Merge pull request #1090 from tschaub/symbolizer-z

Add zIndex property to symbolizers.  Symbolizers with the same zIndex (in addition to other properties) are considered equal.  A subsequent change will sort features by symbolizer zIndex before rendering.

src/objectliterals.jsdoc

@@ -692,6 +692,7 @@
  *     point to the center of the icon (positive values shift image left).
  * @property {number|ol.expr.Expression|undefined} yOffset Pixel offset from the
  *     point to the center of the icon (positive values shift image down).
+ * @property {number|ol.expr.Expression|undefined} zIndex Stack order.
  */
 
 /**
@@ -699,6 +700,7 @@
  * @property {string|ol.expr.Expression|undefined} color Fill color as hex color
  *     code.
  * @property {number|ol.expr.Expression|undefined} opacity Opacity (0-1).
+ * @property {number|ol.expr.Expression|undefined} zIndex Stack order.
  */
 
 /**
@@ -719,6 +721,7 @@
  * @property {number|ol.expr.Expression|undefined} size Size in pixels.
  * @property {ol.style.Fill|undefined} fill Fill symbolizer for shape.
  * @property {ol.style.Stroke|undefined} stroke Stroke symbolizer for shape.
+ * @property {number|ol.expr.Expression|undefined} zIndex Stack order.
  */
 
 /**
@@ -727,6 +730,7 @@
  *     color code.
  * @property {number|ol.expr.Expression|undefined} opacity Stroke opacity (0-1).
  * @property {number|ol.expr.Expression|undefined} width Stroke width in pixels.
+ * @property {number|ol.expr.Expression|undefined} zIndex Stack order.
  */
 
 /**
@@ -744,6 +748,7 @@
  * @property {number|ol.expr.Expression|undefined} fontSize Font size in pixels.
  * @property {string|ol.expr.Expression} text Text for the label.
  * @property {number|ol.expr.Expression|undefined} opacity Opacity (0-1).
+ * @property {number|ol.expr.Expression|undefined} zIndex Stack order.
  */
 
 /**

src/ol/style/fillsymbolizer.js

@@ -38,6 +38,15 @@ ol.style.Fill = function(opt_options) {
       (options.opacity instanceof ol.expr.Expression) ?
           options.opacity : new ol.expr.Literal(options.opacity);
 
+  /**
+   * @type {ol.expr.Expression}
+   * @private
+   */
+  this.zIndex_ = !goog.isDefAndNotNull(options.zIndex) ?
+      new ol.expr.Literal(ol.style.FillDefaults.zIndex) :
+      (options.zIndex instanceof ol.expr.Expression) ?
+          options.zIndex : new ol.expr.Literal(options.zIndex);
+
 };
 goog.inherits(ol.style.Fill, ol.style.Symbolizer);
 
@@ -67,9 +76,13 @@ ol.style.Fill.prototype.createLiteral = function(featureOrType) {
     var opacity = Number(ol.expr.evaluateFeature(this.opacity_, feature));
     goog.asserts.assert(!isNaN(opacity), 'opacity must be a number');
 
+    var zIndex = Number(ol.expr.evaluateFeature(this.zIndex_, feature));
+    goog.asserts.assert(!isNaN(zIndex), 'zIndex must be a number');
+
     literal = new ol.style.PolygonLiteral({
       fillColor: color,
-      fillOpacity: opacity
+      fillOpacity: opacity,
+      zIndex: zIndex
     });
   }
 
@@ -95,6 +108,15 @@ ol.style.Fill.prototype.getOpacity = function() {
 };
 
 
+/**
+ * Get the fill zIndex.
+ * @return {ol.expr.Expression} Fill zIndex.
+ */
+ol.style.Fill.prototype.getZIndex = function() {
+  return this.zIndex_;
+};
+
+
 /**
  * Set the fill color.
  * @param {ol.expr.Expression} color Fill color.
@@ -116,10 +138,22 @@ ol.style.Fill.prototype.setOpacity = function(opacity) {
 
 
 /**
- * @typedef {{color: (string),
+ * Set the fill zIndex.
- *            opacity: (number)}}
+ * @param {ol.expr.Expression} zIndex Fill zIndex.
+ */
+ol.style.Fill.prototype.setZIndex = function(zIndex) {
+  goog.asserts.assertInstanceof(zIndex, ol.expr.Expression);
+  this.zIndex_ = zIndex;
+};
+
+
+/**
+ * @typedef {{fillColor: string,
+ *            fillOpacity: number,
+ *            zIndex: number}}
  */
 ol.style.FillDefaults = {
   color: '#ffffff',
-  opacity: 0.4
+  opacity: 0.4,
+  zIndex: 0
 };

src/ol/style/iconliteral.js

@@ -1,5 +1,6 @@
 goog.provide('ol.style.IconLiteral');
 
+goog.require('goog.asserts');
 goog.require('ol.style.PointLiteral');
 
 
@@ -10,7 +11,8 @@ goog.require('ol.style.PointLiteral');
  *            opacity: number,
  *            rotation: number,
  *            xOffset: number,
- *            yOffset: number}}
+ *            yOffset: number,
+ *            zIndex: number}}
  */
 ol.style.IconLiteralOptions;
 
@@ -44,6 +46,11 @@ ol.style.IconLiteral = function(options) {
   /** @type {number} */
   this.yOffset = options.yOffset;
 
+  goog.asserts.assertNumber(
+      options.zIndex, 'zIndex must be a number');
+  /** @type {number} */
+  this.zIndex = options.zIndex;
+
 };
 goog.inherits(ol.style.IconLiteral, ol.style.PointLiteral);
 
@@ -51,12 +58,13 @@ goog.inherits(ol.style.IconLiteral, ol.style.PointLiteral);
 /**
  * @inheritDoc
  */
-ol.style.IconLiteral.prototype.equals = function(iconLiteral) {
+ol.style.IconLiteral.prototype.equals = function(other) {
-  return this.url == iconLiteral.url &&
+  return this.url == other.url &&
-      this.width == iconLiteral.width &&
+      this.width == other.width &&
-      this.height == iconLiteral.height &&
+      this.height == other.height &&
-      this.opacity == iconLiteral.opacity &&
+      this.opacity == other.opacity &&
-      this.rotation == iconLiteral.rotation &&
+      this.rotation == other.rotation &&
-      this.xOffset == iconLiteral.xOffset &&
+      this.xOffset == other.xOffset &&
-      this.yOffset == iconLiteral.yOffset;
+      this.yOffset == other.yOffset &&
+      this.zIndex == other.zIndex;
 };

src/ol/style/iconsymbolizer.js

@@ -81,6 +81,15 @@ ol.style.Icon = function(options) {
       (options.yOffset instanceof ol.expr.Expression) ?
           options.yOffset : new ol.expr.Literal(options.yOffset);
 
+  /**
+   * @type {ol.expr.Expression}
+   * @private
+   */
+  this.zIndex_ = !goog.isDefAndNotNull(options.zIndex) ?
+      new ol.expr.Literal(ol.style.IconDefaults.zIndex) :
+      (options.zIndex instanceof ol.expr.Expression) ?
+          options.zIndex : new ol.expr.Literal(options.zIndex);
+
 };
 
 
@@ -130,6 +139,9 @@ ol.style.Icon.prototype.createLiteral = function(featureOrType) {
     var yOffset = Number(ol.expr.evaluateFeature(this.yOffset_, feature));
     goog.asserts.assert(!isNaN(yOffset), 'yOffset must be a number');
 
+    var zIndex = Number(ol.expr.evaluateFeature(this.zIndex_, feature));
+    goog.asserts.assert(!isNaN(zIndex), 'zIndex must be a number');
+
     literal = new ol.style.IconLiteral({
       url: url,
       width: width,
@@ -137,7 +149,8 @@ ol.style.Icon.prototype.createLiteral = function(featureOrType) {
       opacity: opacity,
       rotation: rotation,
       xOffset: xOffset,
-      yOffset: yOffset
+      yOffset: yOffset,
+      zIndex: zIndex
     });
   }
 
@@ -208,6 +221,15 @@ ol.style.Icon.prototype.getYOffset = function() {
 };
 
 
+/**
+ * Get the zIndex.
+ * @return {ol.expr.Expression} Icon zIndex.
+ */
+ol.style.Icon.prototype.getZIndex = function() {
+  return this.zIndex_;
+};
+
+
 /**
  * Set the height.
  * @param {ol.expr.Expression} height Icon height.
@@ -278,15 +300,27 @@ ol.style.Icon.prototype.setYOffset = function(yOffset) {
 };
 
 
+/**
+ * Set the zIndex.
+ * @param {ol.expr.Expression} zIndex Icon zIndex.
+ */
+ol.style.Icon.prototype.setZIndex = function(zIndex) {
+  goog.asserts.assertInstanceof(zIndex, ol.expr.Expression);
+  this.zIndex_ = zIndex;
+};
+
+
 /**
  * @typedef {{opacity: number,
  *            rotation: number,
  *            xOffset: number,
- *            yOffset: number}}
+ *            yOffset: number,
+ *            zIndex: number}}
  */
 ol.style.IconDefaults = {
   opacity: 1,
   rotation: 0,
   xOffset: 0,
-  yOffset: 0
+  yOffset: 0,
+  zIndex: 0
 };

src/ol/style/lineliteral.js

@@ -5,9 +5,10 @@ goog.require('ol.style.Literal');
 
 
 /**
- * @typedef {{color: (string),
+ * @typedef {{color: string,
- *            opacity: (number),
+ *            opacity: number,
- *            width: (number)}}
+ *            width: number,
+ *            zIndex: number}}
  */
 ol.style.LineLiteralOptions;
 
@@ -36,6 +37,11 @@ ol.style.LineLiteral = function(options) {
   /** @type {number} */
   this.width = options.width;
 
+  goog.asserts.assertNumber(
+      options.zIndex, 'zIndex must be a number');
+  /** @type {number} */
+  this.zIndex = options.zIndex;
+
 };
 goog.inherits(ol.style.LineLiteral, ol.style.Literal);
 
@@ -43,8 +49,9 @@ goog.inherits(ol.style.LineLiteral, ol.style.Literal);
 /**
  * @inheritDoc
  */
-ol.style.LineLiteral.prototype.equals = function(lineLiteral) {
+ol.style.LineLiteral.prototype.equals = function(other) {
-  return this.color == lineLiteral.color &&
+  return this.color == other.color &&
-      this.opacity == lineLiteral.opacity &&
+      this.opacity == other.opacity &&
-      this.width == lineLiteral.width;
+      this.width == other.width &&
+      this.zIndex == other.zIndex;
 };

src/ol/style/polygonliteral.js

@@ -9,7 +9,8 @@ goog.require('ol.style.Literal');
  *            fillOpacity: (number|undefined),
  *            strokeColor: (string|undefined),
  *            strokeOpacity: (number|undefined),
- *            strokeWidth: (number|undefined)}}
+ *            strokeWidth: (number|undefined),
+ *            zIndex: number}}
  */
 ol.style.PolygonLiteralOptions;
 
@@ -66,6 +67,11 @@ ol.style.PolygonLiteral = function(options) {
       'Either fillColor and fillOpacity or ' +
       'strokeColor and strokeOpacity and strokeWidth must be set');
 
+  goog.asserts.assertNumber(
+      options.zIndex, 'zIndex must be a number');
+  /** @type {number} */
+  this.zIndex = options.zIndex;
+
 };
 goog.inherits(ol.style.PolygonLiteral, ol.style.Literal);
 
@@ -73,10 +79,11 @@ goog.inherits(ol.style.PolygonLiteral, ol.style.Literal);
 /**
  * @inheritDoc
  */
-ol.style.PolygonLiteral.prototype.equals = function(polygonLiteral) {
+ol.style.PolygonLiteral.prototype.equals = function(other) {
-  return this.fillColor == polygonLiteral.fillColor &&
+  return this.fillColor == other.fillColor &&
-      this.fillOpacity == polygonLiteral.fillOpacity &&
+      this.fillOpacity == other.fillOpacity &&
-      this.strokeColor == polygonLiteral.strokeColor &&
+      this.strokeColor == other.strokeColor &&
-      this.strokeOpacity == polygonLiteral.strokeOpacity &&
+      this.strokeOpacity == other.strokeOpacity &&
-      this.strokeWidth == polygonLiteral.strokeWidth;
+      this.strokeWidth == other.strokeWidth &&
+      this.zIndex == other.zIndex;
 };

src/ol/style/shapeliteral.js

@@ -20,7 +20,8 @@ ol.style.ShapeType = {
  *            fillOpacity: (number|undefined),
  *            strokeColor: (string|undefined),
  *            strokeOpacity: (number|undefined),
- *            strokeWidth: (number|undefined)}}
+ *            strokeWidth: (number|undefined),
+ *            zIndex: number}}
  */
 ol.style.ShapeLiteralOptions;
 
@@ -84,6 +85,11 @@ ol.style.ShapeLiteral = function(options) {
       'Either fillColor and fillOpacity or ' +
       'strokeColor and strokeOpacity and strokeWidth must be set');
 
+  goog.asserts.assertNumber(
+      options.zIndex, 'zIndex must be a number');
+  /** @type {number} */
+  this.zIndex = options.zIndex;
+
 };
 goog.inherits(ol.style.ShapeLiteral, ol.style.PointLiteral);
 
@@ -91,12 +97,13 @@ goog.inherits(ol.style.ShapeLiteral, ol.style.PointLiteral);
 /**
  * @inheritDoc
  */
-ol.style.ShapeLiteral.prototype.equals = function(shapeLiteral) {
+ol.style.ShapeLiteral.prototype.equals = function(other) {
-  return this.type == shapeLiteral.type &&
+  return this.type == other.type &&
-      this.size == shapeLiteral.size &&
+      this.size == other.size &&
-      this.fillColor == shapeLiteral.fillColor &&
+      this.fillColor == other.fillColor &&
-      this.fillOpacity == shapeLiteral.fillOpacity &&
+      this.fillOpacity == other.fillOpacity &&
-      this.strokeColor == shapeLiteral.strokeColor &&
+      this.strokeColor == other.strokeColor &&
-      this.strokeOpacity == shapeLiteral.strokeOpacity &&
+      this.strokeOpacity == other.strokeOpacity &&
-      this.strokeWidth == shapeLiteral.strokeWidth;
+      this.strokeWidth == other.strokeWidth &&
+      this.zIndex == other.zIndex;
 };

src/ol/style/shapesymbolizer.js

@@ -53,6 +53,15 @@ ol.style.Shape = function(options) {
   goog.asserts.assert(this.fill_ || this.stroke_,
       'Stroke or fill must be provided');
 
+  /**
+   * @type {ol.expr.Expression}
+   * @private
+   */
+  this.zIndex_ = !goog.isDefAndNotNull(options.zIndex) ?
+      new ol.expr.Literal(ol.style.ShapeDefaults.zIndex) :
+      (options.zIndex instanceof ol.expr.Expression) ?
+          options.zIndex : new ol.expr.Literal(options.zIndex);
+
 };
 
 
@@ -100,6 +109,9 @@ ol.style.Shape.prototype.createLiteral = function(featureOrType) {
       goog.asserts.assert(!isNaN(strokeWidth), 'strokeWidth must be a number');
     }
 
+    var zIndex = Number(ol.expr.evaluateFeature(this.zIndex_, feature));
+    goog.asserts.assert(!isNaN(zIndex), 'zIndex must be a number');
+
     literal = new ol.style.ShapeLiteral({
       type: this.type_,
       size: size,
@@ -107,7 +119,8 @@ ol.style.Shape.prototype.createLiteral = function(featureOrType) {
       fillOpacity: fillOpacity,
       strokeColor: strokeColor,
       strokeOpacity: strokeOpacity,
-      strokeWidth: strokeWidth
+      strokeWidth: strokeWidth,
+      zIndex: zIndex
     });
   }
 
@@ -151,6 +164,15 @@ ol.style.Shape.prototype.getType = function() {
 };
 
 
+/**
+ * Get the shape zIndex.
+ * @return {ol.expr.Expression} Shape zIndex.
+ */
+ol.style.Shape.prototype.getZIndex = function() {
+  return this.zIndex_;
+};
+
+
 /**
  * Set the fill.
  * @param {ol.style.Fill} fill Shape fill.
@@ -195,10 +217,22 @@ ol.style.Shape.prototype.setType = function(type) {
 
 
 /**
- * @typedef {{type: (ol.style.ShapeType),
+ * Set the shape zIndex.
- *            size: (number)}}
+ * @param {ol.expr.Expression} zIndex Shape zIndex.
+ */
+ol.style.Shape.prototype.setZIndex = function(zIndex) {
+  goog.asserts.assertInstanceof(zIndex, ol.expr.Expression);
+  this.zIndex_ = zIndex;
+};
+
+
+/**
+ * @typedef {{type: ol.style.ShapeType,
+ *            size: number,
+ *            zIndex: number}}
  */
 ol.style.ShapeDefaults = {
   type: ol.style.ShapeType.CIRCLE,
-  size: 5
+  size: 5,
+  zIndex: 0
 };

src/ol/style/strokesymbolizer.js

@@ -49,6 +49,15 @@ ol.style.Stroke = function(opt_options) {
       (options.width instanceof ol.expr.Expression) ?
           options.width : new ol.expr.Literal(options.width);
 
+  /**
+   * @type {ol.expr.Expression}
+   * @private
+   */
+  this.zIndex_ = !goog.isDefAndNotNull(options.zIndex) ?
+      new ol.expr.Literal(ol.style.StrokeDefaults.zIndex) :
+      (options.zIndex instanceof ol.expr.Expression) ?
+          options.zIndex : new ol.expr.Literal(options.zIndex);
+
 };
 goog.inherits(ol.style.Stroke, ol.style.Symbolizer);
 
@@ -79,20 +88,25 @@ ol.style.Stroke.prototype.createLiteral = function(featureOrType) {
       this.width_, feature));
   goog.asserts.assert(!isNaN(width), 'width must be a number');
 
+  var zIndex = Number(ol.expr.evaluateFeature(this.zIndex_, feature));
+  goog.asserts.assert(!isNaN(zIndex), 'zIndex must be a number');
+
   var literal = null;
   if (type === ol.geom.GeometryType.LINESTRING ||
       type === ol.geom.GeometryType.MULTILINESTRING) {
     literal = new ol.style.LineLiteral({
       color: color,
       opacity: opacity,
-      width: width
+      width: width,
+      zIndex: zIndex
     });
   } else if (type === ol.geom.GeometryType.POLYGON ||
       type === ol.geom.GeometryType.MULTIPOLYGON) {
     literal = new ol.style.PolygonLiteral({
       strokeColor: color,
       strokeOpacity: opacity,
-      strokeWidth: width
+      strokeWidth: width,
+      zIndex: zIndex
     });
   }
 
@@ -127,6 +141,15 @@ ol.style.Stroke.prototype.getWidth = function() {
 };
 
 
+/**
+ * Get the stroke zIndex.
+ * @return {ol.expr.Expression} Stroke zIndex.
+ */
+ol.style.Stroke.prototype.getZIndex = function() {
+  return this.zIndex_;
+};
+
+
 /**
  * Set the stroke color.
  * @param {ol.expr.Expression} color Stroke color.
@@ -158,24 +181,24 @@ ol.style.Stroke.prototype.setWidth = function(width) {
 
 
 /**
- * @typedef {{color: (string),
+ * Set the stroke zIndex.
- *            opacity: (number),
+ * @param {ol.expr.Expression} zIndex Stroke zIndex.
- *            width: (number)}}
  */
-ol.style.StrokeDefaults = {
+ol.style.Stroke.prototype.setZIndex = function(zIndex) {
-  color: '#696969',
+  goog.asserts.assertInstanceof(zIndex, ol.expr.Expression);
-  opacity: 0.75,
+  this.zIndex_ = zIndex;
-  width: 1.5
 };
 
 
 /**
- * @typedef {{color: (string),
+ * @typedef {{strokeColor: string,
- *            opacity: (number),
+ *            strokeOpacity: number,
- *            width: (number)}}
+ *            strokeWidth: number,
+ *            zIndex: number}}
  */
-ol.style.StrokeDefaultsSelect = {
+ol.style.StrokeDefaults = {
   color: '#696969',
-  opacity: 0.9,
+  opacity: 0.75,
-  width: 2.0
+  width: 1.5,
+  zIndex: 0
 };

src/ol/style/textliteral.js

@@ -9,7 +9,8 @@ goog.require('ol.style.Literal');
  *            fontFamily: string,
  *            fontSize: number,
  *            text: string,
- *            opacity: number}}
+ *            opacity: number,
+ *            zIndex: number}}
  */
 ol.style.TextLiteralOptions;
 
@@ -42,6 +43,10 @@ ol.style.TextLiteral = function(options) {
   /** @type {number} */
   this.opacity = options.opacity;
 
+  goog.asserts.assertNumber(options.zIndex, 'zIndex must be a number');
+  /** @type {number} */
+  this.zIndex = options.zIndex;
+
 };
 goog.inherits(ol.style.TextLiteral, ol.style.Literal);
 
@@ -49,9 +54,10 @@ goog.inherits(ol.style.TextLiteral, ol.style.Literal);
 /**
  * @inheritDoc
  */
-ol.style.TextLiteral.prototype.equals = function(textLiteral) {
+ol.style.TextLiteral.prototype.equals = function(other) {
-  return this.color == textLiteral.color &&
+  return this.color == other.color &&
-      this.fontFamily == textLiteral.fontFamily &&
+      this.fontFamily == other.fontFamily &&
-      this.fontSize == textLiteral.fontSize &&
+      this.fontSize == other.fontSize &&
-      this.opacity == textLiteral.opacity;
+      this.opacity == other.opacity &&
+      this.zIndex == other.zIndex;
 };

src/ol/style/textsymbolizer.js

@@ -60,6 +60,15 @@ ol.style.Text = function(options) {
       (options.opacity instanceof ol.expr.Expression) ?
           options.opacity : new ol.expr.Literal(options.opacity);
 
+  /**
+   * @type {ol.expr.Expression}
+   * @private
+   */
+  this.zIndex_ = !goog.isDefAndNotNull(options.zIndex) ?
+      new ol.expr.Literal(ol.style.TextDefaults.zIndex) :
+      (options.zIndex instanceof ol.expr.Expression) ?
+          options.zIndex : new ol.expr.Literal(options.zIndex);
+
 };
 goog.inherits(ol.style.Text, ol.style.Symbolizer);
 
@@ -93,12 +102,16 @@ ol.style.Text.prototype.createLiteral = function(featureOrType) {
   var opacity = Number(ol.expr.evaluateFeature(this.opacity_, feature));
   goog.asserts.assert(!isNaN(opacity), 'opacity must be a number');
 
+  var zIndex = Number(ol.expr.evaluateFeature(this.zIndex_, feature));
+  goog.asserts.assert(!isNaN(zIndex), 'zIndex must be a number');
+
   return new ol.style.TextLiteral({
     color: color,
     fontFamily: fontFamily,
     fontSize: fontSize,
     text: text,
-    opacity: opacity
+    opacity: opacity,
+    zIndex: zIndex
   });
 };
 
@@ -148,6 +161,15 @@ ol.style.Text.prototype.getText = function() {
 };
 
 
+/**
+ * Get the zIndex.
+ * @return {ol.expr.Expression} Text.
+ */
+ol.style.Text.prototype.getZIndex = function() {
+  return this.zIndex_;
+};
+
+
 /**
  * Set the font color.
  * @param {ol.expr.Expression} color Font color.
@@ -198,15 +220,27 @@ ol.style.Text.prototype.setText = function(text) {
 };
 
 
+/**
+ * Set the zIndex.
+ * @param {ol.expr.Expression} zIndex Text.
+ */
+ol.style.Text.prototype.setZIndex = function(zIndex) {
+  goog.asserts.assertInstanceof(zIndex, ol.expr.Expression);
+  this.zIndex_ = zIndex;
+};
+
+
 /**
  * @typedef {{color: string,
  *            fontFamily: string,
  *            fontSize: number,
- *            opacity: number}}
+ *            opacity: number,
+ *            zIndex: number}}
  */
 ol.style.TextDefaults = {
   color: '#000',
   fontFamily: 'sans-serif',
   fontSize: 10,
-  opacity: 1
+  opacity: 1,
+  zIndex: 0
 };

test/spec/ol/style/fillsymbolizer.test.js

@@ -19,6 +19,15 @@ describe('ol.style.Fill', function() {
       expect(symbolizer).to.be.a(ol.style.Fill);
     });
 
+    it('accepts zIndex', function() {
+      var symbolizer = new ol.style.Fill({
+        opacity: ol.expr.parse('value / 100'),
+        color: ol.expr.parse('fillAttr'),
+        zIndex: 3
+      });
+      expect(symbolizer).to.be.a(ol.style.Fill);
+    });
+
   });
 
   describe('#createLiteral()', function() {
@@ -40,6 +49,7 @@ describe('ol.style.Fill', function() {
       expect(literal).to.be.a(ol.style.PolygonLiteral);
       expect(literal.fillOpacity).to.be(42 / 100);
       expect(literal.fillColor).to.be('#ff0000');
+      expect(literal.zIndex).to.be(0);
     });
 
     it('applies default opacity', function() {
@@ -81,6 +91,46 @@ describe('ol.style.Fill', function() {
       expect(literal.fillOpacity).to.be(0.55);
     });
 
+    it('handles zIndex', function() {
+      var symbolizer = new ol.style.Fill({
+        opacity: 0.8,
+        zIndex: 2
+      });
+
+      var literal = symbolizer.createLiteral(ol.geom.GeometryType.POLYGON);
+      expect(literal).to.be.a(ol.style.PolygonLiteral);
+      expect(literal.fillColor).to.be('#ffffff');
+      expect(literal.fillOpacity).to.be(0.8);
+      expect(literal.zIndex).to.be(2);
+    });
+
+    it('applies default zIndex', function() {
+      var symbolizer = new ol.style.Fill({
+        opacity: 0.8
+      });
+
+      var literal = symbolizer.createLiteral(ol.geom.GeometryType.POLYGON);
+      expect(literal).to.be.a(ol.style.PolygonLiteral);
+      expect(literal.zIndex).to.be(0);
+    });
+
+    it('casts zIndex to number', function() {
+      var symbolizer = new ol.style.Fill({
+        zIndex: ol.expr.parse('zIndex'),
+        color: '#ff00ff'
+      });
+
+      var feature = new ol.Feature({
+        zIndex: '11',
+        geometry: new ol.geom.Polygon(
+            [[[0, 0], [1, 0], [1, 1], [0, 1], [0, 0]]])
+      });
+
+      var literal = symbolizer.createLiteral(feature);
+      expect(literal).to.be.a(ol.style.PolygonLiteral);
+      expect(literal.zIndex).to.be(11);
+    });
+
   });
 
   describe('#getColor()', function() {
@@ -112,6 +162,21 @@ describe('ol.style.Fill', function() {
 
   });
 
+  describe('#getZIndex()', function() {
+
+    it('returns the zIndex', function() {
+      var symbolizer = new ol.style.Fill({
+        color: '#ffffff',
+        zIndex: 11
+      });
+
+      var zIndex = symbolizer.getZIndex();
+      expect(zIndex).to.be.a(ol.expr.Literal);
+      expect(zIndex.getValue()).to.be(11);
+    });
+
+  });
+
   describe('#setColor()', function() {
 
     it('sets the fill color', function() {

test/spec/ol/style/iconliteral.test.js

@@ -10,56 +10,72 @@ describe('ol.style.IconLiteral', function() {
         width: 20,
         opacity: 1,
         rotation: 0.1,
-        url: 'http://example.com/1.png'
+        url: 'http://example.com/1.png',
+        zIndex: 0
       });
       var equalLiteral = new ol.style.IconLiteral({
         height: 10,
         width: 20,
         opacity: 1,
         rotation: 0.1,
-        url: 'http://example.com/1.png'
+        url: 'http://example.com/1.png',
+        zIndex: 0
       });
-      var differentLiteral1 = new ol.style.IconLiteral({
+      var differentHeight = new ol.style.IconLiteral({
         height: 11,
         width: 20,
         opacity: 1,
         rotation: 0.1,
-        url: 'http://example.com/1.png'
+        url: 'http://example.com/1.png',
+        zIndex: 0
       });
-      var differentLiteral2 = new ol.style.IconLiteral({
+      var differentWidth = new ol.style.IconLiteral({
         height: 10,
         width: 2,
         opacity: 1,
         rotation: 0.1,
-        url: 'http://example.com/1.png'
+        url: 'http://example.com/1.png',
+        zIndex: 0
       });
-      var differentLiteral3 = new ol.style.IconLiteral({
+      var differentOpacity = new ol.style.IconLiteral({
         height: 10,
         width: 20,
         opacity: 0.5,
         rotation: 0.1,
-        url: 'http://example.com/1.png'
+        url: 'http://example.com/1.png',
+        zIndex: 0
       });
-      var differentLiteral4 = new ol.style.IconLiteral({
+      var differentRotation = new ol.style.IconLiteral({
         height: 10,
         width: 20,
         opacity: 1,
         rotation: 0.2,
-        url: 'http://example.com/1.png'
+        url: 'http://example.com/1.png',
+        zIndex: 0
       });
-      var differentLiteral5 = new ol.style.IconLiteral({
+      var differentUrl = new ol.style.IconLiteral({
         height: 10,
         width: 20,
         opacity: 1,
         rotation: 0.1,
-        url: 'http://example.com/2.png'
+        url: 'http://example.com/2.png',
+        zIndex: 0
+      });
+      var differentZIndex = new ol.style.IconLiteral({
+        height: 10,
+        width: 20,
+        opacity: 1,
+        rotation: 0.1,
+        url: 'http://example.com/1.png',
+        zIndex: 20
       });
       expect(literal.equals(equalLiteral)).to.be(true);
-      expect(literal.equals(differentLiteral1)).to.be(false);
+      expect(literal.equals(differentHeight)).to.be(false);
-      expect(literal.equals(differentLiteral2)).to.be(false);
+      expect(literal.equals(differentWidth)).to.be(false);
-      expect(literal.equals(differentLiteral3)).to.be(false);
+      expect(literal.equals(differentOpacity)).to.be(false);
-      expect(literal.equals(differentLiteral4)).to.be(false);
+      expect(literal.equals(differentRotation)).to.be(false);
-      expect(literal.equals(differentLiteral5)).to.be(false);
+      expect(literal.equals(differentUrl)).to.be(false);
+      expect(literal.equals(differentZIndex)).to.be(false);
     });
 
   });

test/spec/ol/style/iconsymbolizer.test.js

@@ -30,6 +30,18 @@ describe('ol.style.Icon', function() {
       expect(symbolizer).to.be.a(ol.style.Icon);
     });
 
+    it('accepts zIndex', function() {
+      var symbolizer = new ol.style.Icon({
+        height: ol.expr.parse('10'),
+        width: ol.expr.parse('20'),
+        opacity: ol.expr.parse('1'),
+        rotation: ol.expr.parse('0.1'),
+        url: ol.expr.parse('"http://example.com/1.png"'),
+        zIndex: 3
+      });
+      expect(symbolizer).to.be.a(ol.style.Icon);
+    });
+
   });
 
   describe('#createLiteral()', function() {
@@ -65,6 +77,7 @@ describe('ol.style.Icon', function() {
       expect(literal.xOffset).to.be(20);
       expect(literal.yOffset).to.be(30);
       expect(literal.url).to.be('http://example.com/1.png');
+      expect(literal.zIndex).to.be(0);
     });
 
     it('can be called without a feature', function() {
@@ -223,6 +236,49 @@ describe('ol.style.Icon', function() {
       expect(literal.yOffset).to.be(42);
     });
 
+    it('handles zIndex', function() {
+      var symbolizer = new ol.style.Icon({
+        height: ol.expr.parse('10'),
+        width: ol.expr.parse('20'),
+        url: ol.expr.parse('"http://example.com/1.png"'),
+        zIndex: 4
+      });
+
+      var literal = symbolizer.createLiteral(ol.geom.GeometryType.POINT);
+      expect(literal).to.be.a(ol.style.IconLiteral);
+      expect(literal.xOffset).to.be(0);
+      expect(literal.zIndex).to.be(4);
+    });
+
+    it('applies default zIndex if none', function() {
+      var symbolizer = new ol.style.Icon({
+        height: 10,
+        width: 20,
+        url: 'http://example.com/1.png'
+      });
+
+      var literal = symbolizer.createLiteral(ol.geom.GeometryType.POINT);
+      expect(literal).to.be.a(ol.style.IconLiteral);
+      expect(literal.zIndex).to.be(0);
+    });
+
+    it('casts zIndex to number', function() {
+      var symbolizer = new ol.style.Icon({
+        zIndex: ol.expr.parse('zIndex'),
+        width: 10,
+        url: 'http://example.com/1.png'
+      });
+
+      var feature = new ol.Feature({
+        zIndex: '42',
+        geometry: new ol.geom.Point([1, 2])
+      });
+
+      var literal = symbolizer.createLiteral(feature);
+      expect(literal).to.be.a(ol.style.IconLiteral);
+      expect(literal.zIndex).to.be(42);
+    });
+
   });
 
   describe('#getHeight()', function() {

test/spec/ol/style/lineliteral.test.js

@@ -8,32 +8,44 @@ describe('ol.style.LineLiteral', function() {
       var literal = new ol.style.LineLiteral({
         width: 3,
         color: '#BADA55',
-        opacity: 1
+        opacity: 1,
+        zIndex: 0
       });
       var equalLiteral = new ol.style.LineLiteral({
         color: '#BADA55',
         width: 3,
-        opacity: 1
+        opacity: 1,
+        zIndex: 0
       });
       var differentColor = new ol.style.LineLiteral({
         width: 3,
         color: '#ff0000',
-        opacity: 1
+        opacity: 1,
+        zIndex: 0
       });
       var differentWidth = new ol.style.LineLiteral({
         width: 3.5,
         color: '#BADA55',
-        opacity: 1
+        opacity: 1,
+        zIndex: 0
       });
       var differentOpacity = new ol.style.LineLiteral({
         width: 3,
         color: '#BADA55',
-        opacity: 0.5
+        opacity: 0.5,
+        zIndex: 0
+      });
+      var differentZIndex = new ol.style.LineLiteral({
+        width: 3,
+        color: '#BADA55',
+        opacity: 1,
+        zIndex: 3
       });
       expect(literal.equals(equalLiteral)).to.be(true);
       expect(literal.equals(differentColor)).to.be(false);
       expect(literal.equals(differentWidth)).to.be(false);
       expect(literal.equals(differentOpacity)).to.be(false);
+      expect(literal.equals(differentZIndex)).to.be(false);
     });
 
   });

test/spec/ol/style/polygonliteral.test.js

@@ -10,49 +10,64 @@ describe('ol.style.PolygonLiteral', function() {
         strokeColor: '#013',
         strokeOpacity: 0.4,
         fillColor: '#BADA55',
-        fillOpacity: 0.3
+        fillOpacity: 0.3,
+        zIndex: 0
       });
       var equalLiteral = new ol.style.PolygonLiteral({
         strokeWidth: 3,
         strokeColor: '#013',
         strokeOpacity: 0.4,
         fillColor: '#BADA55',
-        fillOpacity: 0.3
+        fillOpacity: 0.3,
+        zIndex: 0
       });
       var differentStrokeWidth = new ol.style.PolygonLiteral({
         strokeWidth: 5,
         strokeColor: '#013',
         strokeOpacity: 0.4,
         fillColor: '#BADA55',
-        fillOpacity: 0.3
+        fillOpacity: 0.3,
+        zIndex: 0
       });
       var differentStrokeColor = new ol.style.PolygonLiteral({
         strokeWidth: 3,
         strokeColor: '#ffff00',
         strokeOpacity: 0.4,
         fillColor: '#BADA55',
-        fillOpacity: 0.3
+        fillOpacity: 0.3,
+        zIndex: 0
       });
       var differentStrokeOpacity = new ol.style.PolygonLiteral({
         strokeWidth: 3,
         strokeColor: '#013',
         strokeOpacity: 0.41,
         fillColor: '#BADA55',
-        fillOpacity: 0.3
+        fillOpacity: 0.3,
+        zIndex: 0
       });
       var differentFillColor = new ol.style.PolygonLiteral({
         strokeWidth: 3,
         strokeColor: '#013',
         strokeOpacity: 0.4,
         fillColor: '#00ffff',
-        fillOpacity: 0.3
+        fillOpacity: 0.3,
+        zIndex: 0
       });
       var differentFillOpacity = new ol.style.PolygonLiteral({
         strokeWidth: 3,
         strokeColor: '#013',
         strokeOpacity: 0.4,
         fillColor: '#BADA55',
-        fillOpacity: 0.31
+        fillOpacity: 0.31,
+        zIndex: 0
+      });
+      var differentZIndex = new ol.style.PolygonLiteral({
+        strokeWidth: 3,
+        strokeColor: '#013',
+        strokeOpacity: 0.4,
+        fillColor: '#BADA55',
+        fillOpacity: 0.3,
+        zIndex: 2
       });
       expect(literal.equals(equalLiteral)).to.be(true);
       expect(literal.equals(differentStrokeWidth)).to.be(false);
@@ -60,6 +75,7 @@ describe('ol.style.PolygonLiteral', function() {
       expect(literal.equals(differentStrokeOpacity)).to.be(false);
       expect(literal.equals(differentFillColor)).to.be(false);
       expect(literal.equals(differentFillOpacity)).to.be(false);
+      expect(literal.equals(differentZIndex)).to.be(false);
     });
 
   });

test/spec/ol/style/shapeliteral.test.js

@@ -12,7 +12,8 @@ describe('ol.style.ShapeLiteral', function() {
         fillOpacity: 0.9,
         strokeColor: '#013',
         strokeOpacity: 0.8,
-        strokeWidth: 3
+        strokeWidth: 3,
+        zIndex: 0
       });
       var equalLiteral = new ol.style.ShapeLiteral({
         type: ol.style.ShapeType.CIRCLE,
@@ -21,7 +22,8 @@ describe('ol.style.ShapeLiteral', function() {
         fillOpacity: 0.9,
         strokeColor: '#013',
         strokeOpacity: 0.8,
-        strokeWidth: 3
+        strokeWidth: 3,
+        zIndex: 0
       });
       var differentSize = new ol.style.ShapeLiteral({
         type: ol.style.ShapeType.CIRCLE,
@@ -30,7 +32,8 @@ describe('ol.style.ShapeLiteral', function() {
         fillOpacity: 0.9,
         strokeColor: '#013',
         strokeOpacity: 0.8,
-        strokeWidth: 3
+        strokeWidth: 3,
+        zIndex: 0
       });
       var differentFillColor = new ol.style.ShapeLiteral({
         type: ol.style.ShapeType.CIRCLE,
@@ -39,7 +42,8 @@ describe('ol.style.ShapeLiteral', function() {
         fillOpacity: 0.9,
         strokeColor: '#013',
         strokeOpacity: 0.8,
-        strokeWidth: 3
+        strokeWidth: 3,
+        zIndex: 0
       });
       var differentFillOpacity = new ol.style.ShapeLiteral({
         type: ol.style.ShapeType.CIRCLE,
@@ -48,7 +52,8 @@ describe('ol.style.ShapeLiteral', function() {
         fillOpacity: 0.8,
         strokeColor: '#013',
         strokeOpacity: 0.8,
-        strokeWidth: 3
+        strokeWidth: 3,
+        zIndex: 0
       });
       var differentStrokeColor = new ol.style.ShapeLiteral({
         type: ol.style.ShapeType.CIRCLE,
@@ -57,7 +62,8 @@ describe('ol.style.ShapeLiteral', function() {
         fillOpacity: 0.9,
         strokeColor: '#ffffff',
         strokeOpacity: 0.8,
-        strokeWidth: 3
+        strokeWidth: 3,
+        zIndex: 0
       });
       var differentStrokeOpacity = new ol.style.ShapeLiteral({
         type: ol.style.ShapeType.CIRCLE,
@@ -66,7 +72,8 @@ describe('ol.style.ShapeLiteral', function() {
         fillOpacity: 0.9,
         strokeColor: '#013',
         strokeOpacity: 0.7,
-        strokeWidth: 3
+        strokeWidth: 3,
+        zIndex: 0
       });
       var differentStrokeWidth = new ol.style.ShapeLiteral({
         type: ol.style.ShapeType.CIRCLE,
@@ -75,7 +82,18 @@ describe('ol.style.ShapeLiteral', function() {
         fillOpacity: 0.9,
         strokeColor: '#013',
         strokeOpacity: 0.8,
-        strokeWidth: 4
+        strokeWidth: 4,
+        zIndex: 0
+      });
+      var differentZIndex = new ol.style.ShapeLiteral({
+        type: ol.style.ShapeType.CIRCLE,
+        size: 4,
+        fillColor: '#BADA55',
+        fillOpacity: 0.9,
+        strokeColor: '#013',
+        strokeOpacity: 0.8,
+        strokeWidth: 3,
+        zIndex: -1
       });
       expect(literal.equals(equalLiteral)).to.be(true);
       expect(literal.equals(differentSize)).to.be(false);
@@ -84,6 +102,7 @@ describe('ol.style.ShapeLiteral', function() {
       expect(literal.equals(differentStrokeColor)).to.be(false);
       expect(literal.equals(differentStrokeOpacity)).to.be(false);
       expect(literal.equals(differentStrokeWidth)).to.be(false);
+      expect(literal.equals(differentZIndex)).to.be(false);
     });
 
   });

test/spec/ol/style/shapesymbolizer.test.js

@@ -24,6 +24,17 @@ describe('ol.style.Shape', function() {
       expect(symbolizer).to.be.a(ol.style.Shape);
     });
 
+    it('accepts zIndex', function() {
+      var symbolizer = new ol.style.Shape({
+        size: 4,
+        fill: new ol.style.Fill({
+          color: '#ff0000'
+        }),
+        zIndex: -1
+      });
+      expect(symbolizer).to.be.a(ol.style.Shape);
+    });
+
   });
 
   describe('#createLiteral()', function() {
@@ -47,6 +58,7 @@ describe('ol.style.Shape', function() {
       expect(literal).to.be.a(ol.style.ShapeLiteral);
       expect(literal.size).to.be(42);
       expect(literal.fillOpacity).to.be(0.4);
+      expect(literal.zIndex).to.be(0);
     });
 
     it('can be called without a feature', function() {
@@ -160,6 +172,37 @@ describe('ol.style.Shape', function() {
       expect(literal.fillOpacity).to.be(0.42);
     });
 
+    it('handles zIndex', function() {
+      var symbolizer = new ol.style.Shape({
+        stroke: new ol.style.Stroke({
+          color: '#ff0000'
+        }),
+        zIndex: -2
+      });
+
+      var literal = symbolizer.createLiteral(ol.geom.GeometryType.POINT);
+      expect(literal).to.be.a(ol.style.ShapeLiteral);
+      expect(literal.zIndex).to.be(-2);
+    });
+
+    it('casts zIndex to number', function() {
+      var symbolizer = new ol.style.Shape({
+        fill: new ol.style.Fill({
+          color: '#BADA55'
+        }),
+        zIndex: ol.expr.parse('zIndex')
+      });
+
+      var feature = new ol.Feature({
+        zIndex: '42',
+        geometry: new ol.geom.Point([1, 2])
+      });
+
+      var literal = symbolizer.createLiteral(feature);
+      expect(literal).to.be.a(ol.style.ShapeLiteral);
+      expect(literal.zIndex).to.be(42);
+    });
+
   });
 
   describe('#getFill()', function() {

test/spec/ol/style/strokesymbolizer.test.js

@@ -20,6 +20,15 @@ describe('ol.style.Stroke', function() {
       expect(symbolizer).to.be.a(ol.style.Stroke);
     });
 
+    it('accepts zIndex', function() {
+      var symbolizer = new ol.style.Stroke({
+        opacity: ol.expr.parse('value / 100'),
+        width: ol.expr.parse('widthAttr'),
+        zIndex: 5
+      });
+      expect(symbolizer).to.be.a(ol.style.Stroke);
+    });
+
   });
 
   describe('#createLiteral()', function() {
@@ -40,6 +49,7 @@ describe('ol.style.Stroke', function() {
       expect(literal).to.be.a(ol.style.LineLiteral);
       expect(literal.opacity).to.be(42 / 100);
       expect(literal.width).to.be(1.5);
+      expect(literal.zIndex).to.be(0);
     });
 
     it('applies the default values', function() {
@@ -50,6 +60,7 @@ describe('ol.style.Stroke', function() {
       expect(literal.color).to.be('#696969');
       expect(literal.opacity).to.be(0.75);
       expect(literal.width).to.be(1.5);
+      expect(literal.zIndex).to.be(0);
     });
 
   });

test/spec/ol/style/style.test.js

@@ -194,12 +194,14 @@ describe('ol.style.Style', function() {
       var literals = [
         new ol.style.PolygonLiteral({
           fillColor: '#ff0000',
-          fillOpacity: 0.5
+          fillOpacity: 0.5,
+          zIndex: 0
         }),
         new ol.style.PolygonLiteral({
           strokeColor: '#00ff00',
           strokeOpacity: 0.6,
-          strokeWidth: 3
+          strokeWidth: 3,
+          zIndex: 0
         })
       ];
 
@@ -221,12 +223,14 @@ describe('ol.style.Style', function() {
           fillOpacity: 0.5,
           strokeColor: '#00ff00',
           strokeOpacity: 0.6,
-          strokeWidth: 3
+          strokeWidth: 3,
+          zIndex: 0
         }),
         new ol.style.PolygonLiteral({
           strokeColor: '#0000ff',
           strokeOpacity: 0.7,
-          strokeWidth: 1
+          strokeWidth: 1,
+          zIndex: 0
         })
       ];
 
@@ -253,18 +257,21 @@ describe('ol.style.Style', function() {
         new ol.style.PolygonLiteral({
           strokeColor: '#00ff00',
           strokeOpacity: 0.6,
-          strokeWidth: 3
+          strokeWidth: 3,
+          zIndex: 0
         }),
         new ol.style.PolygonLiteral({
           fillColor: '#ff0000',
-          fillOpacity: 0.5
+          fillOpacity: 0.5,
+          zIndex: 0
         }),
         new ol.style.TextLiteral({
           color: '#ffffff',
           fontFamily: 'Arial',
           fontSize: 11,
           text: 'Test',
-          opacity: 0.5
+          opacity: 0.5,
+          zIndex: 0
         })
       ];
 

test/spec/ol/style/textliteral.test.js

@@ -10,56 +10,72 @@ describe('ol.style.TextLiteral', function() {
         fontFamily: 'Arial',
         fontSize: 11,
         text: 'Test',
-        opacity: 0.5
+        opacity: 0.5,
+        zIndex: 0
       });
       var equalLiteral = new ol.style.TextLiteral({
         color: '#ff0000',
         fontFamily: 'Arial',
         fontSize: 11,
         text: 'Test',
-        opacity: 0.5
+        opacity: 0.5,
+        zIndex: 0
       });
-      var differentLiteral1 = new ol.style.TextLiteral({
+      var differentColor = new ol.style.TextLiteral({
         color: '#0000ff',
         fontFamily: 'Arial',
         fontSize: 11,
         text: 'Test',
-        opacity: 0.5
+        opacity: 0.5,
+        zIndex: 0
       });
-      var differentLiteral2 = new ol.style.TextLiteral({
+      var differentFontFamily = new ol.style.TextLiteral({
         color: '#ff0000',
         fontFamily: 'Dingbats',
         fontSize: 11,
         text: 'Test',
-        opacity: 0.5
+        opacity: 0.5,
+        zIndex: 0
       });
-      var differentLiteral3 = new ol.style.TextLiteral({
+      var differentFontSize = new ol.style.TextLiteral({
         color: '#ff0000',
         fontFamily: 'Arial',
         fontSize: 12,
         text: 'Test',
-        opacity: 0.5
+        opacity: 0.5,
+        zIndex: 0
       });
-      var differentLiteral4 = new ol.style.TextLiteral({
+      var differentOpacity = new ol.style.TextLiteral({
         color: '#ff0000',
         fontFamily: 'Arial',
         fontSize: 11,
         text: 'Test',
-        opacity: 0.6
+        opacity: 0.6,
+        zIndex: 0
       });
       var equalLiteral2 = new ol.style.TextLiteral({
         color: '#ff0000',
         fontFamily: 'Arial',
         fontSize: 11,
         text: 'Text is not compared for equality',
-        opacity: 0.5
+        opacity: 0.5,
+        zIndex: 0
+      });
+      var differentZIndex = new ol.style.TextLiteral({
+        color: '#ff0000',
+        fontFamily: 'Arial',
+        fontSize: 11,
+        text: 'Test',
+        opacity: 0.5,
+        zIndex: 3
       });
       expect(literal.equals(equalLiteral)).to.be(true);
-      expect(literal.equals(differentLiteral1)).to.be(false);
+      expect(literal.equals(differentColor)).to.be(false);
-      expect(literal.equals(differentLiteral2)).to.be(false);
+      expect(literal.equals(differentFontFamily)).to.be(false);
-      expect(literal.equals(differentLiteral3)).to.be(false);
+      expect(literal.equals(differentFontSize)).to.be(false);
-      expect(literal.equals(differentLiteral4)).to.be(false);
+      expect(literal.equals(differentOpacity)).to.be(false);
       expect(literal.equals(equalLiteral2)).to.be(true);
+      expect(literal.equals(differentZIndex)).to.be(false);
     });
 
   });

test/spec/ol/style/textsymbolizer.test.js

@@ -26,6 +26,18 @@ describe('ol.style.Text', function() {
       expect(symbolizer).to.be.a(ol.style.Text);
     });
 
+    it('accepts zIndex', function() {
+      var symbolizer = new ol.style.Text({
+        color: '#ff0000',
+        fontFamily: 'Arial',
+        fontSize: 11,
+        text: 'Test',
+        opacity: 0.6,
+        zIndex: 3
+      });
+      expect(symbolizer).to.be.a(ol.style.Text);
+    });
+
   });
 
   describe('#createLiteral()', function() {