require leading slash on basePath

src/server/config/__tests__/schema.js

@@ -0,0 +1,38 @@
+import schemaProvider from '../schema';
+import expect from 'expect.js';
+import Joi from 'joi';
+
+describe('Config schema', function () {
+  let schema;
+  beforeEach(() => schema = schemaProvider());
+
+  function validate(data, options) {
+    return Joi.validate(data, schema, options);
+  }
+
+  describe('server', function () {
+    describe('basePath', function () {
+      it('accepts empty strings', function () {
+        const { error } = validate({ server: { basePath: '' }});
+        expect(error == null).to.be.ok();
+      });
+
+      it('accepts strings with leading slashes', function () {
+        const { error } = validate({ server: { basePath: '/path' }});
+        expect(error == null).to.be.ok();
+      });
+
+      it('rejects strings with trailing slashes', function () {
+        const { error } = validate({ server: { basePath: '/path/' }});
+        expect(error).to.have.property('details');
+        expect(error.details[0]).to.have.property('path', 'server.basePath');
+      });
+
+      it('rejects strings without leading slashes', function () {
+        const { error } = validate({ server: { basePath: 'path' }});
+        expect(error).to.have.property('details');
+        expect(error.details[0]).to.have.property('path', 'server.basePath');
+      });
+    });
+  });
+});

src/server/config/schema.js

@@ -30,7 +30,7 @@ module.exports = () => Joi.object({
     port: Joi.number().default(5601),
     autoListen: Joi.boolean().default(true),
     defaultRoute: Joi.string(),
-    basePath: Joi.string().default('').allow('').regex(/[^\/]$/, 'no trailing slashes'),
+    basePath: Joi.string().default('').allow('').regex(/(^$|^\/.*[^\/]$)/, `start with a slash, don't end with one`),
     ssl: Joi.object({
       cert: Joi.string(),
       key: Joi.string()