feat: implement remove command with sequential removals

tests/unit/remove_engine_test.go

@@ -0,0 +1,74 @@
+package replace_test
+
+import (
+	"testing"
+
+	"github.com/rogeecn/renamer/internal/remove"
+)
+
+func TestApplyTokensSequentialRemoval(t *testing.T) {
+	candidate := remove.Candidate{
+		BaseName:     "report copy draft.txt",
+		RelativePath: "report copy draft.txt",
+	}
+
+	result := remove.ApplyTokens(candidate, []string{" copy", " draft"})
+
+	if !result.Changed {
+		t.Fatalf("expected result to be marked as changed")
+	}
+
+	if result.ProposedName != "report.txt" {
+		t.Fatalf("expected proposed name to be report.txt, got %q", result.ProposedName)
+	}
+
+	if result.Matches[" copy"] != 1 {
+		t.Fatalf("expected match count for ' copy' to be 1, got %d", result.Matches[" copy"])
+	}
+
+	if result.Matches[" draft"] != 1 {
+		t.Fatalf("expected match count for ' draft' to be 1, got %d", result.Matches[" draft"])
+	}
+}
+
+func TestApplyTokensNoChange(t *testing.T) {
+	candidate := remove.Candidate{
+		BaseName:     "notes.txt",
+		RelativePath: "notes.txt",
+	}
+
+	result := remove.ApplyTokens(candidate, []string{" copy"})
+
+	if result.Changed {
+		t.Fatalf("expected no change for candidate without matches")
+	}
+
+	if len(result.Matches) != 0 {
+		t.Fatalf("expected no matches to be recorded, got %#v", result.Matches)
+	}
+
+	if result.ProposedName != candidate.BaseName {
+		t.Fatalf("expected proposed name to remain %q, got %q", candidate.BaseName, result.ProposedName)
+	}
+}
+
+func TestApplyTokensEmptyName(t *testing.T) {
+	candidate := remove.Candidate{
+		BaseName:     "draft",
+		RelativePath: "draft",
+	}
+
+	result := remove.ApplyTokens(candidate, []string{"draft"})
+
+	if !result.Changed {
+		t.Fatalf("expected change when removing the full name")
+	}
+
+	if result.ProposedName != "" {
+		t.Fatalf("expected proposed name to be empty, got %q", result.ProposedName)
+	}
+
+	if result.Matches["draft"] != 1 {
+		t.Fatalf("expected matches to record removal, got %#v", result.Matches)
+	}
+}