mungedb-aggregate/test/lib/pipeline/expressions/Variables.js

"use strict";
var assert = require("assert"),
	Variables = require("../../../../lib/pipeline/expressions/Variables");


module.exports = {

	"Variables": {

		"constructor": {

			"Should be able to construct empty variables": function canConstructEmpty() {
				var variables = new Variables();
			},

			"Should be able to give number of variables": function giveNumber() {
				var variables = new Variables(5);
			},

			"Should throw if not given a number": function throwsOnInvalid() {
				assert.throws(function() {
					var variables = new Variables('hi');
				});
				assert.throws(function() {
					var variables = new Variables({});
				});
				assert.throws(function() {
					var variables = new Variables([]);
				});
				assert.throws(function() {
					var variables = new Variables(new Date());
				});
			},

			"setValue throws if no args given": function setValueThrows() {
				assert.throws(function() {
					var variables = new Variables();
					variables.setValue(1, 'hi');
				});
				
			}

		},

		"#setRoot": {
			"should set the _root variable to the passed value": function setsRoot() {
				var variables = new Variables(),
					root = {'hi':'hi'};
				variables.setRoot(root);
				assert.equal(root, variables._root);
			},

			"must be an object": function mustBeObject() {
				var variables = new Variables(),
					root = 'hi';
				assert.throws(function() {
					variables.setRoot(root);
				});
			}
		},

		"#clearRoot": {
			"should set the _root variable to empty obj": function setsRootToEmpty() {
				var variables = new Variables(),
					root = {'hi':'hi'};
				variables.setRoot(root);
				variables.clearRoot();
				assert.deepEqual({}, variables._root);
			}
		},

		"#getRoot": {
			"should return the _root variable": function returnsRoot() {
				var variables = new Variables(),
					root = {'hi':'hi'};
				variables.setRoot(root);
				assert.equal(root, variables.getRoot());
			}
		},

		"#setValue": {
			"id must be number": function idMustBeNumber() {
				assert.throws(function() {
					var variables = new Variables();
					variables.setValue('hi', 5);
				});
				assert.throws(function() {
					var variables = new Variables();
					variables.setValue(null, 5);
				});
				assert.throws(function() {
					var variables = new Variables();
					variables.setValue(new Date(), 5);
				});
				assert.throws(function() {
					var variables = new Variables();
					variables.setValue([], 5);
				});
				assert.throws(function() {
					var variables = new Variables();
					variables.setValue({}, 5);
				});
				assert.doesNotThrow(function() {
					var variables = new Variables(5);
					variables.setValue(1, 5);
				});
			},

			"cannot use root id": function cannotUseRootId() {
				assert.throws(function() {
					var variables = new Variables(5);
					variables.setValue(Variables.ROOT_ID, 'hi');
				});
			},

			"cannot use id larger than initial size": function idSizeIsCorrect() {
				assert.throws(function() {
					var variables = new Variables(5);
					variables.setValue(5, 'hi'); //off by one check
				});
				assert.throws(function() {
					var variables = new Variables(5);
					variables.setValue(6, 'hi');
				});
			},

			"sets the value": function setsTheValue() {
				var variables = new Variables(5);
				variables.setValue(1, 'hi'); //off by one check
				assert.equal(variables._rest[1], 'hi');
			}
		},

		"#getValue": {
			"id must be number": function idMustBeNumber() {
				assert.throws(function() {
					var variables = new Variables();
					variables.getValue('hi', 5);
				});
				assert.throws(function() {
					var variables = new Variables();
					variables.getValue(null, 5);
				});
				assert.throws(function() {
					var variables = new Variables();
					variables.getValue(new Date(), 5);
				});
				assert.throws(function() {
					var variables = new Variables();
					variables.getValue([], 5);
				});
				assert.throws(function() {
					var variables = new Variables();
					variables.getValue({}, 5);
				});
				assert.doesNotThrow(function() {
					var variables = new Variables(5);
					variables.getValue(1, 5);
				});
			},

			"returns root when given root id": function returnsRoot() {
				var variables = new Variables(5),
					root = {hi:'hi'};
				variables.setRoot(root);
				variables.getValue(Variables.ROOT_ID, root);
			},

			"cannot use id larger than initial size": function idSizeIsCorrect() {
				assert.throws(function() {
					var variables = new Variables(5);
					variables.getValue(5, 'hi'); //off by one check
				});
				assert.throws(function() {
					var variables = new Variables(5);
					variables.getValue(6, 'hi');
				});
			},

			"gets the value": function getsTheValue() {
				var variables = new Variables(5);
				variables.setValue(1, 'hi');
				assert.equal(variables.getValue(1), 'hi');
			}
		},

		"#getDocument": {
			"id must be number": function idMustBeNumber() {
				assert.throws(function() {
					var variables = new Variables();
					variables.getDocument('hi', 5);
				});
				assert.throws(function() {
					var variables = new Variables();
					variables.getDocument(null, 5);
				});
				assert.throws(function() {
					var variables = new Variables();
					variables.getDocument(new Date(), 5);
				});
				assert.throws(function() {
					var variables = new Variables();
					variables.getDocument([], 5);
				});
				assert.throws(function() {
					var variables = new Variables();
					variables.getDocument({}, 5);
				});
				assert.doesNotThrow(function() {
					var variables = new Variables(5);
					variables.getDocument(1, 5);
				});
			},

			"returns root when given root id": function returnsRoot() {
				var variables = new Variables(5),
					root = {hi:'hi'};
				variables.setRoot(root);
				variables.getDocument(Variables.ROOT_ID, root);
			},

			"cannot use id larger than initial size": function idSizeIsCorrect() {
				assert.throws(function() {
					var variables = new Variables(5);
					variables.getDocument(5, 'hi'); //off by one check
				});
				assert.throws(function() {
					var variables = new Variables(5);
					variables.getDocument(6, 'hi');
				});
			},

			"gets the value": function getsTheDocument() {
				var variables = new Variables(5),
					value = {hi:'hi'};
				variables.setValue(1, value);
				assert.equal(variables.getDocument(1), value);
			},

			"only returns documents": function returnsOnlyDocs() {
				var variables = new Variables(5),
					value = 'hi';
				variables.setValue(1, value);
				assert.deepEqual(variables.getDocument(1), {});
			}
		}

	}

};

if (!module.parent)(new(require("mocha"))()).ui("exports").reporter("spec").addFile(__filename).run(process.exit);