// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package doc

import (
	"bytes"
	"reflect"
	"testing"
)

var headingTests = []struct {
	line string
	ok   bool
}{
	{"Section", true},
	{"A typical usage", true},
	{"ΔΛΞ is Greek", true},
	{"Foo 42", true},
	{"", false},
	{"section", false},
	{"A typical usage:", false},
	{"This code:", false},
	{"δ is Greek", false},
	{"Foo §", false},
	{"Fermat's Last Sentence", true},
	{"Fermat's", true},
	{"'sX", false},
	{"Ted 'Too' Bar", false},
	{"Use n+m", false},
	{"Scanning:", false},
	{"N:M", false},
}

func TestIsHeading(t *testing.T) {
	for _, tt := range headingTests {
		if h := heading(tt.line); (len(h) > 0) != tt.ok {
			t.Errorf("isHeading(%q) = %v, want %v", tt.line, h, tt.ok)
		}
	}
}

var blocksTests = []struct {
	in  string
	out []block
}{
	{
		in: `Para 1.
Para 1 line 2.

Para 2.

Section

Para 3.

	pre
	pre1

Para 4.
	pre
	pre2
`,
		out: []block{
			{opPara, []string{"Para 1.\n", "Para 1 line 2.\n"}},
			{opPara, []string{"Para 2.\n"}},
			{opHead, []string{"Section"}},
			{opPara, []string{"Para 3.\n"}},
			{opPre, []string{"pre\n", "pre1\n"}},
			{opPara, []string{"Para 4.\n"}},
			{opPre, []string{"pre\n", "pre2\n"}},
		},
	},
}

func TestBlocks(t *testing.T) {
	for i, tt := range blocksTests {
		b := blocks(tt.in)
		if !reflect.DeepEqual(b, tt.out) {
			t.Errorf("#%d: mismatch\nhave: %v\nwant: %v", i, b, tt.out)
		}
	}
}

var emphasizeTests = []struct {
	in  string
	out string
}{
	{"http://www.google.com/", `<a href="http://www.google.com/">http://www.google.com/</a>`},
	{"https://www.google.com/", `<a href="https://www.google.com/">https://www.google.com/</a>`},
	{"http://www.google.com/path.", `<a href="http://www.google.com/path">http://www.google.com/path</a>.`},
	{"(http://www.google.com/)", `(<a href="http://www.google.com/">http://www.google.com/</a>)`},
	{"Foo bar http://example.com/ quux!", `Foo bar <a href="http://example.com/">http://example.com/</a> quux!`},
	{"Hello http://example.com/%2f/ /world.", `Hello <a href="http://example.com/%2f/">http://example.com/%2f/</a> /world.`},
	{"Lorem http: ipsum //host/path", "Lorem http: ipsum //host/path"},
	{"javascript://is/not/linked", "javascript://is/not/linked"},
}

func TestEmphasize(t *testing.T) {
	for i, tt := range emphasizeTests {
		var buf bytes.Buffer
		emphasize(&buf, tt.in, nil, true)
		out := buf.String()
		if out != tt.out {
			t.Errorf("#%d: mismatch\nhave: %v\nwant: %v", i, out, tt.out)
		}
	}
}