add del command

add tests for all commands

wrap entry point with fang

add --version flag
target to Taskfile

cmd/del_test.go

@@ -0,0 +1,49 @@
+package cmd
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestRunDelCommand(t *testing.T) {
+	tests := []struct {
+		name            string
+		initialContent  string
+		patternToDelete string
+		expectedOutput  string
+		expectedContent string
+	}{
+		{
+			name:            "Delete existing pattern",
+			initialContent:  defaultExcludeFileContent + "node_modules\n.DS_Store\n",
+			patternToDelete: "node_modules",
+			expectedOutput:  defaultExcludeFileContent + ".DS_Store\n" + "Deleted pattern 'node_modules' from the exclude file.\n",
+		},
+		{
+			name:            "Delete non-existing pattern",
+			initialContent:  defaultExcludeFileContent + "node_modules\n.DS_Store\n",
+			patternToDelete: "dist",
+			expectedOutput:  "Pattern 'dist' not found in the exclude file. Nothing to delete.\n",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var buf bytes.Buffer
+			buf.WriteString(tt.initialContent)
+
+			err := runDelCommand(&buf, &buf, tt.patternToDelete)
+			if err != nil {
+				t.Fatalf("runDelCommand returned an error: %v", err)
+			}
+
+			if buf.String() != tt.expectedOutput {
+				t.Errorf(
+					"Expected output and content:\n%s\nGot:\n%s",
+					tt.expectedOutput,
+					buf.String(),
+				)
+			}
+		})
+	}
+}