feat: implement remove command with sequential removals

tests/unit/remove_parser_test.go

@@ -0,0 +1,46 @@
+package replace_test
+
+import (
+	"testing"
+
+	"github.com/rogeecn/renamer/internal/remove"
+)
+
+func TestParseArgsDeduplicatesPreservingOrder(t *testing.T) {
+	args := []string{" draft", " draft", " copy", " draft"}
+
+	result, err := remove.ParseArgs(args)
+	if err != nil {
+		t.Fatalf("ParseArgs returned error: %v", err)
+	}
+
+	expected := []string{" draft", " copy"}
+	if len(result.Tokens) != len(expected) {
+		t.Fatalf("expected %d tokens, got %d", len(expected), len(result.Tokens))
+	}
+	for i, token := range expected {
+		if result.Tokens[i] != token {
+			t.Fatalf("token[%d] mismatch: expected %q, got %q", i, token, result.Tokens[i])
+		}
+	}
+
+	if len(result.Duplicates) != 2 {
+		t.Fatalf("expected 2 duplicates recorded, got %d", len(result.Duplicates))
+	}
+	if result.Duplicates[0] != " draft" || result.Duplicates[1] != " draft" {
+		t.Fatalf("unexpected duplicates: %#v", result.Duplicates)
+	}
+}
+
+func TestParseArgsSkipsWhitespaceOnlyTokens(t *testing.T) {
+	args := []string{"  ", "\t", "foo"}
+
+	result, err := remove.ParseArgs(args)
+	if err != nil {
+		t.Fatalf("ParseArgs returned error: %v", err)
+	}
+
+	if len(result.Tokens) != 1 || result.Tokens[0] != "foo" {
+		t.Fatalf("expected single token 'foo', got %#v", result.Tokens)
+	}
+}