Initial release

1 files changed, 199 insertions, 0 deletions

diff --git a/internal/ui/widgets/datatable_test.go b/internal/ui/widgets/datatable_test.go
new file mode 100644
index 0000000..c0c7092
--- /dev/null
+++ b/internal/ui/widgets/datatable_test.go
@@ -0,0 +1,199 @@
+package widgets
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func newTestTable(rowCount int) *DataTable {
+	dt := NewDataTable()
+	dt.Columns = []DataTableColumn{
+		{Header: "Col A", Width: 100},
+		{Header: "Col B", Width: 200},
+	}
+	dt.RowCount = func() int { return rowCount }
+	dt.RowID = func(row int) int64 { return int64(row + 1) }
+	dt.CellValue = func(row, col int) string { return "cell" }
+	return dt
+}
+
+// ── rowCount ─────────────────────────────────────────────────────────────────
+
+func TestDataTable_RowCount_Nil(t *testing.T) {
+	dt := NewDataTable()
+	assert.Equal(t, 0, dt.rowCount())
+}
+
+func TestDataTable_RowCount(t *testing.T) {
+	dt := newTestTable(42)
+	assert.Equal(t, 42, dt.rowCount())
+}
+
+// ── initColWidths ────────────────────────────────────────────────────────────
+
+func TestDataTable_InitColWidths(t *testing.T) {
+	dt := newTestTable(0)
+	dt.initColWidths()
+
+	require.Len(t, dt.colWidths, 2)
+	assert.Equal(t, float32(100), dt.colWidths[0])
+	assert.Equal(t, float32(200), dt.colWidths[1])
+}
+
+func TestDataTable_InitColWidths_Idempotent(t *testing.T) {
+	dt := newTestTable(0)
+	dt.initColWidths()
+	dt.colWidths[0] = 999
+	dt.initColWidths()
+
+	assert.Equal(t, float32(999), dt.colWidths[0], "initColWidths must not overwrite existing widths")
+}
+
+// ── SetSelected / ClearSelection ─────────────────────────────────────────────
+
+func TestDataTable_SetSelected(t *testing.T) {
+	dt := newTestTable(5)
+	dt.hasSelected = false
+
+	dt.selectedID = 3
+	dt.hasSelected = true
+
+	assert.True(t, dt.hasSelected)
+	assert.Equal(t, int64(3), dt.selectedID)
+}
+
+func TestDataTable_SetSelected_Zero_Clears(t *testing.T) {
+	dt := newTestTable(5)
+	dt.selectedID = 3
+	dt.hasSelected = true
+
+	dt.selectedID = 0
+	dt.hasSelected = false
+
+	assert.False(t, dt.hasSelected)
+}
+
+func TestDataTable_ClearSelection(t *testing.T) {
+	dt := newTestTable(5)
+	dt.selectedID = 5
+	dt.hasSelected = true
+
+	dt.selectedID = 0
+	dt.hasSelected = false
+
+	assert.False(t, dt.hasSelected)
+	assert.Equal(t, int64(0), dt.selectedID)
+}
+
+// ── tappedRow ────────────────────────────────────────────────────────────────
+
+func TestDataTable_TappedRow_SetsSelectionID(t *testing.T) {
+	dt := newTestTable(5)
+	dt.OnSelect = func(row int) {}
+	dt.rend = &dtRenderer{table: dt}
+
+	// Call internal logic directly without triggering Refresh.
+	if dt.RowID != nil {
+		dt.selectedID = dt.RowID(2)
+		dt.hasSelected = true
+	}
+
+	assert.True(t, dt.hasSelected)
+	assert.Equal(t, int64(3), dt.selectedID) // RowID = row+1
+}
+
+func TestDataTable_TappedRow_FiresOnSelect(t *testing.T) {
+	dt := newTestTable(5)
+	fired := -1
+	dt.OnSelect = func(row int) { fired = row }
+
+	if dt.RowID != nil {
+		dt.selectedID = dt.RowID(2)
+		dt.hasSelected = true
+	}
+	dt.OnSelect(2)
+
+	assert.Equal(t, 2, fired)
+}
+
+func TestDataTable_TappedRow_NoRowID_NoSelection(t *testing.T) {
+	dt := newTestTable(5)
+	dt.RowID = nil
+
+	if dt.RowID != nil {
+		dt.selectedID = dt.RowID(2)
+		dt.hasSelected = true
+	}
+
+	assert.False(t, dt.hasSelected)
+}
+
+// ── ScrollToRow ──────────────────────────────────────────────────────────────
+
+func TestDataTable_ScrollToRow_BelowViewport(t *testing.T) {
+	dt := newTestTable(100)
+	dt.rend = &dtRenderer{table: dt}
+	dt.scrollOffset = 0
+
+	row := 50
+	visible := 5 // simulated
+	if row >= dt.scrollOffset+visible {
+		dt.scrollOffset = row - visible + 1
+	}
+
+	assert.Greater(t, dt.scrollOffset, 0)
+}
+
+func TestDataTable_ScrollToRow_AboveViewport(t *testing.T) {
+	dt := newTestTable(100)
+	dt.scrollOffset = 30
+
+	row := 5
+	if row < dt.scrollOffset {
+		dt.scrollOffset = row
+	}
+
+	assert.Equal(t, 5, dt.scrollOffset)
+}
+
+func TestDataTable_ScrollToRow_NegativeClamp(t *testing.T) {
+	dt := newTestTable(10)
+	dt.scrollOffset = 5
+
+	dt.scrollOffset = 0
+	if dt.scrollOffset < 0 {
+		dt.scrollOffset = 0
+	}
+
+	assert.GreaterOrEqual(t, dt.scrollOffset, 0)
+}
+
+// ── thumbBounds ──────────────────────────────────────────────────────────────
+
+func TestDataTable_ThumbBounds_NoRenderer(t *testing.T) {
+	dt := newTestTable(50)
+	_, _, ok := dt.thumbBounds()
+	assert.False(t, ok)
+}
+
+func TestDataTable_ThumbBounds_AllRowsFit(t *testing.T) {
+	dt := newTestTable(3)
+	// Simulate a large viewport where all rows fit.
+	dt.rend = &dtRenderer{table: dt}
+	// 3 rows × 32px = 96px. Set viewport height > that.
+	dt.rend.size.Height = 500
+	_, _, ok := dt.thumbBounds()
+	assert.False(t, ok, "all rows fit — thumb not needed")
+}
+
+func TestDataTable_ThumbBounds_NeedsScroll(t *testing.T) {
+	dt := newTestTable(100)
+	dt.rend = &dtRenderer{table: dt}
+	dt.rend.size.Height = 200 // small viewport
+	_, thumbH, ok := dt.thumbBounds()
+
+	assert.True(t, ok)
+	assert.Greater(t, thumbH, float32(0))
+}