ascii: add coverage for GetFont and rendering

1 files changed, 87 insertions, 0 deletions

diff --git a/internal/ascii/render_test.go b/internal/ascii/render_test.go
new file mode 100644
index 0000000..1ba4f90
--- /dev/null
+++ b/internal/ascii/render_test.go
@@ -0,0 +1,87 @@
+package ascii
+
+import (
+	"testing"
+
+	"github.com/charmbracelet/lipgloss"
+)
+
+func TestGetFont(t *testing.T) {
+	tests := []struct {
+		name     string
+		fontName string
+		want     Font
+	}{
+		{
+			name:     "known font",
+			fontName: Rebel,
+			want:     fonts[Rebel],
+		},
+		{
+			name:     "unknown font falls back to default",
+			fontName: "missing-font",
+			want:     fonts[DefaultFont],
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := GetFont(tt.fontName)
+			if got != tt.want {
+				t.Fatalf("GetFont(%q) returned unexpected font", tt.fontName)
+			}
+		})
+	}
+}
+
+func TestRenderNumber(t *testing.T) {
+	font := fonts[Mono12]
+
+	tests := []struct {
+		name   string
+		input  string
+		expect string
+	}{
+		{
+			name:   "digits and colon",
+			input:  "10:2",
+			expect: lipgloss.JoinHorizontal(lipgloss.Top, font[1], font[0], font[10], font[2]),
+		},
+		{
+			name:   "unsupported runes are empty",
+			input:  "1x2",
+			expect: lipgloss.JoinHorizontal(lipgloss.Top, font[1], "", font[2]),
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := RenderNumber(tt.input, font)
+			if got != tt.expect {
+				t.Fatalf("RenderNumber(%q) returned unexpected output", tt.input)
+			}
+		})
+	}
+}
+
+func TestRenderDigit(t *testing.T) {
+	font := fonts[Ansi]
+
+	tests := []struct {
+		name  string
+		input rune
+		want  string
+	}{
+		{name: "digit", input: '3', want: font[3]},
+		{name: "colon", input: ':', want: font[10]},
+		{name: "unsupported", input: 'x', want: ""},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := renderDigit(tt.input, font); got != tt.want {
+				t.Fatalf("renderDigit(%q) = %q, want %q", tt.input, got, tt.want)
+			}
+		})
+	}
+}