// Copyright (C) 2023  Luke Shumaker <lukeshu@lukeshu.com>
//
// SPDX-License-Identifier: GPL-2.0-or-later

package jsonparse

import (
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestParserHandleRune(t *testing.T) {
	t.Parallel()
	type testcase struct {
		Input    string
		ExpStack []string
	}
	testcases := map[string]testcase{
		// Keep these test-cases in-sync with the examples in parse.go.
		"object": {
			Input: `{"x":"y","a":"b"}`,
			ExpStack: []string{
				// st,// processed
				`?`,
				`{`,  // {
				`:"`, // {"
				`:"`, // {"x
				`:`,  // {"x"
				`o?`, // {"x":
				`o"`, // {"x":"
				`o"`, // {"x":"y
				`o`,  // {"x":"y"
				`}`,  // {"x":"y",
				`:"`, // {"x":"y","
				`:"`, // {"x":"y","a
				`:`,  // {"x":"y","a"
				`o?`, // {"x":"y","a":
				`o"`, // {"x":"y","a":"
				`o"`, // {"x":"y","a":"b
				`o`,  // {"x":"y","a":"b"
				``,   // {"x":"y","a":"b"}
			},
		},
		"array": {
			Input: `["x","y"]`,
			ExpStack: []string{
				// st,// processed
				`?`,
				`[`,  // [
				`a"`, // ["
				`a"`, // ["x
				`a`,  // ["x"
				`a?`, // ["x",
				`a"`, // ["x","
				`a"`, // ["x","y
				`a`,  // ["x","y"
				``,   // ["x","y"]
			},
		},
	}
	for tcName, tc := range testcases {
		tc := tc
		t.Run(tcName, func(t *testing.T) {
			t.Parallel()
			var par Parser
			if !assert.Equal(t, len(tc.Input)+1, len(tc.ExpStack)) {
				return
			}
			for i, r := range tc.Input {
				assert.Equal(t, tc.ExpStack[i], par.stackString())
				_, err := par.HandleRune(r, true)
				assert.NoError(t, err)
				assert.Equal(t, tc.ExpStack[i+1], par.stackString())
			}
		})
	}
}