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node_modules/undefsafe/test/undefsafe.test.js

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+'use strict';
+/*global describe:true, it: true */
+var assert = require('assert');
+var undefsafe = require('../lib/undefsafe');
+
+describe('undefsafe', function () {
+  it('should handle primatives', function () {
+    var r = undefsafe(1, '');
+    assert(r === 1, 'undefsafe is 1: ' + r);
+  });
+
+  it('should handle empty objects', function () {
+    var value = {};
+    var r;
+
+    r = undefsafe(value, '');
+    assert(r === value, 'value is value' + r);
+
+    r = undefsafe(value, 'foo');
+    assert(r === undefined, 'value.foo is undefined: ' + r);
+
+    r = undefsafe(value, 'foo.bar');
+    assert(r === undefined, 'value.foo.bar is undefined: ' + r);
+  });
+
+  it('should handle null properties', function () {
+    var value = {
+      a: {
+        b: null,
+      },
+    };
+    var r;
+
+    r = undefsafe(value, 'a.b');
+    assert(r === null, 'value.a.b is null: ' + r);
+
+    r = undefsafe(value, 'a.b.c');
+    assert(r === undefined, 'value.a.b.c is undefined: ' + r);
+  });
+
+  it('should find deep object properties', function () {
+    var value = {
+      a: {
+        b: {
+          c: {
+            d: 10,
+            e: {
+              f: 20,
+            },
+            g: true,
+            h: false,
+            i: undefined,
+            j: null,
+          },
+        },
+      },
+    };
+    var r;
+
+    r = undefsafe(value, 'a');
+    assert(r === value.a, 'value.a: ' + r + ' ' + value.a);
+
+    r = undefsafe(value, 'a.foo');
+    assert(r === undefined, 'value.a.foo is undefined: ' + r);
+
+    r = undefsafe(value, 'a.b.c.d');
+    assert(r === 10, 'value.a.b.c.d = 10');
+
+    r = undefsafe(value, 'a.b.c.e');
+    assert(r === value.a.b.c.e, 'value.a.b.c.e = <object>');
+
+    r = undefsafe(value, 'a.b.c.g');
+    assert(r === true, 'bool(true)');
+
+    r = undefsafe(value, 'a.b.c.h');
+    assert(r === false, 'bool(false)');
+
+    r = undefsafe(value, 'a.b.c.i');
+    assert(r === undefined, 'undefined');
+
+    r = undefsafe(value, 'a.b.c.j');
+    assert(r === null, 'null');
+  });
+});