tui: add sortable files dashboard table modes (task 364)

1 files changed, 40 insertions, 0 deletions

diff --git a/internal/tui/dashboard/files_test.go b/internal/tui/dashboard/files_test.go
index 1be958a..87ada56 100644
--- a/internal/tui/dashboard/files_test.go
+++ b/internal/tui/dashboard/files_test.go
@@ -27,6 +27,12 @@ func TestRenderFilesIncludesHeaders(t *testing.T) {
 			t.Fatalf("expected token %q in files table output", token)
 		}
 	}
+	if !strings.Contains(out, "s:sort") {
+		t.Fatalf("expected files sort hint in output")
+	}
+	if !strings.Contains(out, "sort: default") {
+		t.Fatalf("expected files default sort label in output")
+	}
 }
 
 func TestRenderFilesNoData(t *testing.T) {
@@ -106,3 +112,37 @@ func TestDirPathWidthAccountsForFilesColumn(t *testing.T) {
 		t.Fatalf("expected dirPathWidth to reserve 6 extra chars, got dir=%d file=%d", got, filePathWidth(180))
 	}
 }
+
+func TestSortedFileSnapshotsUsesSelectedSortKey(t *testing.T) {
+	rows := []statsengine.FileSnapshot{
+		{Path: "/tmp/z.log", Accesses: 9, BytesRead: 10},
+		{Path: "/tmp/a.log", Accesses: 3, BytesRead: 50},
+	}
+
+	sorted := sortedFileSnapshots(rows, tableSortState[fileSortKey]{active: true, key: fileSortKeyPath})
+	if sorted[0].Path != "/tmp/a.log" {
+		t.Fatalf("expected path sort to put /tmp/a.log first, got %q", sorted[0].Path)
+	}
+
+	sorted = sortedFileSnapshots(rows, tableSortState[fileSortKey]{active: true, key: fileSortKeyRead})
+	if sorted[0].Path != "/tmp/a.log" {
+		t.Fatalf("expected read desc sort to put /tmp/a.log first, got %q", sorted[0].Path)
+	}
+}
+
+func TestSortedDirSnapshotsUsesSelectedSortKey(t *testing.T) {
+	rows := []DirSnapshot{
+		{Dir: "/var/log", Accesses: 9, FileCount: 1},
+		{Dir: "/tmp", Accesses: 3, FileCount: 4},
+	}
+
+	sorted := sortedDirSnapshots(rows, tableSortState[fileDirSortKey]{active: true, key: fileDirSortKeyDir})
+	if sorted[0].Dir != "/tmp" {
+		t.Fatalf("expected dir sort to put /tmp first, got %q", sorted[0].Dir)
+	}
+
+	sorted = sortedDirSnapshots(rows, tableSortState[fileDirSortKey]{active: true, key: fileDirSortKeyFileCount})
+	if sorted[0].Dir != "/tmp" {
+		t.Fatalf("expected file-count sort to put /tmp first, got %q", sorted[0].Dir)
+	}
+}