test: Add Callgraph Signature Tests

plugin/callgraph/fixtures/testJavaArguments.java

@@ -0,0 +1,65 @@
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+import java.awt.Canvas;
+import java.awt.Dialog;
+import java.awt.Window;
+import java.awt.Frame;
+
+public class testJavaArguments {
+
+  public static void testMessageDigest() throws NoSuchAlgorithmException {
+    // Test literal string argument matching - should match MD5 signature
+    MessageDigest md5 = MessageDigest.getInstance("MD5");
+
+    // Test different case variations
+    MessageDigest md5Upper = MessageDigest.getInstance("md5");
+
+    // Test SHA-256 hash algorithm
+    MessageDigest sha256 = MessageDigest.getInstance("SHA-256");
+
+    // Test SHA-1 (should match sha1 signature)
+    MessageDigest sha1 = MessageDigest.getInstance("SHA-1");
+  }
+
+  public static void testCanvasSetSize() {
+    Canvas canvas1 = new Canvas();
+    // Test specific numeric literal arguments
+    canvas1.setSize(32, 99);
+
+    Canvas canvas2 = new Canvas();
+    // Test different values (should not match 32, 99 signature)
+    canvas2.setSize(64, 128);
+
+    Canvas canvas3 = new Canvas();
+    // Test first arg matches, second doesn't
+    canvas3.setSize(32, 100);
+  }
+
+  public static void testDialogWithWindow() {
+    // Test type resolution - Dialog constructor with Window argument
+    Window window = new Window(new Frame());
+    Dialog dialog = new Dialog(window);
+
+    // Test nested type resolution
+    Dialog nestedDialog = new Dialog(new Window(new Frame()));
+  }
+
+  public static void testMixedArguments() {
+    Canvas canvas = new Canvas();
+    // Variable arguments (should not match specific literal signatures)
+    int width = 32;
+    int height = 99;
+    canvas.setSize(width, height);
+  }
+
+  public static void main(String[] args) {
+    try {
+      testMessageDigest();
+      testCanvasSetSize();
+      testDialogWithWindow();
+      testMixedArguments();
+    } catch (Exception e) {
+      e.printStackTrace();
+    }
+  }
+}

plugin/callgraph/imports.go

@@ -97,6 +97,7 @@ func resolveNamespaceWithSeparator(moduleName string, lang core.Language) string
 	if exists {
 		return strings.Join(strings.Split(moduleName, separator), namespaceSeparator)
 	}
+
 	return moduleName
 }
 
@@ -111,5 +112,6 @@ func resolveSubmoduleIdentifier(identifier string, lang core.Language) string {
 		parts := strings.Split(identifier, separator)
 		return parts[len(parts)-1]
 	}
+
 	return identifier
 }