refactor: remove utils pkg

BREAKING CHANGE: utils package has been removed in favor of specific new
packages (http, crypto, strings)

pkg/http/marshal_test.go

@@ -0,0 +1,60 @@
+package http
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestConcatenateJSON(t *testing.T) {
+	type args struct {
+		first  []byte
+		second []byte
+	}
+	tests := []struct {
+		name    string
+		args    args
+		want    []byte
+		wantErr bool
+	}{
+		{
+			"invalid first part, error",
+			args{
+				[]byte(`invalid`),
+				[]byte(`{"some": "thing"}`),
+			},
+			nil,
+			true,
+		},
+		{
+			"invalid second part, error",
+			args{
+				[]byte(`{"some": "thing"}`),
+				[]byte(`invalid`),
+			},
+			nil,
+			true,
+		},
+		{
+			"both valid, merged",
+			args{
+				[]byte(`{"some": "thing"}`),
+				[]byte(`{"another": "thing"}`),
+			},
+
+			[]byte(`{"some": "thing","another": "thing"}`),
+			false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got, err := ConcatenateJSON(tt.args.first, tt.args.second)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("ConcatenateJSON() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if !bytes.Equal(got, tt.want) {
+				t.Errorf("ConcatenateJSON() got = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}