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Official Cloudant client for Java
/*
* Copyright (c) 2015 IBM Corp. All rights reserved.
*
* 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 com.cloudant.tests;
import static org.junit.Assert.assertEquals;
import com.cloudant.client.api.Database;
import com.cloudant.client.api.views.Key;
import com.cloudant.client.api.views.ViewRequest;
import com.cloudant.client.api.views.ViewResponse;
import com.cloudant.tests.util.CheckPagination;
import com.cloudant.tests.util.CloudantClientResource;
import com.cloudant.tests.util.DatabaseResource;
import com.cloudant.tests.util.Utils;
import org.junit.Before;
import org.junit.ClassRule;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import java.util.ArrayList;
import java.util.List;
@RunWith(Parameterized.class)
public class ViewPaginationTests {
/**
* Parameters for these tests so we run each test multiple times.
* We run with a single key or a complex key and both ascending and descending.
*/
@Parameterized.Parameters(name = "Key:{0},Descending:{1},Stateless:{2}")
public static Iterable data() {
boolean[] tf = new boolean[]{true, false};
List parameters = new ArrayList();
for (CheckPagination.Type type : CheckPagination.Type.values()) {
for (boolean descending : tf) {
for (boolean stateless : tf) {
parameters.add(new Object[]{type, descending, stateless});
}
}
}
return parameters;
}
@Parameterized.Parameter
public CheckPagination.Type type;
@Parameterized.Parameter(value = 1)
public boolean descending;
@Parameterized.Parameter(value = 2)
public boolean stateless;
@ClassRule
public static CloudantClientResource clientResource = new CloudantClientResource();
@Rule
public DatabaseResource dbResource = new DatabaseResource(clientResource);
private Database db;
@Before
public void setUp() throws Exception {
db = dbResource.get();
Utils.putDesignDocs(db);
}
/**
* Check that we can page through a view where the number of results
* is an exact multiple of the number of pages. Check each page contains the documents
* we expect.
*
* Page forward to the last page, back to the first page, forward to the last page and back to
* the first page.
*/
@Test
public void allTheWayInEachDirectionTwice() throws Exception {
CheckPagination.newTest(type)
.descending(descending)
.docCount(6)
.docsPerPage(2)
.pageToPages(3, 1, 3, 1)
.stateless(stateless)
.runTest(db);
}
/**
* Check that we can page through a view where the number of results
* is not an exact multiple of the number of pages. Check each page contains the documents
* we expect.
*
* Page forward to the last page, back to the first page, forward to the last page and back to
* the first page.
*/
@Test
public void partialLastPageAllTheWayInEachDirectionTwice() throws Exception {
CheckPagination.newTest(type)
.descending(descending)
.docCount(5)
.docsPerPage(2)
.pageToPages(3, 1, 3, 1)
.stateless(stateless)
.runTest(db);
}
/**
* Check that we can page through a view where the number of results
* is an exact multiple of the number of pages. Check each page contains the documents
* we expect.
*
* Page part way forward, and part way back a few times before paging to the last page.
*/
@Test
public void partWayInEachDirection() throws Exception {
CheckPagination.newTest(type)
.descending(descending)
.docCount(30)
.docsPerPage(5)
.pageToPages(4, 2, 5, 3, 4, 2, 6)
.stateless(stateless)
.runTest(db);
}
/**
* Check that we can page through a view where the number of results
* is not an exact multiple of the number of pages. Check each page contains the documents
* we expect.
*
* Page part way forward, and part way back a few times before paging to the last page.
*/
@Test
public void partialLastPagePartWayInEachDirection() throws Exception {
CheckPagination.newTest(type)
.descending(descending)
.docCount(28)
.docsPerPage(5)
.pageToPages(4, 2, 5, 3, 4, 2, 6)
.stateless(stateless)
.runTest(db);
}
/**
* Check that we can page through a view where we use start and end keys.
* Assert that we don't exceed the limits of those keys.
*/
@Test
public void startAndEndKeyLimits() throws Exception {
startAndEndKeyLimits(true);
}
/**
* Check that we can page through a view where we use start and end keys.
* Assert that we don't exceed the limits of those keys.
*/
@Test
public void startAndEndKeyLimitsExclusiveEnd() throws Exception {
startAndEndKeyLimits(false);
}
private void startAndEndKeyLimits(boolean inclusiveEnd) throws Exception {
//use the CheckPagination to set-up for this test, but we need to do running differently
//since this page is not just simple paging
CheckPagination cp = CheckPagination.newTest(type)
.descending(descending)
.docCount(20)
.docsPerPage(4)
.stateless(stateless);
cp.initTest(db);
// set up the start and end keys based on the test type
// if we are descending then the start and end keys need to be reversed
// if we are exclusive end then we need to change the expected end key
// then run the test with the correct request and limits
if (CheckPagination.Type.SINGLE.equals(type)) {
String startKey = (descending) ? "011" : "003";
String endKey = (descending) ? "003" : "011";
String expectedEndKey = (inclusiveEnd) ? endKey : ((descending) ? "004" : "010");
ViewRequest request = db.getViewRequestBuilder("example", "foo")
.newPaginatedRequest(Key.Type.STRING, String.class).reduce(false).descending
(descending).inclusiveEnd(inclusiveEnd).rowsPerPage(4).startKey
(startKey).endKey(endKey).build();
runStartAndEndKeyLimits(request, startKey, expectedEndKey);
} else {
//for multi we will use the creator_created view
Key.ComplexKey startKey = (descending) ? Key.complex("uuid").add(1011) : Key.complex
("uuid").add(1003);
Key.ComplexKey endKey = (descending) ? Key.complex("uuid").add(1003) : Key.complex
("uuid").add(1011);
Key.ComplexKey expectedEndKey = (inclusiveEnd) ? endKey : ((descending) ? Key.complex
("uuid").add(1004) : Key.complex("uuid").add(1010));
ViewRequest request = db.getViewRequestBuilder("example",
"creator_created")
.newPaginatedRequest(Key.Type.COMPLEX, String.class).reduce(false).descending
(descending).inclusiveEnd(inclusiveEnd).rowsPerPage(4).startKey
(startKey).endKey(endKey).build();
runStartAndEndKeyLimits(request, startKey, expectedEndKey);
}
}
private void runStartAndEndKeyLimits(ViewRequest request, T expectedStartKey,
T expectedEndKey)
throws Exception {
ViewResponse page = request.getResponse();
//check the start key is as expected
assertEquals("The start key should be " + expectedStartKey, expectedStartKey, page
.getKeys().get(0));
//get the last page
while (page.hasNextPage()) {
if (stateless) {
page = request.getResponse(page.getNextPageToken());
} else {
page = page.nextPage();
}
}
//check the end key is as expected
assertEquals("The end key should be " + expectedEndKey, expectedEndKey, page.getKeys()
.get(page.getKeys()
.size()
- 1));
//now page backwards and ensure the last key we get is the start key
while (page.hasPreviousPage()) {
if (stateless) {
page = request.getResponse(page.getPreviousPageToken());
} else {
page = page.previousPage();
}
}
//check the start key is as expected
assertEquals("The start key should be " + expectedStartKey, expectedStartKey, page
.getKeys().get(0));
}
}