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website/functions/node_modules/traverse/test/mutability.js

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+var test = require('tape');
+var traverse = require('../');
+var deepEqual = require('./lib/deep_equal');
+
+test('mutate', function (t) {
+    var obj = { a : 1, b : 2, c : [ 3, 4 ] };
+    var res = traverse(obj).forEach(function (x) {
+        if (typeof x === 'number' && x % 2 === 0) {
+            this.update(x * 10);
+        }
+    });
+    t.same(obj, res);
+    t.same(obj, { a : 1, b : 20, c : [ 3, 40 ] });
+    t.end();
+});
+
+test('mutateT', function (t) {
+    var obj = { a : 1, b : 2, c : [ 3, 4 ] };
+    var res = traverse.forEach(obj, function (x) {
+        if (typeof x === 'number' && x % 2 === 0) {
+            this.update(x * 10);
+        }
+    });
+    t.same(obj, res);
+    t.same(obj, { a : 1, b : 20, c : [ 3, 40 ] });
+    t.end();
+});
+
+test('map', function (t) {
+    var obj = { a : 1, b : 2, c : [ 3, 4 ] };
+    var res = traverse(obj).map(function (x) {
+        if (typeof x === 'number' && x % 2 === 0) {
+            this.update(x * 10);
+        }
+    });
+    t.same(obj, { a : 1, b : 2, c : [ 3, 4 ] });
+    t.same(res, { a : 1, b : 20, c : [ 3, 40 ] });
+    t.end();
+});
+
+test('mapT', function (t) {
+    var obj = { a : 1, b : 2, c : [ 3, 4 ] };
+    var res = traverse.map(obj, function (x) {
+        if (typeof x === 'number' && x % 2 === 0) {
+            this.update(x * 10);
+        }
+    });
+    t.same(obj, { a : 1, b : 2, c : [ 3, 4 ] });
+    t.same(res, { a : 1, b : 20, c : [ 3, 40 ] });
+    t.end();
+});
+
+test('clone', function (t) {
+    var obj = { a : 1, b : 2, c : [ 3, 4 ] };
+    var res = traverse(obj).clone();
+    t.same(obj, res);
+    t.ok(obj !== res);
+    obj.a ++;
+    t.same(res.a, 1);
+    obj.c.push(5);
+    t.same(res.c, [ 3, 4 ]);
+    t.end();
+});
+
+test('cloneT', function (t) {
+    var obj = { a : 1, b : 2, c : [ 3, 4 ] };
+    var res = traverse.clone(obj);
+    t.same(obj, res);
+    t.ok(obj !== res);
+    obj.a ++;
+    t.same(res.a, 1);
+    obj.c.push(5);
+    t.same(res.c, [ 3, 4 ]);
+    t.end();
+});
+
+test('reduce', function (t) {
+    var obj = { a : 1, b : 2, c : [ 3, 4 ] };
+    var res = traverse(obj).reduce(function (acc, x) {
+        if (this.isLeaf) acc.push(x);
+        return acc;
+    }, []);
+    t.same(obj, { a : 1, b : 2, c : [ 3, 4 ] });
+    t.same(res, [ 1, 2, 3, 4 ]);
+    t.end();
+});
+
+test('reduceInit', function (t) {
+    var obj = { a : 1, b : 2, c : [ 3, 4 ] };
+    var res = traverse(obj).reduce(function (acc, x) {
+        if (this.isRoot) assert.fail('got root');
+        return acc;
+    });
+    t.same(obj, { a : 1, b : 2, c : [ 3, 4 ] });
+    t.same(res, obj);
+    t.end();
+});
+
+test('remove', function (t) {
+    var obj = { a : 1, b : 2, c : [ 3, 4 ] };
+    traverse(obj).forEach(function (x) {
+        if (this.isLeaf && x % 2 == 0) this.remove();
+    });
+    
+    t.same(obj, { a : 1, c : [ 3 ] });
+    t.end();
+});
+
+exports.removeNoStop = function() {
+    var obj = { a : 1, b : 2, c : { d: 3, e: 4 }, f: 5 };
+    
+    var keys = [];
+    traverse(obj).forEach(function (x) {
+        keys.push(this.key)
+        if (this.key == 'c') this.remove();
+    });
+
+    t.same(keys, [undefined, 'a', 'b', 'c', 'd', 'e', 'f'])
+    t.end();
+}
+
+exports.removeStop = function() {
+    var obj = { a : 1, b : 2, c : { d: 3, e: 4 }, f: 5 };
+    
+    var keys = [];
+    traverse(obj).forEach(function (x) {
+        keys.push(this.key)
+        if (this.key == 'c') this.remove(true);
+    });
+
+    t.same(keys, [undefined, 'a', 'b', 'c', 'f'])
+    t.end();
+}
+
+test('removeMap', function (t) {
+    var obj = { a : 1, b : 2, c : [ 3, 4 ] };
+    var res = traverse(obj).map(function (x) {
+        if (this.isLeaf && x % 2 == 0) this.remove();
+    });
+    
+    t.same(obj, { a : 1, b : 2, c : [ 3, 4 ] });
+    t.same(res, { a : 1, c : [ 3 ] });
+    t.end();
+});
+
+test('delete', function (t) {
+    var obj = { a : 1, b : 2, c : [ 3, 4 ] };
+    traverse(obj).forEach(function (x) {
+        if (this.isLeaf && x % 2 == 0) this.delete();
+    });
+    
+    t.ok(!deepEqual(
+        obj, { a : 1, c : [ 3, undefined ] }
+    ));
+    
+    t.ok(deepEqual(
+        obj, { a : 1, c : [ 3 ] }
+    ));
+    
+    t.ok(!deepEqual(
+        obj, { a : 1, c : [ 3, null ] }
+    ));
+    t.end();
+});
+
+test('deleteNoStop', function (t) {
+    var obj = { a : 1, b : 2, c : { d: 3, e: 4 } };
+    
+    var keys = [];
+    traverse(obj).forEach(function (x) {
+        keys.push(this.key)
+        if (this.key == 'c') this.delete();
+    });
+
+    t.same(keys, [undefined, 'a', 'b', 'c', 'd', 'e'])
+    t.end();
+});
+
+test('deleteStop', function (t) {
+    var obj = { a : 1, b : 2, c : { d: 3, e: 4 } };
+    
+    var keys = [];
+    traverse(obj).forEach(function (x) {
+        keys.push(this.key)
+        if (this.key == 'c') this.delete(true);
+    });
+
+    t.same(keys, [undefined, 'a', 'b', 'c'])
+    t.end();
+});
+
+test('deleteRedux', function (t) {
+    var obj = { a : 1, b : 2, c : [ 3, 4, 5 ] };
+    traverse(obj).forEach(function (x) {
+        if (this.isLeaf && x % 2 == 0) this.delete();
+    });
+    
+    t.ok(!deepEqual(
+        obj, { a : 1, c : [ 3, undefined, 5 ] }
+    ));
+    
+    t.ok(deepEqual(
+        obj, { a : 1, c : [ 3 ,, 5 ] }
+    ));
+    
+    t.ok(!deepEqual(
+        obj, { a : 1, c : [ 3, null, 5 ] }
+    ));
+    
+    t.ok(!deepEqual(
+        obj, { a : 1, c : [ 3, 5 ] }
+    ));
+    
+    t.end();
+});
+
+test('deleteMap', function (t) {
+    var obj = { a : 1, b : 2, c : [ 3, 4 ] };
+    var res = traverse(obj).map(function (x) {
+        if (this.isLeaf && x % 2 == 0) this.delete();
+    });
+    
+    t.ok(deepEqual(
+        obj,
+        { a : 1, b : 2, c : [ 3, 4 ] }
+    ));
+    
+    var xs = [ 3, 4 ];
+    delete xs[1];
+    
+    t.ok(deepEqual(
+        res, { a : 1, c : xs }
+    ));
+    
+    t.ok(deepEqual(
+        res, { a : 1, c : [ 3, ] }
+    ));
+    
+    t.ok(deepEqual(
+        res, { a : 1, c : [ 3 ] }
+    ));
+    
+    t.end();
+});
+
+test('deleteMapRedux', function (t) {
+    var obj = { a : 1, b : 2, c : [ 3, 4, 5 ] };
+    var res = traverse(obj).map(function (x) {
+        if (this.isLeaf && x % 2 == 0) this.delete();
+    });
+    
+    t.ok(deepEqual(
+        obj,
+        { a : 1, b : 2, c : [ 3, 4, 5 ] }
+    ));
+    
+    var xs = [ 3, 4, 5 ];
+    delete xs[1];
+    
+    t.ok(deepEqual(
+        res, { a : 1, c : xs }
+    ));
+    
+    t.ok(!deepEqual(
+        res, { a : 1, c : [ 3, 5 ] }
+    ));
+    
+    t.ok(deepEqual(
+        res, { a : 1, c : [ 3 ,, 5 ] }
+    ));
+    
+    t.end();
+});
+
+test('objectToString', function (t) {
+    var obj = { a : 1, b : 2, c : [ 3, 4 ] };
+    var res = traverse(obj).forEach(function (x) {
+        if (typeof x === 'object' && !this.isRoot) {
+            this.update(JSON.stringify(x));
+        }
+    });
+    t.same(obj, res);
+    t.same(obj, { a : 1, b : 2, c : "[3,4]" });
+    t.end();
+});
+
+test('stringToObject', function (t) {
+    var obj = { a : 1, b : 2, c : "[3,4]" };
+    var res = traverse(obj).forEach(function (x) {
+        if (typeof x === 'string') {
+            this.update(JSON.parse(x));
+        }
+        else if (typeof x === 'number' && x % 2 === 0) {
+            this.update(x * 10);
+        }
+    });
+    t.deepEqual(obj, res);
+    t.deepEqual(obj, { a : 1, b : 20, c : [ 3, 40 ] });
+    t.end();
+});