package parse

import (
	"strings"
	"testing"
)

func TestComment(t *testing.T) {
	for _, test := range []parseTest{
		{``, `{}`, ``},
		{`#`, `{}`, ``},
		{`# `, `{}`, ``},
		{`# aaaaaa`, `{}`, ``},
		{"# ending in EOL & EOF\r\n", `{}`, ``},
		{`# \xxx/ \u can't escape/`, `{}`, ``},
		{"# \tlexe\r accepts embedded ca\r\riage \returns\r\n", `{}`, ``},
		{"   # multiple\n#lines\n \t\n\n\t#with\n ### comments!", `{}`, ``},
		{"# with data and newline\ncode continues here", `{}`, `unexpected input (expected a value assignment) at line 2, column 6`},
	} {
		p := newParser()
		testParse(t, p, p.startDocument, test)
	}
}

func TestInvalidDocument(t *testing.T) {
	for _, test := range []parseTest{
		{`!false!`, `{}`, `unexpected input (expected key/value pair, table or array of tables) at start of file`},
	} {
		p := newParser()
		testParse(t, p, p.startDocument, test)
	}
}

func TestBufferRelatedBug(t *testing.T) {
	text := strings.Repeat("#", 2040) + "\n# a bug\n"
	ast, err := Run(text)

	if len(text) != 2049 {
		t.Fatalf("Test input is not 2049 bytes, but %d", len(text))
	}
	if err != nil {
		t.Fatalf("Unexpected error from parser: %s", err)
	}
	if ast.String() != "{}" {
		t.Fatalf("Unexpected TOML document structure returned:\nexpected: {}\nactual: %s", ast)
	}
}