add template functions

img_test.go

@@ -0,0 +1,60 @@
+package libgofunc
+
+import (
+	"math"
+	"testing"
+)
+
+func TestDiv(t *testing.T) {
+	tests := []struct {
+		name string
+		a    any
+		b    any
+		want float64
+	}{
+		{"Float division", 10.5, 2.0, 5.25},
+		{"Float division", 4975, 1000, 4.975},
+		{"Integer division", 10, 4, 2.5},
+		{"Mixed types", int64(100), float64(4.0), 25.0},
+		{"Division by zero (float)", 10.0, 0.0, 0.0},
+		{"Division by zero (int)", 5, 0, 0.0},
+		{"Unsupported type defaults to zero", "string", 2, 0.0},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := Div(tt.a, tt.b)
+			if got != tt.want {
+				t.Errorf("TemplateDiv() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+func TestFormatNumber(t *testing.T) {
+	tests := []struct {
+		name      string
+		precision int
+		val       any
+		want      string
+	}{
+		{"Standard float with commas", 2, 1234567.891, "1,234,567.89"},
+		{"Standard float with commas", 3, 4.975, "4.975"},
+		{"Integer input with commas", 0, 5000000, "5,000,000"},
+		{"Integer input forced decimals", 2, 5000, "5,000.00"},
+		{"Negative float commas", 2, -9876543.21, "-9,876,543.21"},
+		{"Small float rounding up", 2, 0.128, "0.13"},
+		{"Small float rounding down", 2, 0.123, "0.12"},
+		{"Handling NaN", 2, math.NaN(), ""},
+		{"Handling Inf", 2, math.Inf(1), ""},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := FormatNumber(tt.precision, tt.val)
+			if got != tt.want {
+				t.Errorf("TemplateFloat() = %q, want %q", got, tt.want)
+			}
+		})
+	}
+}