180 lines
3.5 KiB
Go
180 lines
3.5 KiB
Go
package wei
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import (
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"math"
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"testing"
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)
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func TestToEth(t *testing.T) {
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tests := []struct {
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name string
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wei string
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want float64
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wantErr bool
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}{
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{"zero string", "0", 0, false},
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{"empty string", "", 0, false},
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{"1 ETH", "1000000000000000000", 1.0, false},
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{"0.5 ETH", "500000000000000000", 0.5, false},
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{"10 ETH", "10000000000000000000", 10.0, false},
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{"small amount", "1000000000000000", 0.001, false},
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{"1 Wei", "1", 1e-18, false},
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{"invalid", "notanumber", 0, true},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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got, err := ToEth(tt.wei)
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if tt.wantErr {
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if err == nil {
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t.Fatal("expected error")
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}
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return
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}
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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if math.Abs(got-tt.want) > 1e-10 {
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t.Fatalf("ToEth(%q) = %v, want %v", tt.wei, got, tt.want)
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}
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})
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}
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}
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func TestFromEth(t *testing.T) {
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tests := []struct {
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name string
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eth float64
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want string
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wantErr bool
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}{
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{"zero", 0, "0", false},
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{"1 ETH", 1.0, "1000000000000000000", false},
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{"0.5 ETH", 0.5, "500000000000000000", false},
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{"10 ETH", 10.0, "10000000000000000000", false},
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{"0.001 ETH", 0.001, "1000000000000000", false},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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got, err := FromEth(tt.eth)
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if tt.wantErr {
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if err == nil {
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t.Fatal("expected error")
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}
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return
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}
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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if got != tt.want {
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t.Fatalf("FromEth(%v) = %q, want %q", tt.eth, got, tt.want)
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}
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})
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}
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}
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func TestRoundTrip(t *testing.T) {
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values := []float64{0.001, 0.1, 1.0, 5.5, 10.0, 100.0}
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for _, eth := range values {
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weiStr, err := FromEth(eth)
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if err != nil {
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t.Fatalf("FromEth(%v) error: %v", eth, err)
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}
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back, err := ToEth(weiStr)
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if err != nil {
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t.Fatalf("ToEth(%q) error: %v", weiStr, err)
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}
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if math.Abs(back-eth) > 1e-10 {
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t.Fatalf("round-trip %v → %q → %v (diff: %v)", eth, weiStr, back, back-eth)
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}
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}
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}
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func TestCompare(t *testing.T) {
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tests := []struct {
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name string
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a, b string
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want int
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}{
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{"equal", "1000", "1000", 0},
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{"a > b", "2000", "1000", 1},
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{"a < b", "1000", "2000", -1},
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{"zero equal", "0", "0", 0},
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}
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for _, tt := range tests {
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t.Run(tt.name, func(t *testing.T) {
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got, err := Compare(tt.a, tt.b)
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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if got != tt.want {
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t.Fatalf("Compare(%q, %q) = %d, want %d", tt.a, tt.b, got, tt.want)
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}
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})
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}
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}
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func TestGreaterThanOrEqual(t *testing.T) {
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ok, err := GreaterThanOrEqual("2000", "1000")
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if err != nil {
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t.Fatal(err)
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}
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if !ok {
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t.Fatal("expected true")
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}
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ok, err = GreaterThanOrEqual("1000", "1000")
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if err != nil {
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t.Fatal(err)
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}
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if !ok {
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t.Fatal("expected true for equal")
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}
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ok, err = GreaterThanOrEqual("500", "1000")
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if err != nil {
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t.Fatal(err)
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}
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if ok {
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t.Fatal("expected false")
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}
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}
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func TestLessThan(t *testing.T) {
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ok, err := LessThan("500", "1000")
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if err != nil {
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t.Fatal(err)
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}
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if !ok {
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t.Fatal("expected true")
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}
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ok, err = LessThan("1000", "1000")
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if err != nil {
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t.Fatal(err)
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}
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if ok {
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t.Fatal("expected false for equal")
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}
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}
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func TestFormatAsEth(t *testing.T) {
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got, err := FormatAsEth("1000000000000000000", 4)
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if err != nil {
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t.Fatal(err)
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}
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if got != "1.0000 ETH" {
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t.Fatalf("got %q, want %q", got, "1.0000 ETH")
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}
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got, err = FormatAsEth("500000000000000000", 2)
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if err != nil {
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t.Fatal(err)
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}
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if got != "0.50 ETH" {
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t.Fatalf("got %q, want %q", got, "0.50 ETH")
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}
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}
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