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scan_test.go
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scan_test.go
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package main
import (
"fmt"
"net/http"
"net/http/httptest"
"net/url"
"sort"
"testing"
"time"
)
func TestCrawling(t *testing.T) {
localServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path == "/" {
pageContent := `
<html>
<a href="/page2">Page 2</a>
<html>`
fmt.Fprintln(w, pageContent)
} else if r.URL.Path == "/page2" {
pageContent := `
<html>
<a href="/page3">Page 3</a>
<a href="/404">Borked</a>
<a href="http://nowhere.com">Borked</a>
<html>`
fmt.Fprintln(w, pageContent)
} else if r.URL.Path == "/page3" {
pageContent := "<html></html>"
fmt.Fprintln(w, pageContent)
} else if r.URL.Path == "/404" {
http.NotFound(w, r)
}
}))
startPage, _ := url.Parse(localServer.URL + "/")
completed, _ := Scan(*startPage, []JSONUnstartedURL{JSONUnstartedURL{startPage.String(), ""}}, []url.URL{}, 1, time.Second)
sort.Sort(ByURL(completed))
if len(completed) != 5 {
t.Error("Expected 5 links, got", len(completed))
}
var urls []string
var statuses []int
var messages []string
for _, u := range completed {
urls = append(urls, u.URL.String())
statuses = append(statuses, u.StatusCode)
messages = append(messages, u.Message)
}
expectedUrls := []string{
localServer.URL + "/",
localServer.URL + "/404",
localServer.URL + "/page2",
localServer.URL + "/page3",
"http://nowhere.com",
}
for i, v := range urls {
if v != expectedUrls[i] {
t.Error("Unexpected URL: ", v)
}
}
expectedStatuses := []int{200, 404, 200, 200, 0}
for i, v := range statuses {
if v != expectedStatuses[i] {
t.Error("Unexpected Status: ", v)
}
}
expectedMessages := []string{"", "", "", "", "Head http://nowhere.com: dial tcp: lookup nowhere.com: no such host"}
for i, v := range messages {
if v != expectedMessages[i] {
t.Error("Unexpected Message: ", v)
}
}
}
func TestCrawlingTimeout(t *testing.T) {
localServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path == "/" {
pageContent := `
<html>
<a href="/page2">Page 2</a>
<html>`
fmt.Fprintln(w, pageContent)
} else if r.URL.Path == "/page2" {
time.Sleep(5 * time.Millisecond)
pageContent := `
<html>
<a href="/page3">Page 3</a>
<a href="/404">Borked</a>
<a href="http://nowhere.com">Borked</a>
<html>`
fmt.Fprintln(w, pageContent)
}
}))
startPage, _ := url.Parse(localServer.URL + "/")
completed, incomplete := Scan(*startPage, []JSONUnstartedURL{JSONUnstartedURL{startPage.String(), ""}}, []url.URL{}, 1, 3*time.Millisecond)
if len(completed) != 1 {
t.Error("Expected 1 completed link, got", len(completed))
}
if len(incomplete) != 1 {
t.Error("Expected 1 incomplete link, got", len(incomplete))
}
}
func TestCrawlingCyclic(t *testing.T) {
localServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if r.URL.Path == "/" {
pageContent := `
<html>
<a href="/page2">Page 2</a>
<html>`
fmt.Fprintln(w, pageContent)
} else if r.URL.Path == "/page2" {
pageContent := `
<html>
<a href="/">Home again</a>
<html>`
fmt.Fprintln(w, pageContent)
}
}))
startPage, _ := url.Parse(localServer.URL + "/")
completed, _ := Scan(*startPage, []JSONUnstartedURL{JSONUnstartedURL{startPage.String(), ""}}, []url.URL{}, 1, time.Second)
sort.Sort(ByURL(completed))
if len(completed) != 2 {
t.Error("Expected 2 links, got", len(completed))
}
}