diff options
Diffstat (limited to 'deps/npm/node_modules/is-regex/test.js')
-rw-r--r-- | deps/npm/node_modules/is-regex/test.js | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/deps/npm/node_modules/is-regex/test.js b/deps/npm/node_modules/is-regex/test.js new file mode 100644 index 0000000000..8d390038da --- /dev/null +++ b/deps/npm/node_modules/is-regex/test.js @@ -0,0 +1,58 @@ +'use strict'; + +var test = require('tape'); +var isRegex = require('./'); +var hasToStringTag = typeof Symbol === 'function' && typeof Symbol.toStringTag === 'symbol'; + +test('not regexes', function (t) { + t.notOk(isRegex(), 'undefined is not regex'); + t.notOk(isRegex(null), 'null is not regex'); + t.notOk(isRegex(false), 'false is not regex'); + t.notOk(isRegex(true), 'true is not regex'); + t.notOk(isRegex(42), 'number is not regex'); + t.notOk(isRegex('foo'), 'string is not regex'); + t.notOk(isRegex([]), 'array is not regex'); + t.notOk(isRegex({}), 'object is not regex'); + t.notOk(isRegex(function () {}), 'function is not regex'); + t.end(); +}); + +test('@@toStringTag', { skip: !hasToStringTag }, function (t) { + var regex = /a/g; + var fakeRegex = { + toString: function () { return String(regex); }, + valueOf: function () { return regex; } + }; + fakeRegex[Symbol.toStringTag] = 'RegExp'; + t.notOk(isRegex(fakeRegex), 'fake RegExp with @@toStringTag "RegExp" is not regex'); + t.end(); +}); + +test('regexes', function (t) { + t.ok(isRegex(/a/g), 'regex literal is regex'); + t.ok(isRegex(new RegExp('a', 'g')), 'regex object is regex'); + t.end(); +}); + +test('does not mutate regexes', function (t) { + t.test('lastIndex is a marker object', function (st) { + var regex = /a/; + var marker = {}; + regex.lastIndex = marker; + st.equal(regex.lastIndex, marker, 'lastIndex is the marker object'); + st.ok(isRegex(regex), 'is regex'); + st.equal(regex.lastIndex, marker, 'lastIndex is the marker object after isRegex'); + st.end(); + }); + + t.test('lastIndex is nonzero', function (st) { + var regex = /a/; + regex.lastIndex = 3; + st.equal(regex.lastIndex, 3, 'lastIndex is 3'); + st.ok(isRegex(regex), 'is regex'); + st.equal(regex.lastIndex, 3, 'lastIndex is 3 after isRegex'); + st.end(); + }); + + t.end(); +}); |