Add Min & Max support

decimal.go

@@ -125,6 +125,24 @@ func (d Decimal) Cmp(other Decimal) int {
 	return d.fl.Cmp(other.fl)
 }
 
+// Max will return the max Decimal between two Decimals
+func (d Decimal) Max(other Decimal) Decimal {
+	if d.GTE(other) {
+		return d
+	}
+
+	return other
+}
+
+// Min will return the min Decimal between two Decimals
+func (d Decimal) Min(other Decimal) Decimal {
+	if d.LTE(other) {
+		return d
+	}
+
+	return other
+}
+
 // Float will return this Decimal as a float value.
 // Note that there may be some loss of precision in this operation.
 func (d Decimal) Float() float64 {

decimal_test.go

@@ -262,3 +262,50 @@ func TestDecimal_Sql(t *testing.T) {
 		assert.EqualValues(t, "Passed value 1.23 should be a string", err.Error())
 	})
 }
+
+func TestDecimal_Max(t *testing.T) {
+	t.Run("a > b", func(t *testing.T) {
+		a := NewDecimal(2)
+		b := NewDecimal(1)
+
+		assert.Equal(t, a.Max(b), a)
+	})
+
+	t.Run("a = b", func(t *testing.T) {
+
+		a := NewDecimal(1)
+		b := NewDecimal(1)
+
+		assert.Equal(t, a.Max(b), a)
+	})
+
+	t.Run("a < b", func(t *testing.T) {
+		a := NewDecimal(1)
+		b := NewDecimal(2)
+
+		assert.Equal(t, a.Max(b), b)
+	})
+}
+
+func TestDecimal_Min(t *testing.T) {
+	t.Run("a > b", func(t *testing.T) {
+		a := NewDecimal(2)
+		b := NewDecimal(1)
+
+		assert.Equal(t, a.Min(b), b)
+	})
+
+	t.Run("a = b", func(t *testing.T) {
+		a := NewDecimal(1)
+		b := NewDecimal(1)
+
+		assert.Equal(t, a.Min(b), a)
+	})
+
+	t.Run("a < b", func(t *testing.T) {
+		a := NewDecimal(1)
+		b := NewDecimal(2)
+
+		assert.Equal(t, a.Min(b), a)
+	})
+}