First commit

part3-taskcli/store_test.go

@@ -0,0 +1,49 @@
+package main
+
+import "testing"
+
+func TestCompletePersists(t *testing.T) {
+	store := NewStore()
+	task := store.Add("write report")
+	if err := store.Complete(task.ID); err != nil {
+		t.Fatalf("Complete(%d) returned error: %v", task.ID, err)
+	}
+	got, ok := store.Get(task.ID)
+	if !ok {
+		t.Fatalf("task %d disappeared from the store", task.ID)
+	}
+	if !got.Done {
+		t.Fatalf("task %d should be done after Complete, but Done is false", task.ID)
+	}
+}
+
+func TestCompleteUnknownIDReturnsError(t *testing.T) {
+	store := NewStore()
+	store.Add("write report")
+	if err := store.Complete(99); err == nil {
+		t.Fatal("Complete(99) should return an error for a missing id")
+	}
+}
+
+func TestTitleWidthCountsCharacters(t *testing.T) {
+	task := Task{Title: "café menu"}
+	if w := task.TitleWidth(); w != 9 {
+		t.Fatalf("TitleWidth(%q) = %d, want 9 (characters, not bytes)", task.Title, w)
+	}
+}
+
+func TestParseIDRejectsGarbage(t *testing.T) {
+	if _, err := ParseID("abc"); err == nil {
+		t.Fatal(`ParseID("abc") should return an error, got nil`)
+	}
+}
+
+func TestParseIDAcceptsNumbers(t *testing.T) {
+	id, err := ParseID("42")
+	if err != nil {
+		t.Fatalf(`ParseID("42") returned error: %v`, err)
+	}
+	if id != 42 {
+		t.Fatalf(`ParseID("42") = %d, want 42`, id)
+	}
+}