Add tests for various project root and path config scenarios.

Author: toinehartman

rascal-lsp/src/main/java/org/rascalmpl/vscode/lsp/rascal/model/PathConfigs.java

@@ -265,7 +265,7 @@ private static boolean hasParentSection(URIResolverRegistry reg, ISourceLocation
     /**
      * Infers the root of the project that `member` is in.
      */
-    private static ISourceLocation inferProjectRoot(ISourceLocation member) {
+    /*package*/ static ISourceLocation inferProjectRoot(ISourceLocation member) {
         ISourceLocation lastRoot = member;
         ISourceLocation root;
         do {

rascal-lsp/src/test/java/org/rascalmpl/vscode/lsp/rascal/model/PathConfigsTest.java

@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2018-2025, NWO-I CWI and Swat.engineering
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice,
+ * this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+package org.rascalmpl.vscode.lsp.rascal.model;
+
+import static org.junit.Assert.assertEquals;
+
+import java.io.IOException;
+import java.net.URISyntaxException;
+import java.util.concurrent.Executors;
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.Mock;
+import org.rascalmpl.uri.URIResolverRegistry;
+import org.rascalmpl.values.IRascalValueFactory;
+
+import io.usethesource.vallang.ISourceLocation;
+
+public class PathConfigsTest {
+    private static final IRascalValueFactory VF = IRascalValueFactory.getInstance();
+    private static final URIResolverRegistry reg = URIResolverRegistry.getInstance();
+
+
+    private static void checkRoot(ISourceLocation project, String modulePath) throws URISyntaxException {
+        var m = VF.sourceLocation(project.getScheme(), project.getAuthority(), project.getPath() + "/" + modulePath);
+        var root = PathConfigs.inferProjectRoot(m);
+        assertEquals(project, root);
+    }
+
+    @Mock PathConfigDiagnostics diagnostics;
+    private PathConfigs configs;
+
+    @Before
+    public void setUp() {
+        configs = new PathConfigs(Executors.newCachedThreadPool(), diagnostics);
+    }
+
+    @Test
+    public void standardRoot() throws URISyntaxException {
+        checkRoot(VF.sourceLocation("std", "", ""), "IO.rsc");
+    }
+
+    @Test
+    public void nestedStandardRoot() throws URISyntaxException {
+        checkRoot(VF.sourceLocation("std", "", ""), "util/Maybe.rsc");
+    }
+
+    @Test
+    public void lspRoot() throws URISyntaxException {
+        checkRoot(VF.sourceLocation("cwd", "", ""), "src/main/rascal/library/util/LanguageServer.src");
+    }
+
+    @Test
+    public void lspTargetRoot() throws URISyntaxException {
+        checkRoot(VF.sourceLocation("cwd", "", ""), "target/classes/library/util/LanguageServer.rsc");
+    }
+
+    @Test
+    public void nestedProjectRoot() throws URISyntaxException {
+        checkRoot(VF.sourceLocation("cwd", "", "src/test/resources/project-a"), "src/Module.rsc");
+    }
+
+    @Test
+    public void pathConfigForStandardModule() throws URISyntaxException, IOException {
+        var pcfg = configs.lookupConfig(VF.sourceLocation("std", "", "IO.rsc"));
+        assertEquals(reg.logicalToPhysical(VF.sourceLocation("std", "", "")), pcfg.getProjectRoot());
+    }
+
+    @Test
+    public void pathConfigForLsp() throws URISyntaxException, IOException {
+        var pcfg = configs.lookupConfig(VF.sourceLocation("project", "rascal-lsp", ""));
+        assertEquals(reg.logicalToPhysical(VF.sourceLocation("project", "rascal-lsp", "")), pcfg.getProjectRoot());
+    }
+
+    @Test
+    public void pathConfigForLspModule() throws URISyntaxException, IOException {
+        var pcfg = configs.lookupConfig(VF.sourceLocation("project", "rascal-lsp", "src/main/rascal/library/util/LanguageServer.src"));
+        assertEquals(reg.logicalToPhysical(VF.sourceLocation("project", "rascal-lsp", "")), pcfg.getProjectRoot());
+    }
+}

rascal-lsp/src/test/resources/project-a/META-INF/RASCAL.MF

@@ -0,0 +1,3 @@
+Manifest-Version: 0.0.1
+Project-Name: project-a
+Source: src/