feat: add new functions to mathutil package

mathutil/mathutil_test.go

@@ -180,3 +180,46 @@ func TestLog(t *testing.T) {
 	assert.EqualValues(3, TruncRound(Log(27, 3), 0))
 	assert.EqualValues(2.32, TruncRound(Log(5, 2), 2))
 }
+
+func TestFloorToFloat(t *testing.T) {
+	t.Parallel()
+
+	assert := internal.NewAssert(t, "TestFloorToFloat")
+
+	assert.Equal(3.14, FloorToFloat(3.14159, 2))
+	assert.Equal(3.141, FloorToFloat(3.14159, 3))
+	assert.Equal(5.0, FloorToFloat(5, 4))
+	assert.Equal(2.0, FloorToFloat(9/4, 2))
+}
+
+func TestFloorToString(t *testing.T) {
+	t.Parallel()
+
+	assert := internal.NewAssert(t, "TestFloorToString")
+
+	assert.Equal("3.14", FloorToString(3.14159, 2))
+	assert.Equal("3.141", FloorToString(3.14159, 3))
+	assert.Equal("5.0000", FloorToString(5, 4))
+}
+
+func TestCeilToFloat(t *testing.T) {
+	t.Parallel()
+
+	assert := internal.NewAssert(t, "TestCeilToFloat")
+
+	assert.Equal(3.15, CeilToFloat(3.14159, 2))
+	assert.Equal(3.142, CeilToFloat(3.14159, 3))
+	assert.Equal(5.0, CeilToFloat(5, 4))
+	assert.Equal(0.15, CeilToFloat(float64(1)/float64(7), 2))
+}
+
+func TestCeilToString(t *testing.T) {
+	t.Parallel()
+
+	assert := internal.NewAssert(t, "TestCeilToFloat")
+
+	assert.Equal("3.15", CeilToString(3.14159, 2))
+	assert.Equal("3.142", CeilToString(3.14159, 3))
+	assert.Equal("5.0000", CeilToString(5, 4))
+	assert.Equal("0.15", CeilToString(float64(1)/float64(7), 2))
+}