IntUnscaled method (#18)

nikolaydubina · May 9, 2023 · 399acc9 · 399acc9
1 parent aae2dfb
commit 399acc9
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diff --git a/fpdecimal.go b/fpdecimal.go
@@ -31,6 +31,8 @@ func FromFloat[T constraints.Float](v T) Decimal {
 
 func FromIntScaled[T constraints.Integer](v T) Decimal { return Decimal{int64(v)} }
 
+func (a Decimal) Scaled() int64 { return a.v }
+
 func (a Decimal) Float32() float32 { return float32(a.v) / float32(multipliers[FractionDigits]) }
 
 func (a Decimal) Float64() float64 { return float64(a.v) / float64(multipliers[FractionDigits]) }

diff --git a/fpdecimal_test.go b/fpdecimal_test.go
@@ -178,6 +178,26 @@ func FuzzToFloat(f *testing.F) {
 	})
 }
 
+func FuzzScaled(f *testing.F) {
+	tests := []float64{
+		0,
+		0.001,
+		1,
+		123.456,
+	}
+	for _, tc := range tests {
+		f.Add(tc)
+		f.Add(-tc)
+	}
+	f.Fuzz(func(t *testing.T, v float64) {
+		a := fpdecimal.FromFloat(v)
+
+		if int64(v*1000) != a.Scaled() {
+			t.Error(a, a.Scaled(), int64(v*1000))
+		}
+	})
+}
+
 var floatsForTests = []struct {
 	name string
 	vals []string