',
+'1.1.2+.123',
+'+invalid',
+'-invalid',
+'-invalid+invalid',
+'-invalid.01',
+'alpha',
+'alpha.beta',
+'alpha.beta.1',
+'alpha.1',
+'alpha+beta',
+'alpha_beta',
+'alpha.',
+'alpha..',
+'beta',
+'1.0.0-alpha_beta',
+'-alpha.',
+'1.0.0-alpha..',
+'1.0.0-alpha..1',
+'1.0.0-alpha...1',
+'1.0.0-alpha....1',
+'1.0.0-alpha.....1',
+'1.0.0-alpha......1',
+'1.0.0-alpha.......1',
+'01.1.1',
+'1.01.1',
+'1.1.01',
+'1.2',
+'1.2.3.DEV',
+'1.2-SNAPSHOT',
+'1.2.31.2.3----RC-SNAPSHOT.12.09.1--..12+788',
+'1.2-RC-SNAPSHOT',
+'-1.0.3-gamma+b7718',
+'+justmeta',
+'9.8.7+meta+meta',
+'9.8.7-whatever+meta+meta',
+'99999999999999999999999.999999999999999999.99999999999999999----RC-SNAPSHOT.12.09.1--------------------------------..12'
+];
+
+for (const string of invalidStrings) {
+t.notRegex(string, m());
+}
+});