added hover doc to variable

test/lsp_hover_variable_test.go

@@ -0,0 +1,67 @@
+package integration
+
+import (
+	"strings"
+	"testing"
+
+	"github.com/marte-community/marte-dev-tools/internal/index"
+	"github.com/marte-community/marte-dev-tools/internal/lsp"
+	"github.com/marte-community/marte-dev-tools/internal/parser"
+)
+
+func TestLSPHoverVariable(t *testing.T) {
+	lsp.Tree = index.NewProjectTree()
+	lsp.Documents = make(map[string]string)
+
+	content := `
+#var MyInt: int = 123
++Obj = {
+    Field = $MyInt
+}
+`
+	uri := "file://hover_var.marte"
+	lsp.Documents[uri] = content
+	p := parser.NewParser(content)
+	cfg, err := p.Parse()
+	if err != nil {
+		t.Fatal(err)
+	}
+	lsp.Tree.AddFile("hover_var.marte", cfg)
+	lsp.Tree.ResolveReferences()
+
+	// 1. Hover on Definition (#var MyInt)
+	// Line 2 (index 1). # is at 0. Name "MyInt" is at 5.
+	paramsDef := lsp.HoverParams{
+		TextDocument: lsp.TextDocumentIdentifier{URI: uri},
+		Position:     lsp.Position{Line: 1, Character: 5},
+	}
+	resDef := lsp.HandleHover(paramsDef)
+	if resDef == nil {
+		t.Fatal("Expected hover for definition")
+	}
+	contentDef := resDef.Contents.(lsp.MarkupContent).Value
+	if !strings.Contains(contentDef, "Type: `int`") {
+		t.Errorf("Hover def missing type. Got: %s", contentDef)
+	}
+	if !strings.Contains(contentDef, "Default: `123`") {
+		t.Errorf("Hover def missing default value. Got: %s", contentDef)
+	}
+
+	// 2. Hover on Reference ($MyInt)
+	// Line 4 (index 3). $MyInt is at col 12.
+	paramsRef := lsp.HoverParams{
+		TextDocument: lsp.TextDocumentIdentifier{URI: uri},
+		Position:     lsp.Position{Line: 3, Character: 12},
+	}
+	resRef := lsp.HandleHover(paramsRef)
+	if resRef == nil {
+		t.Fatal("Expected hover for reference")
+	}
+	contentRef := resRef.Contents.(lsp.MarkupContent).Value
+	if !strings.Contains(contentRef, "Type: `int`") {
+		t.Errorf("Hover ref missing type. Got: %s", contentRef)
+	}
+	if !strings.Contains(contentRef, "Default: `123`") {
+		t.Errorf("Hover ref missing default value. Got: %s", contentRef)
+	}
+}