Use minZoom and maxZoom olx.source.StamenOptions

src/ol/source/stamensource.js

@@ -105,8 +105,8 @@ ol.source.Stamen = function(options) {
     attributions: ol.source.Stamen.ATTRIBUTIONS,
     cacheSize: options.cacheSize,
     crossOrigin: 'anonymous',
-    maxZoom: providerConfig.maxZoom,
-    minZoom: providerConfig.minZoom,
+    maxZoom: options.maxZoom != undefined ? options.maxZoom : providerConfig.maxZoom,
+    minZoom: options.minZoom != undefined ? options.minZoom : providerConfig.minZoom,
     opaque: layerConfig.opaque,
     reprojectionErrorThreshold: options.reprojectionErrorThreshold,
     tileLoadFunction: options.tileLoadFunction,

test/spec/ol/source/stamensource.test.js

@@ -0,0 +1,28 @@
+goog.provide('ol.test.source.Stamen');
+
+describe('ol.source.Stamen', function() {
+
+  describe('constructor', function() {
+
+    it('can be constructed with a custom minZoom', function() {
+      var source = new ol.source.Stamen({
+        layer: 'watercolor',
+        minZoom: 10
+      });
+      expect(source.getTileGrid().getMinZoom()).to.be(10);
+    });
+
+    it('can be constructed with a custom maxZoom', function() {
+      var source = new ol.source.Stamen({
+        layer: 'watercolor',
+        maxZoom: 8
+      });
+      expect(source.getTileGrid().getMaxZoom()).to.be(8);
+
+    });
+
+  });
+
+});
+
+goog.require('ol.source.Stamen');