chore: import upstream snapshot with attribution

internal/cli/transcript_test.go

@@ -0,0 +1,78 @@
+package cli
+
+import (
+	"reflect"
+	"testing"
+
+	tea "charm.land/bubbletea/v2"
+)
+
+func TestScrollbarThumb(t *testing.T) {
+	if _, size := scrollbarThumb(10, 0, 5); size != 0 {
+		t.Errorf("content within viewport should have no thumb, got size %d", size)
+	}
+	if start, _ := scrollbarThumb(10, 0, 100); start != 0 {
+		t.Errorf("at top the thumb starts at row 0, got %d", start)
+	}
+	const h, total = 10, 100
+	if start, size := scrollbarThumb(h, total-h, total); start+size != h {
+		t.Errorf("at bottom the thumb reaches the last row: start=%d size=%d h=%d", start, size, h)
+	}
+}
+
+func TestEdgeScrollDir(t *testing.T) {
+	const h = 10
+	if got := edgeScrollDir(0, h); got != -1 {
+		t.Errorf("top edge dir = %d, want -1", got)
+	}
+	if got := edgeScrollDir(h-1, h); got != 1 {
+		t.Errorf("bottom edge dir = %d, want 1", got)
+	}
+	if got := edgeScrollDir(h/2, h); got != 0 {
+		t.Errorf("middle dir = %d, want 0", got)
+	}
+}
+
+func TestSelSpan(t *testing.T) {
+	start, end, cw := selPos{line: 1, col: 3}, selPos{line: 3, col: 5}, 20
+	for _, tc := range []struct {
+		idx         int
+		wantOK      bool
+		wantLo, wHi int
+	}{
+		{0, false, 0, 0}, // above
+		{1, true, 3, cw}, // first line: anchor col → right edge
+		{2, true, 0, cw}, // middle line: full width
+		{3, true, 0, 5},  // last line: left edge → head col
+		{4, false, 0, 0}, // below
+	} {
+		lo, hi, ok := selSpan(tc.idx, start, end, cw)
+		if ok != tc.wantOK || (ok && (lo != tc.wantLo || hi != tc.wHi)) {
+			t.Errorf("selSpan(%d) = (%d,%d,%v), want (%d,%d,%v)", tc.idx, lo, hi, ok, tc.wantLo, tc.wHi, tc.wantOK)
+		}
+	}
+}
+
+func TestSelectedTextMultiLine(t *testing.T) {
+	m := newTestChatTUI()
+	m.wrappedLines = []string{"hello world", "second line", "third row"}
+	m.sel = selection{active: true, anchor: selPos{line: 0, col: 6}, head: selPos{line: 2, col: 5}}
+
+	if got, want := m.selectedText(), "world\nsecond line\nthird"; got != want {
+		t.Errorf("selectedText() = %q, want %q", got, want)
+	}
+
+	// A zero-width selection (plain click) copies nothing.
+	m.sel = selection{active: true, anchor: selPos{line: 0, col: 3}, head: selPos{line: 0, col: 3}}
+	if got := m.selectedText(); got != "" {
+		t.Errorf("empty selection should yield no text, got %q", got)
+	}
+}
+
+func TestCopyToClipboard(t *testing.T) {
+	got := copyToClipboard("hello")()
+	want := tea.SetClipboard("hello")()
+	if !reflect.DeepEqual(got, want) {
+		t.Fatalf("copyToClipboard returned %#v, want %#v", got, want)
+	}
+}