test: cover source-version guards in scanner

Author: carstenartur

sandbox_mining_cli/src/test/java/org/sandbox/mining/scanner/SourceScannerTest.java

@@ -0,0 +1,69 @@
+/*******************************************************************************
+ * Copyright (c) 2026 Carsten Hammer.
+ *
+ * This program and the accompanying materials
+ * are made available under the terms of the Eclipse Public License 2.0
+ * which accompanies this distribution, and is available at
+ * https://www.eclipse.org/legal/epl-2.0/
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ *
+ * Contributors:
+ *     Carsten Hammer
+ *******************************************************************************/
+package org.sandbox.mining.scanner;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.List;
+import java.util.Map;
+
+import org.eclipse.jdt.core.JavaCore;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.io.TempDir;
+import org.sandbox.jdt.triggerpattern.api.GuardFunction;
+import org.sandbox.jdt.triggerpattern.api.GuardFunctionResolverHolder;
+import org.sandbox.jdt.triggerpattern.api.HintFile;
+import org.sandbox.jdt.triggerpattern.internal.BuiltInGuards;
+import org.sandbox.jdt.triggerpattern.internal.HintFileParser;
+import org.sandbox.mining.report.MiningReport;
+
+class SourceScannerTest {
+
+	@TempDir
+	Path tempDir;
+
+	@BeforeEach
+	void setUp() {
+		java.util.HashMap<String, GuardFunction> guards = new java.util.HashMap<>();
+		BuiltInGuards.registerAll(guards);
+		GuardFunctionResolverHolder.setResolver(guards::get);
+	}
+
+	@Test
+	void forwardsCompilerOptionsToSourceVersionGuards() throws Exception {
+		Files.writeString(tempDir.resolve("Test.java"), //$NON-NLS-1$
+				"class Test { Object m() { return java.util.Collections.emptyList(); } }", //$NON-NLS-1$
+				StandardCharsets.UTF_8);
+		HintFile hintFile = new HintFileParser().parse("""
+				<!id: source-version-test>
+				java.util.Collections.emptyList() :: sourceVersionGE(9)
+				=> java.util.List.of()
+				;;
+				"""); //$NON-NLS-1$
+		SourceScanner scanner = new SourceScanner(new StandaloneAstParser(), 100);
+
+		MiningReport java8Report = scanner.scan("repo", tempDir, List.of(), List.of(hintFile), //$NON-NLS-1$
+				Map.of(JavaCore.COMPILER_SOURCE, "1.8")); //$NON-NLS-1$
+		MiningReport java21Report = scanner.scan("repo", tempDir, List.of(), List.of(hintFile), //$NON-NLS-1$
+				Map.of(JavaCore.COMPILER_SOURCE, "21")); //$NON-NLS-1$
+
+		assertEquals(0, java8Report.getMatches().size());
+		assertEquals(1, java21Report.getMatches().size());
+		assertEquals("source-version-test1", java21Report.getMatches().get(0).ruleName()); //$NON-NLS-1$
+	}
+}