package display

import (
	"fmt"
	"testing"
)

func TestFormatPrice(t *testing.T) {
	cases := []struct {
		in   float64
		want string
	}{
		{0, "0.00"},
		{1898.76, "1898.76"},
		{1, "1.00"},
		{0.00000059, "0.00000059"},
		{-0.00000059, "-0.00000059"},
		{0.5, "0.5"},
	}
	for _, tc := range cases {
		if got := FormatPrice(tc.in); got != tc.want {
			t.Errorf("FormatPrice(%v)=%q want %q", tc.in, got, tc.want)
		}
	}
}

func TestDecimalPrintfKeepsTinyPrice(t *testing.T) {
	d := Decimal(0.00000059)
	if got := fmt.Sprintf("%.2f", d); got != "0.00000059" {
		t.Fatalf("%%.2f=%q", got)
	}
	if got := fmt.Sprintf("%v", d); got != "0.00000059" {
		t.Fatalf("%%v=%q", got)
	}
	if got := fmt.Sprintf("%.2f", Decimal(1898.76)); got != "1898.76" {
		t.Fatalf("eth %%.2f=%q", got)
	}
	if got := fmt.Sprintf("%.2f", Decimal(1000000000)); got != "1000000000.00" {
		t.Fatalf("qty %%.2f=%q", got)
	}
}

func TestWrapMapDoesNotMutate(t *testing.T) {
	in := map[string]interface{}{"price": 0.00000059}
	out := WrapMap(in)
	if _, ok := in["price"].(float64); !ok {
		t.Fatalf("input mutated: %T", in["price"])
	}
	if _, ok := out["price"].(Decimal); !ok {
		t.Fatalf("wrapped type=%T", out["price"])
	}
}