Add unit tests for build history.

_tests/build_history.txt

@@ -0,0 +1,4 @@
+
+
+
+      <table page-has-up="false" page-has-down="false" page-entry-newest="-9223372036854775805" page-entry-oldest="-9223372036854775807" class="pane hasPageData"><tr page-entry-id="-9223372036854775805" class="build-row  single-line"><td class="build-row-cell"><div class="pane build-name"><div class="build-icon"><a href="/jenkins/job/j1/3/console" class="build-status-link"><img src="/jenkins/images/16x16/blue.png" alt="Success &gt; Console Output" tooltip="Success &gt; Console Output" style="width: 16px; height: 16px; " class="icon-blue icon-sm" /></a></div><a update-parent-class=".build-row" href="/jenkins/job/j1/3/" class="tip model-link inside build-link display-name">#3</a></div><div time="1484327939346" class="pane build-details"><a update-parent-class=".build-row" href="/jenkins/job/j1/3/" class="tip model-link inside build-link">Jan 13, 2017 9:18 AM</a></div><div class="pane build-controls"><div class="middle-align build-badge"></div></div><div class="left-bar"></div></td></tr><tr page-entry-id="-9223372036854775806" class="build-row  single-line"><td class="build-row-cell"><div class="pane build-name"><div class="build-icon"><a href="/jenkins/job/j1/2/console" class="build-status-link"><img src="/jenkins/images/16x16/blue.png" alt="Success &gt; Console Output" tooltip="Success &gt; Console Output" style="width: 16px; height: 16px; " class="icon-blue icon-sm" /></a></div><a update-parent-class=".build-row" href="/jenkins/job/j1/2/" class="tip model-link inside build-link display-name">#2</a></div><div time="1484327935341" class="pane build-details"><a update-parent-class=".build-row" href="/jenkins/job/j1/2/" class="tip model-link inside build-link">Jan 13, 2017 9:18 AM</a></div><div class="pane build-controls"><div class="middle-align build-badge"></div></div><div class="left-bar"></div></td></tr><tr page-entry-id="-9223372036854775807" class="build-row  single-line"><td class="build-row-cell"><div class="pane build-name"><div class="build-icon"><a href="/jenkins/job/j1/1/console" class="build-status-link"><img src="/jenkins/images/16x16/blue.png" alt="Success &gt; Console Output" tooltip="Success &gt; Console Output" style="width: 16px; height: 16px; " class="icon-blue icon-sm" /></a></div><a update-parent-class=".build-row" href="/jenkins/job/j1/1/" class="tip model-link inside build-link display-name">#1</a></div><div time="1484327924442" class="pane build-details"><a update-parent-class=".build-row" href="/jenkins/job/j1/1/" class="tip model-link inside build-link">Jan 13, 2017 9:18 AM</a></div><div class="pane build-controls"><div class="middle-align build-badge"></div></div><div class="left-bar"></div></td></tr></table>

jenkins_test.go

@@ -3,6 +3,7 @@ package gojenkins
 import (
 	"io/ioutil"
 	"math/rand"
+	"os"
 	"testing"
 	"time"
 
@@ -71,6 +72,15 @@ func TestCreateBuilds(t *testing.T) {
 	}
 }
 
+func TestParseBuildHistory(t *testing.T) {
+	r, err := os.Open("_tests/build_history.txt")
+	if err != nil {
+		panic(err)
+	}
+	history := parseBuildHistory(r)
+	assert.True(t, len(history) == 3)
+}
+
 func TestCreateViews(t *testing.T) {
 	list_view, err := jenkins.CreateView("test_list_view", LIST_VIEW)
 	assert.Nil(t, err)

job.go

@@ -22,7 +22,6 @@ import (
 	"net/url"
 	"path"
 	"strconv"
-	"strings"
 )
 
 type Job struct {
@@ -468,11 +467,7 @@ func (j *Job) Poll() (int, error) {
 }
 
 func (j *Job) History() ([]*history, error) {
-	endpoint := j.Raw.URL[strings.Index(j.Raw.URL, "/job"):]
-	endpoint = strings.TrimSuffix(endpoint, "/")
-	endpoint += "/buildHistory/ajax"
-
-	resp, err := j.Jenkins.Requester.Get(endpoint, nil, nil)
+	resp, err := j.Jenkins.Requester.Get(j.Base+"/buildHistory/ajax", nil, nil)
 	if err != nil {
 		return nil, err
 	}