diff options
Diffstat (limited to 'deps/npm/node_modules/function-bind/test/index.js')
-rw-r--r-- | deps/npm/node_modules/function-bind/test/index.js | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/deps/npm/node_modules/function-bind/test/index.js b/deps/npm/node_modules/function-bind/test/index.js new file mode 100644 index 00000000000..2edecce2f0f --- /dev/null +++ b/deps/npm/node_modules/function-bind/test/index.js @@ -0,0 +1,252 @@ +// jscs:disable requireUseStrict + +var test = require('tape'); + +var functionBind = require('../implementation'); +var getCurrentContext = function () { return this; }; + +test('functionBind is a function', function (t) { + t.equal(typeof functionBind, 'function'); + t.end(); +}); + +test('non-functions', function (t) { + var nonFunctions = [true, false, [], {}, 42, 'foo', NaN, /a/g]; + t.plan(nonFunctions.length); + for (var i = 0; i < nonFunctions.length; ++i) { + try { functionBind.call(nonFunctions[i]); } catch (ex) { + t.ok(ex instanceof TypeError, 'throws when given ' + String(nonFunctions[i])); + } + } + t.end(); +}); + +test('without a context', function (t) { + t.test('binds properly', function (st) { + var args, context; + var namespace = { + func: functionBind.call(function () { + args = Array.prototype.slice.call(arguments); + context = this; + }) + }; + namespace.func(1, 2, 3); + st.deepEqual(args, [1, 2, 3]); + st.equal(context, getCurrentContext.call()); + st.end(); + }); + + t.test('binds properly, and still supplies bound arguments', function (st) { + var args, context; + var namespace = { + func: functionBind.call(function () { + args = Array.prototype.slice.call(arguments); + context = this; + }, undefined, 1, 2, 3) + }; + namespace.func(4, 5, 6); + st.deepEqual(args, [1, 2, 3, 4, 5, 6]); + st.equal(context, getCurrentContext.call()); + st.end(); + }); + + t.test('returns properly', function (st) { + var args; + var namespace = { + func: functionBind.call(function () { + args = Array.prototype.slice.call(arguments); + return this; + }, null) + }; + var context = namespace.func(1, 2, 3); + st.equal(context, getCurrentContext.call(), 'returned context is namespaced context'); + st.deepEqual(args, [1, 2, 3], 'passed arguments are correct'); + st.end(); + }); + + t.test('returns properly with bound arguments', function (st) { + var args; + var namespace = { + func: functionBind.call(function () { + args = Array.prototype.slice.call(arguments); + return this; + }, null, 1, 2, 3) + }; + var context = namespace.func(4, 5, 6); + st.equal(context, getCurrentContext.call(), 'returned context is namespaced context'); + st.deepEqual(args, [1, 2, 3, 4, 5, 6], 'passed arguments are correct'); + st.end(); + }); + + t.test('called as a constructor', function (st) { + var thunkify = function (value) { + return function () { return value; }; + }; + st.test('returns object value', function (sst) { + var expectedReturnValue = [1, 2, 3]; + var Constructor = functionBind.call(thunkify(expectedReturnValue), null); + var result = new Constructor(); + sst.equal(result, expectedReturnValue); + sst.end(); + }); + + st.test('does not return primitive value', function (sst) { + var Constructor = functionBind.call(thunkify(42), null); + var result = new Constructor(); + sst.notEqual(result, 42); + sst.end(); + }); + + st.test('object from bound constructor is instance of original and bound constructor', function (sst) { + var A = function (x) { + this.name = x || 'A'; + }; + var B = functionBind.call(A, null, 'B'); + + var result = new B(); + sst.ok(result instanceof B, 'result is instance of bound constructor'); + sst.ok(result instanceof A, 'result is instance of original constructor'); + sst.end(); + }); + + st.end(); + }); + + t.end(); +}); + +test('with a context', function (t) { + t.test('with no bound arguments', function (st) { + var args, context; + var boundContext = {}; + var namespace = { + func: functionBind.call(function () { + args = Array.prototype.slice.call(arguments); + context = this; + }, boundContext) + }; + namespace.func(1, 2, 3); + st.equal(context, boundContext, 'binds a context properly'); + st.deepEqual(args, [1, 2, 3], 'supplies passed arguments'); + st.end(); + }); + + t.test('with bound arguments', function (st) { + var args, context; + var boundContext = {}; + var namespace = { + func: functionBind.call(function () { + args = Array.prototype.slice.call(arguments); + context = this; + }, boundContext, 1, 2, 3) + }; + namespace.func(4, 5, 6); + st.equal(context, boundContext, 'binds a context properly'); + st.deepEqual(args, [1, 2, 3, 4, 5, 6], 'supplies bound and passed arguments'); + st.end(); + }); + + t.test('returns properly', function (st) { + var boundContext = {}; + var args; + var namespace = { + func: functionBind.call(function () { + args = Array.prototype.slice.call(arguments); + return this; + }, boundContext) + }; + var context = namespace.func(1, 2, 3); + st.equal(context, boundContext, 'returned context is bound context'); + st.notEqual(context, getCurrentContext.call(), 'returned context is not lexical context'); + st.deepEqual(args, [1, 2, 3], 'passed arguments are correct'); + st.end(); + }); + + t.test('returns properly with bound arguments', function (st) { + var boundContext = {}; + var args; + var namespace = { + func: functionBind.call(function () { + args = Array.prototype.slice.call(arguments); + return this; + }, boundContext, 1, 2, 3) + }; + var context = namespace.func(4, 5, 6); + st.equal(context, boundContext, 'returned context is bound context'); + st.notEqual(context, getCurrentContext.call(), 'returned context is not lexical context'); + st.deepEqual(args, [1, 2, 3, 4, 5, 6], 'passed arguments are correct'); + st.end(); + }); + + t.test('passes the correct arguments when called as a constructor', function (st) { + var expected = { name: 'Correct' }; + var namespace = { + Func: functionBind.call(function (arg) { + return arg; + }, { name: 'Incorrect' }) + }; + var returned = new namespace.Func(expected); + st.equal(returned, expected, 'returns the right arg when called as a constructor'); + st.end(); + }); + + t.test('has the new instance\'s context when called as a constructor', function (st) { + var actualContext; + var expectedContext = { foo: 'bar' }; + var namespace = { + Func: functionBind.call(function () { + actualContext = this; + }, expectedContext) + }; + var result = new namespace.Func(); + st.equal(result instanceof namespace.Func, true); + st.notEqual(actualContext, expectedContext); + st.end(); + }); + + t.end(); +}); + +test('bound function length', function (t) { + t.test('sets a correct length without thisArg', function (st) { + var subject = functionBind.call(function (a, b, c) { return a + b + c; }); + st.equal(subject.length, 3); + st.equal(subject(1, 2, 3), 6); + st.end(); + }); + + t.test('sets a correct length with thisArg', function (st) { + var subject = functionBind.call(function (a, b, c) { return a + b + c; }, {}); + st.equal(subject.length, 3); + st.equal(subject(1, 2, 3), 6); + st.end(); + }); + + t.test('sets a correct length without thisArg and first argument', function (st) { + var subject = functionBind.call(function (a, b, c) { return a + b + c; }, undefined, 1); + st.equal(subject.length, 2); + st.equal(subject(2, 3), 6); + st.end(); + }); + + t.test('sets a correct length with thisArg and first argument', function (st) { + var subject = functionBind.call(function (a, b, c) { return a + b + c; }, {}, 1); + st.equal(subject.length, 2); + st.equal(subject(2, 3), 6); + st.end(); + }); + + t.test('sets a correct length without thisArg and too many arguments', function (st) { + var subject = functionBind.call(function (a, b, c) { return a + b + c; }, undefined, 1, 2, 3, 4); + st.equal(subject.length, 0); + st.equal(subject(), 6); + st.end(); + }); + + t.test('sets a correct length with thisArg and too many arguments', function (st) { + var subject = functionBind.call(function (a, b, c) { return a + b + c; }, {}, 1, 2, 3, 4); + st.equal(subject.length, 0); + st.equal(subject(), 6); + st.end(); + }); +}); |