init
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148
p1/ExampleTesting.java
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148
p1/ExampleTesting.java
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import org.junit.jupiter.api.*;
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import static org.junit.jupiter.api.Assertions.*;
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import java.util.*;
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public class Testing {
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private Repository repo1;
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private Repository repo2;
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// Occurs before each of the individual test cases
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// (creates new repos and resets commit ids)
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@BeforeEach
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public void setUp() {
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repo1 = new Repository("repo1");
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repo2 = new Repository("repo2");
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Repository.Commit.resetIds();
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}
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@Test
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@DisplayName("EXAMPLE TEST - getHistory()")
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public void getHistory() throws InterruptedException {
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// Initialize commit messages
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String[] commitMessages = new String[]{"Initial commit.",
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"Updated method documentation.",
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"Removed unnecessary object creation."};
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commitAll(repo1, commitMessages);
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testHistory(repo1, 1, commitMessages);
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}
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@Test
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@DisplayName("EXAMPLE TEST - drop() (empty case)")
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public void testDropEmpty() {
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assertFalse(repo1.drop("123"));
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}
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@Test
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@DisplayName("EXAMPLE TEST - drop() (front case)")
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public void testDropFront() throws InterruptedException {
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// Initialize commit messages
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commitAll(repo1, new String[]{"First commit"}); // ID "0"
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commitAll(repo2, new String[]{"Added unit tests."}); // ID "1"
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// Assert that repo1 successfully dropped "0"
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assertTrue(repo1.drop("0"));
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assertEquals(repo1.getRepoSize(), 0);
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// Assert that repo2 does not drop "0" but drops "1"
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// (Note that the commit ID increments regardless of the repository!)
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assertFalse(repo2.drop("0"));
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assertTrue(repo2.drop("1"));
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assertEquals(repo2.getRepoSize(), 0);
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}
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@Test
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@DisplayName("EXAMPLE TEST - synchronize() (one: [1, 2], two: [3, 4])")
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public void testSynchronizeOne() throws InterruptedException {
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// Initialize commit messages
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commitAll(repo1, new String[]{"One", "Two"});
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commitAll(repo2, new String[]{"Three", "Four"});
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// Make sure both repos got exactly 2 commits each
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assertEquals(2, repo1.getRepoSize());
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assertEquals(2, repo2.getRepoSize());
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// Synchronize repo2 into repo1
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repo1.synchronize(repo2);
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assertEquals(4, repo1.getRepoSize());
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assertEquals(0, repo2.getRepoSize());
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// Make sure the history of repo1 is correctly synchronized
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testHistory(repo1, 4, new String[]{"One", "Two", "Three", "Four"});
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}
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// Commits all of the provided messages into the provided repo, making sure timestamps
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// are correctly sequential (no ties). If used, make sure to include
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// 'throws InterruptedException'
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// much like we do with 'throws FileNotFoundException'. Example useage:
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//
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// repo1:
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// head -> null
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// To commit the messages "one", "two", "three", "four"
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// commitAll(repo1, new String[]{"one", "two", "three", "four"})
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// This results in the following after picture
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// repo1:
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// head -> "four" -> "three" -> "two" -> "one" -> null
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//
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// YOU DO NOT NEED TO UNDERSTAND HOW THIS METHOD WORKS TO USE IT!
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// (this is why documentation is important!)
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public void commitAll(Repository repo, String[] messages) throws InterruptedException {
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// Commit all of the provided messages
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for (String message : messages) {
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int size = repo.getRepoSize();
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repo.commit(message);
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// Make sure exactly one commit was added to the repo
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assertEquals(size + 1, repo.getRepoSize(),
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String.format("Size not correctly updated after commiting message [%s]",
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message));
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// Sleep to guarantee that all commits have different time stamps
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Thread.sleep(2);
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}
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}
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// Makes sure the given repositories history is correct up to 'n' commits, checking against
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// all commits made in order. Example useage:
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//
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// repo1:
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// head -> "four" -> "three" -> "two" -> "one" -> null
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// (Commits made in the order ["one", "two", "three", "four"])
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// To test the getHistory() method up to n=3 commits this can be done with:
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// testHistory(repo1, 3, new String[]{"one", "two", "three", "four"})
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// Similarly, to test getHistory() up to n=4 commits you'd use:
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// testHistory(repo1, 4, new String[]{"one", "two", "three", "four"})
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//
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// YOU DO NOT NEED TO UNDERSTAND HOW THIS METHOD WORKS TO USE IT!
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// (this is why documentation is important!)
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public void testHistory(Repository repo, int n, String[] allCommits) {
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int totalCommits = repo.getRepoSize();
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assertTrue(n <= totalCommits,
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String.format("Provided n [%d] too big. Only [%d] commits",
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n, totalCommits));
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String[] nCommits = repo.getHistory(n).split("\n");
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assertTrue(nCommits.length <= n,
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String.format("getHistory(n) returned more than n [%d] commits", n));
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assertTrue(nCommits.length <= allCommits.length,
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String.format("Not enough expected commits to check against. " +
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"Expected at least [%d]. Actual [%d]",
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n, allCommits.length));
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for (int i = 0; i < n; i++) {
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String commit = nCommits[i];
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// Old commit messages/ids are on the left and the more recent commit messages/ids are
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// on the right so need to traverse from right to left
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int backwardsIndex = totalCommits - 1 - i;
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String commitMessage = allCommits[backwardsIndex];
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assertTrue(commit.contains(commitMessage),
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String.format("Commit [%s] doesn't contain expected message [%s]",
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commit, commitMessage));
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assertTrue(commit.contains("" + backwardsIndex),
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String.format("Commit [%s] doesn't contain expected id [%d]",
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commit, backwardsIndex));
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}
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}
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}
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