Add tests for the parse and compare hooks

core/src/test/java/de/jplag/HooksTest.java

@@ -0,0 +1,49 @@
+package de.jplag;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+import de.jplag.exceptions.ExitException;
+
+public class HooksTest extends TestBase {
+    private static final String ROOT = "NoDuplicate";
+    private static final int SUBMISSION_COUNT = 3;
+    private static final int COMPARISON_COUNT = 3;
+
+    @Test
+    void testPreParseHook() throws ExitException {
+        final int[] totalSubmissions = {0};
+        runJPlag(ROOT, it -> it.withPreParseHook(submissions -> {
+            totalSubmissions[0] = submissions.size();
+        }));
+        assertEquals(SUBMISSION_COUNT, totalSubmissions[0]);
+    }
+
+    @Test
+    void testParseHook() throws ExitException {
+        final int[] totalSubmissions = {0};
+        runJPlag(ROOT, it -> it.withParseHook(submission -> {
+            totalSubmissions[0] += 1;
+        }));
+        assertEquals(SUBMISSION_COUNT, totalSubmissions[0]);
+    }
+
+    @Test
+    void testPreCompareHook() throws ExitException {
+        final int[] totalComparisons = {0};
+        runJPlag(ROOT, it -> it.withPreCompareHook(comparisons -> {
+            totalComparisons[0] = comparisons.size();
+        }));
+        assertEquals(COMPARISON_COUNT, totalComparisons[0]);
+    }
+
+    @Test
+    void testCompareHook() throws ExitException {
+        final int[] totalComparisons = {0};
+        runJPlag(ROOT, it -> it.withCompareHook(comparison -> {
+            totalComparisons[0] += 1;
+        }));
+        assertEquals(COMPARISON_COUNT, totalComparisons[0]);
+    }
+}