mungedb-aggregate/test/lib/pipeline/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/pipeline/matcher/ExistsMatchExpression"),
	MatchDetails = require("../../../../lib/pipeline/matcher/MatchDetails");


module.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) );
		}

	}
};