refactor how repl works

internal/evaluator/evaluator.go

@@ -518,7 +518,7 @@ func EvalModule(name string) object.Object {
 	}
 
 	l := lexer.New(string(b))
-	p := parser.New(l)
+	p := parser.New(fmt.Sprintf("<module %s>", name), l)
 
 	module := p.ParseProgram()
 	if len(p.Errors()) != 0 {

internal/evaluator/evaluator_test.go

@@ -796,7 +796,7 @@ func TestWhileExpressions(t *testing.T) {
 
 func testEval(input string) object.Object {
 	l := lexer.New(input)
-	p := parser.New(l)
+	p := parser.New("<test>", l)
 	program := p.ParseProgram()
 	env := object.NewEnvironment()
 
@@ -862,9 +862,9 @@ func TestImportExpressions(t *testing.T) {
 		input    string
 		expected interface{}
 	}{
-		{`mod := import("../../testdata/mod"); mod.A`, 5},
-		{`mod := import("../../testdata/mod"); mod.Sum(2, 3)`, 5},
-		{`mod := import("../../testdata/mod"); mod.a`, nil},
+		{`mod := import("../testdata/mod"); mod.A`, 5},
+		{`mod := import("../testdata/mod"); mod.Sum(2, 3)`, 5},
+		{`mod := import("../testdata/mod"); mod.a`, nil},
 	}
 
 	for _, tt := range tests {