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test/unit/health_check.js

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+'use strict';
+
+require('../helper');
+
+var assert      = require('assert');
+var HealthCheck = require('../../app/monitoring/health_check');
+
+var metadataBackend = {};
+
+function PSQL(dbParams) {
+    this.params = dbParams;
+}
+
+var healthCheck = new HealthCheck(metadataBackend, PSQL);
+
+describe('health checks', function() {
+
+    it('errors if disabled file exists', function(done) {
+      var fs = require('fs');
+
+      var readFileFn = fs.readFile;
+      fs.readFile = function(filename, callback) {
+        callback(null, "Maintenance");
+      };
+      healthCheck.check(function(err) {
+        assert.equal(err.message, "Maintenance");
+        assert.equal(err.http_status, 503);
+        fs.readFile = readFileFn;
+        done();
+      });
+    });
+
+    it('does not err if disabled file does not exists', function(done) {
+      var fs = require('fs');
+
+      var readFileFn = fs.readFile;
+      fs.readFile = function(filename, callback) {
+        callback(new Error("ENOENT"), null);
+      };
+      healthCheck.check(function(err) {
+        assert.equal(err, null);
+        fs.readFile = readFileFn;
+        done();
+      });
+    });
+
+});