add del command

add tests for all commands

wrap entry point with fang

add --version flag
target to Taskfile

cmd/add_test.go

@@ -0,0 +1,50 @@
+package cmd
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestRunAddCommand(t *testing.T) {
+	tests := []struct {
+		name           string
+		existing       string
+		args           []string
+		expectedOutput string
+	}{
+		{
+			name:           "Add new patterns",
+			existing:       "",
+			args:           []string{"*.log", "temp/"},
+			expectedOutput: "Added pattern '*.log' to the exclude file.\nAdded pattern 'temp/' to the exclude file.\n",
+		},
+		{
+			name:           "Add duplicate patterns",
+			existing:       "*.log\ntemp/\n",
+			args:           []string{"*.log", "temp/"},
+			expectedOutput: "Pattern '*.log' already exists in the exclude file. Skipping.\nPattern 'temp/' already exists in the exclude file. Skipping.\n",
+		},
+		{
+			name:           "Add mix of new and duplicate patterns",
+			existing:       "*.log\n",
+			args:           []string{"*.log", "temp/"},
+			expectedOutput: "Pattern '*.log' already exists in the exclude file. Skipping.\nAdded pattern 'temp/' to the exclude file.\n",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var buf bytes.Buffer
+			f := bytes.NewBufferString(tt.existing)
+
+			err := runAddCommand(&buf, f, tt.args)
+			if err != nil {
+				t.Fatalf("runAddCommand returned an error: %v", err)
+			}
+
+			if buf.String() != tt.expectedOutput {
+				t.Errorf("Expected output:\n%s\nGot:\n%s", tt.expectedOutput, buf.String())
+			}
+		})
+	}
+}