test(list): add TestIndex for indexing filtered results

list/list_test.go

@@ -11,7 +11,7 @@ import (
 
 type item string
 
-func (i item) FilterValue() string { return "" }
+func (i item) FilterValue() string { return string(i) }
 
 type itemDelegate struct{}
 
@@ -72,3 +72,71 @@ func TestCustomStatusBarItemName(t *testing.T) {
 		t.Fatalf("Error: expected view to contain %s", expected)
 	}
 }
+
+func TestIndex(t *testing.T) {
+	list := New([]Item{item("bar"), item("baz"), item("foo"), item("bar"), item("panda"), item("bay")}, itemDelegate{}, 10, 15)
+	list.cursor = 0
+
+	// Hardcode filtering
+	list.filterState = Filtering
+	list.FilterInput.SetValue("f")
+	msg := filterItems(list)
+	val, ok := msg().(FilterMatchesMsg)
+	if ok {
+		list.filteredItems = filteredItems(val)
+	}
+
+	// index updates once the cursor changes
+	t.Log("cursor", list.Cursor())
+	t.Log("i:", list.Index())
+	t.Log("gi:", list.GlobalIndex())
+
+	t.Log("\n", list.View())
+
+	// take 2
+	list.ResetFilter()
+
+	t.Log("\n", list.View())
+	list.filterState = Filtering
+	list.FilterInput.SetValue("ba")
+	msg = filterItems(list)
+	val, ok = msg().(FilterMatchesMsg)
+	if ok {
+		list.filteredItems = filteredItems(val)
+	}
+	// cursor at 0
+	t.Log("cursor", list.Cursor())
+	t.Log("i:", list.Index())
+	t.Log("gi:", list.GlobalIndex())
+
+	list.CursorDown()
+	t.Log("moved cursor")
+
+	// cursor at 1
+	t.Log("cursor", list.Cursor())
+	t.Log("i:", list.Index())
+	t.Log("gi:", list.GlobalIndex())
+
+	list.CursorDown()
+	t.Log("moved cursor")
+
+	// cursor at 2, gi at 3
+	t.Log("cursor", list.Cursor())
+	t.Log("i:", list.Index())
+	t.Log("gi:", list.GlobalIndex())
+
+	list.CursorDown()
+	t.Log("moved cursor")
+
+	// cursor at 2, gi at 5
+	t.Log("cursor", list.Cursor())
+	t.Log("i:", list.Index())
+	t.Log("gi:", list.GlobalIndex())
+
+	t.Log("\n", list.View())
+	realIndex := list.GlobalIndex()
+
+	if realIndex != 5 {
+		t.Fatalf("expected the item's index to be 5, got %d", realIndex)
+	}
+}