add a test for FeedSource

feed_test.go

@@ -0,0 +1,48 @@
+package main
+
+import (
+	"context"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+var feedSourceTests = []struct {
+	filename string
+	title    string
+	itemText string
+}{
+	{
+		filename: "/xkcd.xml",
+		title:    "xkcd.com",
+		itemText: "Occam",
+	},
+}
+
+func TestFeedSource(t *testing.T) {
+	server := httptest.NewServer(http.FileServer(http.Dir("testdata")))
+	defer server.Close()
+
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	for _, tt := range feedSourceTests {
+		src := NewFeed(server.URL + tt.filename)
+		src.update(ctx)
+		if err := src.Error; err != nil {
+			t.Errorf("%v: Error = %v, expected nil", tt.filename, err)
+			continue
+		}
+		if src.Title != tt.title {
+			t.Errorf("%v: Title = %v expected %v", tt.filename, src.Title, tt.title)
+		}
+		items := src.GetItems()
+		if len(items) == 0 {
+			t.Errorf("%v: GetItems() = %v expected len > 0", tt.filename, items)
+		} else {
+			x := items[0]
+			if x.Text != tt.itemText {
+				t.Errorf("%v: item 0 Text = %q expected %q", tt.filename, x.Text, tt.itemText)
+			}
+		}
+	}
+}

testdata/xkcd.xml

@@ -0,0 +1,2 @@
+<?xml version="1.0" encoding="utf-8"?>
+<feed xmlns="http://www.w3.org/2005/Atom" xml:lang="en"><title>xkcd.com</title><link href="https://xkcd.com/" rel="alternate"></link><id>https://xkcd.com/</id><updated>2021-11-12T00:00:00Z</updated><entry><title>Occam</title><link href="https://xkcd.com/2541/" rel="alternate"></link><updated>2021-11-12T00:00:00Z</updated><id>https://xkcd.com/2541/</id><summary type="html">&lt;img src="https://imgs.xkcd.com/comics/occam.png" title="Oh no, Murphy just picked up the razor." alt="Oh no, Murphy just picked up the razor." /&gt;</summary></entry><entry><title>TTSLTSWBD</title><link href="https://xkcd.com/2540/" rel="alternate"></link><updated>2021-11-10T00:00:00Z</updated><id>https://xkcd.com/2540/</id><summary type="html">&lt;img src="https://imgs.xkcd.com/comics/ttsltswbd.png" title="Tomorrow's sessions will be entirely devoted to sewing machine rotary hooks." alt="Tomorrow's sessions will be entirely devoted to sewing machine rotary hooks." /&gt;</summary></entry><entry><title>Flinch</title><link href="https://xkcd.com/2539/" rel="alternate"></link><updated>2021-11-08T00:00:00Z</updated><id>https://xkcd.com/2539/</id><summary type="html">&lt;img src="https://imgs.xkcd.com/comics/flinch.png" title="Premed: &amp;quot;Does this count for a physics credit? Can we shorten the string so I can get it done faster? And can we do one where it hits me in the face? I gotta do a thing for first aid training right after.&amp;quot;" alt="Premed: &amp;quot;Does this count for a physics credit? Can we shorten the string so I can get it done faster? And can we do one where it hits me in the face? I gotta do a thing for first aid training right after.&amp;quot;" /&gt;</summary></entry><entry><title>Snack</title><link href="https://xkcd.com/2538/" rel="alternate"></link><updated>2021-11-05T00:00:00Z</updated><id>https://xkcd.com/2538/</id><summary type="html">&lt;img src="https://imgs.xkcd.com/comics/snack.png" title="Although grad students, suddenly reminded that food exists, tend to just grab and devour both without further discussion." alt="Although grad students, suddenly reminded that food exists, tend to just grab and devour both without further discussion." /&gt;</summary></entry></feed>