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      1 /*
      2  * Copyright (C) 2010 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package android.webkit;
     17 
     18 import android.test.AndroidTestCase;
     19 
     20 public class ZoomManagerTest extends AndroidTestCase {
     21 
     22     private ZoomManager zoomManager;
     23 
     24     @Override
     25     public void setUp() {
     26         WebView webView = new WebView(this.getContext());
     27         WebViewClassic webViewClassic = WebViewClassic.fromWebView(webView);
     28         CallbackProxy callbackProxy = new CallbackProxy(this.getContext(), webViewClassic);
     29         zoomManager = new ZoomManager(webViewClassic, callbackProxy);
     30 
     31         zoomManager.init(1.00f);
     32     }
     33 
     34     public void testInit() {
     35         testInit(0.01f);
     36         testInit(1.00f);
     37         testInit(1.25f);
     38     }
     39 
     40     private void testInit(float density) {
     41         zoomManager.init(density);
     42         actualScaleTest(density);
     43         defaultScaleTest(density);
     44         assertEquals(zoomManager.getDefaultMaxZoomScale(), zoomManager.getMaxZoomScale());
     45         assertEquals(zoomManager.getDefaultMinZoomScale(), zoomManager.getMinZoomScale());
     46         assertEquals(density, zoomManager.getTextWrapScale());
     47     }
     48 
     49     public void testUpdateDefaultZoomDensity() {
     50         // test the basic case where the actual values are equal to the defaults
     51         testUpdateDefaultZoomDensity(0.01f);
     52         testUpdateDefaultZoomDensity(1.00f);
     53         testUpdateDefaultZoomDensity(1.25f);
     54     }
     55 
     56     private void testUpdateDefaultZoomDensity(float density) {
     57         zoomManager.updateDefaultZoomDensity(density);
     58         defaultScaleTest(density);
     59     }
     60 
     61     public void testUpdateDefaultZoomDensityWithSmallMinZoom() {
     62         // test the case where the minZoomScale has changed to be < the default
     63         float newDefaultScale = 1.50f;
     64         float minZoomScale = ZoomManager.DEFAULT_MIN_ZOOM_SCALE_FACTOR * newDefaultScale;
     65         WebViewCore.ViewState minViewState = new WebViewCore.ViewState();
     66         minViewState.mMinScale = minZoomScale - 0.1f;
     67         zoomManager.updateZoomRange(minViewState, 0, 0);
     68         zoomManager.updateDefaultZoomDensity(newDefaultScale);
     69         defaultScaleTest(newDefaultScale);
     70     }
     71 
     72     public void testUpdateDefaultZoomDensityWithLargeMinZoom() {
     73         // test the case where the minZoomScale has changed to be > the default
     74         float newDefaultScale = 1.50f;
     75         float minZoomScale = ZoomManager.DEFAULT_MIN_ZOOM_SCALE_FACTOR * newDefaultScale;
     76         WebViewCore.ViewState minViewState = new WebViewCore.ViewState();
     77         minViewState.mMinScale = minZoomScale + 0.1f;
     78         zoomManager.updateZoomRange(minViewState, 0, 0);
     79         zoomManager.updateDefaultZoomDensity(newDefaultScale);
     80         defaultScaleTest(newDefaultScale);
     81     }
     82 
     83     public void testUpdateDefaultZoomDensityWithSmallMaxZoom() {
     84         // test the case where the maxZoomScale has changed to be < the default
     85         float newDefaultScale = 1.50f;
     86         float maxZoomScale = ZoomManager.DEFAULT_MAX_ZOOM_SCALE_FACTOR * newDefaultScale;
     87         WebViewCore.ViewState maxViewState = new WebViewCore.ViewState();
     88         maxViewState.mMaxScale = maxZoomScale - 0.1f;
     89         zoomManager.updateZoomRange(maxViewState, 0, 0);
     90         zoomManager.updateDefaultZoomDensity(newDefaultScale);
     91         defaultScaleTest(newDefaultScale);
     92     }
     93 
     94     public void testUpdateDefaultZoomDensityWithLargeMaxZoom() {
     95         // test the case where the maxZoomScale has changed to be > the default
     96         float newDefaultScale = 1.50f;
     97         float maxZoomScale = ZoomManager.DEFAULT_MAX_ZOOM_SCALE_FACTOR * newDefaultScale;
     98         WebViewCore.ViewState maxViewState = new WebViewCore.ViewState();
     99         maxViewState.mMaxScale = maxZoomScale + 0.1f;
    100         zoomManager.updateZoomRange(maxViewState, 0, 0);
    101         zoomManager.updateDefaultZoomDensity(newDefaultScale);
    102         defaultScaleTest(newDefaultScale);
    103     }
    104 
    105     public void testComputeScaleWithLimits() {
    106         final float maxScale = zoomManager.getMaxZoomScale();
    107         final float minScale = zoomManager.getMinZoomScale();
    108         assertTrue(maxScale > minScale);
    109         assertEquals(maxScale, zoomManager.computeScaleWithLimits(maxScale));
    110         assertEquals(maxScale, zoomManager.computeScaleWithLimits(maxScale + .01f));
    111         assertEquals(minScale, zoomManager.computeScaleWithLimits(minScale));
    112         assertEquals(minScale, zoomManager.computeScaleWithLimits(minScale - .01f));
    113     }
    114 
    115     private void actualScaleTest(float actualScale) {
    116         assertEquals(actualScale, zoomManager.getScale());
    117         assertEquals(1 / actualScale, zoomManager.getInvScale());
    118     }
    119 
    120     private void defaultScaleTest(float defaultScale) {
    121         final float maxDefault = ZoomManager.DEFAULT_MAX_ZOOM_SCALE_FACTOR * defaultScale;
    122         final float minDefault = ZoomManager.DEFAULT_MIN_ZOOM_SCALE_FACTOR * defaultScale;
    123         assertEquals(defaultScale, zoomManager.getDefaultScale());
    124         assertEquals(1 / defaultScale, zoomManager.getInvDefaultScale());
    125         assertEquals(maxDefault, zoomManager.getDefaultMaxZoomScale());
    126         assertEquals(minDefault, zoomManager.getDefaultMinZoomScale());
    127     }
    128 }
    129