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Android example source code file (ViewAsserts.java)
The ViewAsserts.java Android example source code/* * 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 view is horizontally center aligned * with respect to the <code>reference 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 view is vertically center aligned * with respect to the <code>reference 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); } } } } Other Android examples (source code examples)Here is a short list of links related to this Android ViewAsserts.java source code file: |
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