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authorpants <niklasjo2004@gmail.com>2026-09-21 14:16:34 -0700
committerpants <niklasjo2004@gmail.com>2026-09-21 14:16:34 -0700
commit81ba9eb66f8284d8760012973f84cdbe617ceb94 (patch)
tree466432644e9e3fd66ee183ec53a1f10abb1b7faa /p1/ExampleTesting.java
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+import org.junit.jupiter.api.*;
+import static org.junit.jupiter.api.Assertions.*;
+import java.util.*;
+
+public class Testing {
+ private Repository repo1;
+ private Repository repo2;
+
+ // Occurs before each of the individual test cases
+ // (creates new repos and resets commit ids)
+ @BeforeEach
+ public void setUp() {
+ repo1 = new Repository("repo1");
+ repo2 = new Repository("repo2");
+ Repository.Commit.resetIds();
+ }
+
+ @Test
+ @DisplayName("EXAMPLE TEST - getHistory()")
+ public void getHistory() throws InterruptedException {
+ // Initialize commit messages
+ String[] commitMessages = new String[]{"Initial commit.",
+ "Updated method documentation.",
+ "Removed unnecessary object creation."};
+ commitAll(repo1, commitMessages);
+ testHistory(repo1, 1, commitMessages);
+ }
+
+ @Test
+ @DisplayName("EXAMPLE TEST - drop() (empty case)")
+ public void testDropEmpty() {
+ assertFalse(repo1.drop("123"));
+ }
+
+ @Test
+ @DisplayName("EXAMPLE TEST - drop() (front case)")
+ public void testDropFront() throws InterruptedException {
+ // Initialize commit messages
+ commitAll(repo1, new String[]{"First commit"}); // ID "0"
+ commitAll(repo2, new String[]{"Added unit tests."}); // ID "1"
+
+ // Assert that repo1 successfully dropped "0"
+ assertTrue(repo1.drop("0"));
+ assertEquals(repo1.getRepoSize(), 0);
+
+ // Assert that repo2 does not drop "0" but drops "1"
+ // (Note that the commit ID increments regardless of the repository!)
+ assertFalse(repo2.drop("0"));
+ assertTrue(repo2.drop("1"));
+ assertEquals(repo2.getRepoSize(), 0);
+ }
+
+ @Test
+ @DisplayName("EXAMPLE TEST - synchronize() (one: [1, 2], two: [3, 4])")
+ public void testSynchronizeOne() throws InterruptedException {
+ // Initialize commit messages
+ commitAll(repo1, new String[]{"One", "Two"});
+ commitAll(repo2, new String[]{"Three", "Four"});
+
+ // Make sure both repos got exactly 2 commits each
+ assertEquals(2, repo1.getRepoSize());
+ assertEquals(2, repo2.getRepoSize());
+
+ // Synchronize repo2 into repo1
+ repo1.synchronize(repo2);
+ assertEquals(4, repo1.getRepoSize());
+ assertEquals(0, repo2.getRepoSize());
+
+ // Make sure the history of repo1 is correctly synchronized
+ testHistory(repo1, 4, new String[]{"One", "Two", "Three", "Four"});
+ }
+
+ // Commits all of the provided messages into the provided repo, making sure timestamps
+ // are correctly sequential (no ties). If used, make sure to include
+ // 'throws InterruptedException'
+ // much like we do with 'throws FileNotFoundException'. Example useage:
+ //
+ // repo1:
+ // head -> null
+ // To commit the messages "one", "two", "three", "four"
+ // commitAll(repo1, new String[]{"one", "two", "three", "four"})
+ // This results in the following after picture
+ // repo1:
+ // head -> "four" -> "three" -> "two" -> "one" -> null
+ //
+ // YOU DO NOT NEED TO UNDERSTAND HOW THIS METHOD WORKS TO USE IT!
+ // (this is why documentation is important!)
+ public void commitAll(Repository repo, String[] messages) throws InterruptedException {
+ // Commit all of the provided messages
+ for (String message : messages) {
+ int size = repo.getRepoSize();
+ repo.commit(message);
+
+ // Make sure exactly one commit was added to the repo
+ assertEquals(size + 1, repo.getRepoSize(),
+ String.format("Size not correctly updated after commiting message [%s]",
+ message));
+
+ // Sleep to guarantee that all commits have different time stamps
+ Thread.sleep(2);
+ }
+ }
+
+ // Makes sure the given repositories history is correct up to 'n' commits, checking against
+ // all commits made in order. Example useage:
+ //
+ // repo1:
+ // head -> "four" -> "three" -> "two" -> "one" -> null
+ // (Commits made in the order ["one", "two", "three", "four"])
+ // To test the getHistory() method up to n=3 commits this can be done with:
+ // testHistory(repo1, 3, new String[]{"one", "two", "three", "four"})
+ // Similarly, to test getHistory() up to n=4 commits you'd use:
+ // testHistory(repo1, 4, new String[]{"one", "two", "three", "four"})
+ //
+ // YOU DO NOT NEED TO UNDERSTAND HOW THIS METHOD WORKS TO USE IT!
+ // (this is why documentation is important!)
+ public void testHistory(Repository repo, int n, String[] allCommits) {
+ int totalCommits = repo.getRepoSize();
+ assertTrue(n <= totalCommits,
+ String.format("Provided n [%d] too big. Only [%d] commits",
+ n, totalCommits));
+
+ String[] nCommits = repo.getHistory(n).split("\n");
+
+ assertTrue(nCommits.length <= n,
+ String.format("getHistory(n) returned more than n [%d] commits", n));
+ assertTrue(nCommits.length <= allCommits.length,
+ String.format("Not enough expected commits to check against. " +
+ "Expected at least [%d]. Actual [%d]",
+ n, allCommits.length));
+
+ for (int i = 0; i < n; i++) {
+ String commit = nCommits[i];
+
+ // Old commit messages/ids are on the left and the more recent commit messages/ids are
+ // on the right so need to traverse from right to left
+ int backwardsIndex = totalCommits - 1 - i;
+ String commitMessage = allCommits[backwardsIndex];
+
+ assertTrue(commit.contains(commitMessage),
+ String.format("Commit [%s] doesn't contain expected message [%s]",
+ commit, commitMessage));
+ assertTrue(commit.contains("" + backwardsIndex),
+ String.format("Commit [%s] doesn't contain expected id [%d]",
+ commit, backwardsIndex));
+ }
+ }
+}