Merge pull request #81 from Teamwork/feat-ceil-plus

Feat: expand mathutil to add CeilPlus

mathutil/mathutil.go

@@ -24,6 +24,14 @@ func RoundPlus(f float64, precision int) float64 {
 	return Round(f*shift) / shift
 }
 
+// CeilPlus will ceil the value to the given precision.
+//
+// e.g. CeilPlus(123.233333, 2) will return 123.24
+func CeilPlus(f float64, precision int) float64 {
+	multiplier := math.Pow10(precision)
+	return math.Ceil(f*multiplier) / multiplier
+}
+
 // Min gets the lowest of two numbers.
 func Min(a, b int64) int64 {
 	if a > b {

mathutil/mathutil_test.go

@@ -37,6 +37,7 @@ func TestRoundPlus(t *testing.T) {
 		{123.555555, 3, 123.556},
 		{123.558, 2, 123.56},
 		{-123.555555, 3, -123.556},
+		{123.233333, 2, 123.23},
 	}
 
 	for _, c := range cases {
@@ -48,6 +49,27 @@ func TestRoundPlus(t *testing.T) {
 
 }
 
+func TestCeilPlus(t *testing.T) {
+	cases := []struct {
+		in        float64
+		precision int
+		want      float64
+	}{
+		{123.554999, 3, 123.555},
+		{123.555555, 3, 123.556},
+		{123.558, 2, 123.56},
+		{-123.555555, 3, -123.555},
+		{123.233333, 2, 123.24},
+	}
+
+	for _, c := range cases {
+		got := CeilPlus(c.in, c.precision)
+		if got != c.want {
+			t.Errorf("CeilPlus(%f) => %f, want %f", c.in, got, c.want)
+		}
+	}
+}
+
 func TestIsSignedZero(t *testing.T) {
 	cases := []struct {
 		in   string