/*
* Copyright (C) 2007 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package android.test;
import static junit.framework.Assert.*;
import android.view.View;
import android.view.ViewGroup;
/**
* Some useful assertions about views.
*/
public class ViewAsserts {
private ViewAsserts() {}
/**
* Assert that view is on the screen.
* @param origin The root view of the screen.
* @param view The view.
*/
static public void assertOnScreen(View origin, View view) {
int[] xy = new int[2];
view.getLocationOnScreen(xy);
int[] xyRoot = new int[2];
origin.getLocationOnScreen(xyRoot);
int y = xy[1] - xyRoot[1];
assertTrue("view should have positive y coordinate on screen",
y >= 0);
assertTrue("view should have y location on screen less than drawing "
+ "height of root view",
y <= view.getRootView().getHeight());
}
/**
* Assert that view is below the visible screen.
* @param origin The root view of the screen.
* @param view The view
*/
static public void assertOffScreenBelow(View origin, View view) {
int[] xy = new int[2];
view.getLocationOnScreen(xy);
int[] xyRoot = new int[2];
origin.getLocationOnScreen(xyRoot);
int y = xy[1] - xyRoot[1];
assertTrue("view should have y location on screen greater than drawing "
+ "height of origen view (" + y + " is not greater than "
+ origin.getHeight() + ")",
y > origin.getHeight());
}
/**
* Assert that view is above the visible screen.
* @param origin Te root view of the screen.
* @param view The view
*/
static public void assertOffScreenAbove(View origin, View view) {
int[] xy = new int[2];
view.getLocationOnScreen(xy);
int[] xyRoot = new int[2];
origin.getLocationOnScreen(xyRoot);
int y = xy[1] - xyRoot[1];
assertTrue("view should have y location less than that of origin view",
y < 0);
}
/**
* Assert that a view has a particular x and y position on the visible screen.
* @param origin The root view of the screen.
* @param view The view.
* @param x The expected x coordinate.
* @param y The expected y coordinate.
*/
static public void assertHasScreenCoordinates(View origin, View view, int x, int y) {
int[] xy = new int[2];
view.getLocationOnScreen(xy);
int[] xyRoot = new int[2];
origin.getLocationOnScreen(xyRoot);
assertEquals("x coordinate", x, xy[0] - xyRoot[0]);
assertEquals("y coordinate", y, xy[1] - xyRoot[1]);
}
/**
* Assert that two views are aligned on their baseline, that is that their baselines
* are on the same y location.
*
* @param first The first view
* @param second The second view
*/
static public void assertBaselineAligned(View first, View second) {
int[] xy = new int[2];
first.getLocationOnScreen(xy);
int firstTop = xy[1] + first.getBaseline();
second.getLocationOnScreen(xy);
int secondTop = xy[1] + second.getBaseline();
assertEquals("views are not baseline aligned", firstTop, secondTop);
}
/**
* Assert that two views are right aligned, that is that their right edges
* are on the same x location.
*
* @param first The first view
* @param second The second view
*/
static public void assertRightAligned(View first, View second) {
int[] xy = new int[2];
first.getLocationOnScreen(xy);
int firstRight = xy[0] + first.getMeasuredWidth();
second.getLocationOnScreen(xy);
int secondRight = xy[0] + second.getMeasuredWidth();
assertEquals("views are not right aligned", firstRight, secondRight);
}
/**
* Assert that two views are right aligned, that is that their right edges
* are on the same x location, with respect to the specified margin.
*
* @param first The first view
* @param second The second view
* @param margin The margin between the first view and the second view
*/
static public void assertRightAligned(View first, View second, int margin) {
int[] xy = new int[2];
first.getLocationOnScreen(xy);
int firstRight = xy[0] + first.getMeasuredWidth();
second.getLocationOnScreen(xy);
int secondRight = xy[0] + second.getMeasuredWidth();
assertEquals("views are not right aligned", Math.abs(firstRight - secondRight), margin);
}
/**
* Assert that two views are left aligned, that is that their left edges
* are on the same x location.
*
* @param first The first view
* @param second The second view
*/
static public void assertLeftAligned(View first, View second) {
int[] xy = new int[2];
first.getLocationOnScreen(xy);
int firstLeft = xy[0];
second.getLocationOnScreen(xy);
int secondLeft = xy[0];
assertEquals("views are not left aligned", firstLeft, secondLeft);
}
/**
* Assert that two views are left aligned, that is that their left edges
* are on the same x location, with respect to the specified margin.
*
* @param first The first view
* @param second The second view
* @param margin The margin between the first view and the second view
*/
static public void assertLeftAligned(View first, View second, int margin) {
int[] xy = new int[2];
first.getLocationOnScreen(xy);
int firstLeft = xy[0];
second.getLocationOnScreen(xy);
int secondLeft = xy[0];
assertEquals("views are not left aligned", Math.abs(firstLeft - secondLeft), margin);
}
/**
* Assert that two views are bottom aligned, that is that their bottom edges
* are on the same y location.
*
* @param first The first view
* @param second The second view
*/
static public void assertBottomAligned(View first, View second) {
int[] xy = new int[2];
first.getLocationOnScreen(xy);
int firstBottom = xy[1] + first.getMeasuredHeight();
second.getLocationOnScreen(xy);
int secondBottom = xy[1] + second.getMeasuredHeight();
assertEquals("views are not bottom aligned", firstBottom, secondBottom);
}
/**
* Assert that two views are bottom aligned, that is that their bottom edges
* are on the same y location, with respect to the specified margin.
*
* @param first The first view
* @param second The second view
* @param margin The margin between the first view and the second view
*/
static public void assertBottomAligned(View first, View second, int margin) {
int[] xy = new int[2];
first.getLocationOnScreen(xy);
int firstBottom = xy[1] + first.getMeasuredHeight();
second.getLocationOnScreen(xy);
int secondBottom = xy[1] + second.getMeasuredHeight();
assertEquals("views are not bottom aligned", Math.abs(firstBottom - secondBottom), margin);
}
/**
* Assert that two views are top aligned, that is that their top edges
* are on the same y location.
*
* @param first The first view
* @param second The second view
*/
static public void assertTopAligned(View first, View second) {
int[] xy = new int[2];
first.getLocationOnScreen(xy);
int firstTop = xy[1];
second.getLocationOnScreen(xy);
int secondTop = xy[1];
assertEquals("views are not top aligned", firstTop, secondTop);
}
/**
* Assert that two views are top aligned, that is that their top edges
* are on the same y location, with respect to the specified margin.
*
* @param first The first view
* @param second The second view
* @param margin The margin between the first view and the second view
*/
static public void assertTopAligned(View first, View second, int margin) {
int[] xy = new int[2];
first.getLocationOnScreen(xy);
int firstTop = xy[1];
second.getLocationOnScreen(xy);
int secondTop = xy[1];
assertEquals("views are not top aligned", Math.abs(firstTop - secondTop), margin);
}
/**
* Assert that the <code>test</code> view is horizontally center aligned
* with respect to the <code>reference</code> view.
*
* @param reference The reference view
* @param test The view that should be center aligned with the reference view
*/
static public void assertHorizontalCenterAligned(View reference, View test) {
int[] xy = new int[2];
reference.getLocationOnScreen(xy);
int referenceLeft = xy[0];
test.getLocationOnScreen(xy);
int testLeft = xy[0];
int center = (reference.getMeasuredWidth() - test.getMeasuredWidth()) / 2;
int delta = testLeft - referenceLeft;
assertEquals("views are not horizontally center aligned", center, delta);
}
/**
* Assert that the <code>test</code> view is vertically center aligned
* with respect to the <code>reference</code> view.
*
* @param reference The reference view
* @param test The view that should be center aligned with the reference view
*/
static public void assertVerticalCenterAligned(View reference, View test) {
int[] xy = new int[2];
reference.getLocationOnScreen(xy);
int referenceTop = xy[1];
test.getLocationOnScreen(xy);
int testTop = xy[1];
int center = (reference.getMeasuredHeight() - test.getMeasuredHeight()) / 2;
int delta = testTop - referenceTop;
assertEquals("views are not vertically center aligned", center, delta);
}
/**
* Assert the specified group's integrity. The children count should be >= 0 and each
* child should be non-null.
*
* @param parent The group whose integrity to check
*/
static public void assertGroupIntegrity(ViewGroup parent) {
final int count = parent.getChildCount();
assertTrue("child count should be >= 0", count >= 0);
for (int i = 0; i < count; i++) {
assertNotNull("group should not contain null children", parent.getChildAt(i));
assertSame(parent, parent.getChildAt(i).getParent());
}
}
/**
* Assert that the specified group contains a specific child once and only once.
*
* @param parent The group
* @param child The child that should belong to group
*/
static public void assertGroupContains(ViewGroup parent, View child) {
final int count = parent.getChildCount();
assertTrue("Child count should be >= 0", count >= 0);
boolean found = false;
for (int i = 0; i < count; i++) {
if (parent.getChildAt(i) == child) {
if (!found) {
found = true;
} else {
assertTrue("child " + child + " is duplicated in parent", false);
}
}
}
assertTrue("group does not contain " + child, found);
}
/**
* Assert that the specified group does not contain a specific child.
*
* @param parent The group
* @param child The child that should not belong to group
*/
static public void assertGroupNotContains(ViewGroup parent, View child) {
final int count = parent.getChildCount();
assertTrue("Child count should be >= 0", count >= 0);
for (int i = 0; i < count; i++) {
if (parent.getChildAt(i) == child) {
assertTrue("child " + child + " is found in parent", false);
}
}
}
}
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