mungedb-aggregate/test/lib/matcher/ExistsMatchExpression_test.js

"use strict";
if (!module.parent) return require.cache[__filename] = 0, (new(require("mocha"))()).addFile(__filename).ui("exports").run(process.exit);
var assert = require("assert"),
	ErrorCodes = require("../../../lib/errors").ErrorCodes,
	ExistsMatchExpression = require("../../../lib/matcher/ExistsMatchExpression"),
	MatchDetails = require("../../../lib/matcher/MatchDetails");


exports.ExistsMatchExpression = {

	"should match an element": function() {
		var e = new ExistsMatchExpression();
		var s = e.init("a");

		assert.strictEqual(s.code, ErrorCodes.OK);
		assert.ok( e.matches({"a":5}) );
		assert.ok( e.matches({"a":null}) );
		assert.ok( ! e.matches({"a":{}}) );
	},

	"should match a boolean":function() {
		var e = new ExistsMatchExpression();
		var s = e.init("a");

		assert.strictEqual( s.code, ErrorCodes.OK);
		assert.ok( e.matches({"a":5}) );
		assert.ok( ! e.matches({}) );
	},

	"should match a number":function() {
		var e = new ExistsMatchExpression();
		var s = e.init("a");

		assert.strictEqual( s.code, ErrorCodes.OK);
		assert.ok( e.matches({"a":1}) );
		assert.ok( e.matches({"a":null}) );
		assert.ok( ! e.matches({"b":1}) );
	},

	"should match an array":function() {
		var e = new ExistsMatchExpression();
		var s = e.init("a");

		assert.strictEqual( s.code, ErrorCodes.OK);
		assert.ok( e.matches({"a":[4,5.5]}) );
	},

	"should yield an elemMatchKey":function() {
		var e = new ExistsMatchExpression();
		var s = e.init("a.b");
		var m = new MatchDetails();
		m.requestElemMatchKey();
		assert.strictEqual( s.code, ErrorCodes.OK);

		assert.ok( ! e.matches({"a":1}, m) );
		assert.ok( ! m.hasElemMatchKey() );

		assert.ok( e.matches({"a":{"b":6}}));
		assert.ok( ! m.hasElemMatchKey() );

		assert.ok( e.matches({"a":[2, {"b":7}]}, m) );
		assert.ok( m.hasElemMatchKey() );
		assert.strictEqual("1", m.elemMatchKey() );
	},

	"should handle equivalence":function() {
		var e = new ExistsMatchExpression();
		var s = e.init("a");
		var b = new ExistsMatchExpression();
		assert.strictEqual( s.code, ErrorCodes.OK);
		s = b.init("b");
		assert.strictEqual(s.code, ErrorCodes.OK);
		assert.ok( e.equivalent(e) );
		assert.ok( ! e.equivalent(b) );
	},

};