1 files changed, 106 insertions, 0 deletions
diff --git a/sent_test.go b/sent_test.go
new file mode 100644
index 0000000..64b13d6
--- /dev/null
+++ b/sent_test.go
@@ -0,0 +1,106 @@
+package main
+
+import (
+	"os"
+	"path/filepath"
+	"reflect"
+	"testing"
+)
+
+func TestReadSentNew(t *testing.T) {
+	tmp := t.TempDir()
+	filename := filepath.Join(tmp, "does-not-exist.json")
+	got, err := readSent(filename)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if len(got) > 0 {
+		t.Errorf("Expect empty slice, but got: %v", got)
+	}
+}
+
+func TestReadSent(t *testing.T) {
+	tmp := t.TempDir()
+	filename := filepath.Join(tmp, "sent.json")
+	data := []byte(`[{"ID":156522206,"Price":"£2,500"}]`)
+	os.WriteFile(filename, data, 0644)
+
+	got, err := readSent(filename)
+	if err != nil {
+		t.Fatal(err)
+	}
+	want := []flat{
+		flat{ID: 156522206, Price: "£2,500"},
+	}
+	if !reflect.DeepEqual(got, want) {
+		t.Errorf("readSent failed: got: %v, want: %v", got, want)
+	}
+}
+
+func TestRemoveAlreadySent(t *testing.T) {
+	flats := []flat{
+		flat{
+			ID:    156522206,
+			Price: "£2,500",
+		},
+		flat{
+			ID:    158462822,
+			Price: "£3,000",
+		}}
+	sent := []flat{
+		flat{
+			ID:    156522206,
+			Price: "£2,500",
+		},
+	}
+
+	got := removeAlreadySent(flats, sent)
+	want := []flat{flat{ID: 158462822, Price: "£3,000"}}
+	if !reflect.DeepEqual(got, want) {
+		t.Errorf("removeAlreadySent failed: got: %v, want: %v",
+			got, want)
+	}
+
+}
+
+func TestWriteSentNew(t *testing.T) {
+	tmp := t.TempDir()
+	filename := filepath.Join(tmp, "sent.json")
+	flats := []flat{flat{ID: 156522206, Price: "£2,500"}}
+
+	err := writeSent(flats, filename)
+	if err != nil {
+		t.Fatal(err)
+	}
+	got, err := os.ReadFile(filename)
+	if err != nil {
+		t.Fatal(err)
+	}
+	want := []byte(`[{"ID":156522206,"Price":"£2,500"}]`)
+	if !reflect.DeepEqual(got, want) {
+		t.Errorf("writeSent failed: got: %v, want: %v", got, want)
+	}
+}
+
+func TestWriteSentOverride(t *testing.T) {
+	tmp := t.TempDir()
+	filename := filepath.Join(tmp, "sent.json")
+	_, err := os.Create(filename)
+	if err != nil {
+		t.Fatal(err)
+	}
+	flats := []flat{flat{ID: 156522206, Price: "£2,500"}}
+	err = writeSent(flats, filename)
+
+	if err != nil {
+		t.Fatal(err)
+	}
+	got, err := os.ReadFile(filename)
+	if err != nil {
+		t.Fatal(err)
+	}
+	want := []byte(`[{"ID":156522206,"Price":"£2,500"}]`)
+	if !reflect.DeepEqual(got, want) {
+		t.Errorf("writeSent failed: got: %v, want: %v", got, want)
+	}
+}