Fix CalcCellValue does not return raw value when enable RawCellValue (#1803)

Author: funa12

calc.go

@@ -823,7 +823,7 @@ func (f *File) CalcCellValue(sheet, cell string, opts ...Options) (result string
 		styleIdx, _ = f.GetCellStyle(sheet, cell)
 	}
 	result = token.Value()
-	if isNum, precision, decimal := isNumeric(result); isNum {
+	if isNum, precision, decimal := isNumeric(result); isNum && !rawCellValue {
 		if precision > 15 {
 			result, err = f.formattedValue(&xlsxC{S: styleIdx, V: strings.ToUpper(strconv.FormatFloat(decimal, 'G', 15, 64))}, rawCellValue, CellTypeNumber)
 			return

calc_test.go

@@ -6301,6 +6301,28 @@ func TestNestedFunctionsWithOperators(t *testing.T) {
 	}
 }
 
+func TestFormulaRawCellValueOption(t *testing.T) {
+	f := NewFile()
+	rawTest := []struct {
+		value    string
+		raw      bool
+		expected string
+	}{
+		{"=\"10e3\"", false, "10000"},
+		{"=\"10e3\"", true, "10e3"},
+		{"=\"10\" & \"e3\"", false, "10000"},
+		{"=\"10\" & \"e3\"", true, "10e3"},
+		{"=\"1111111111111111\"", false, "1.11111111111111E+15"},
+		{"=\"1111111111111111\"", true, "1111111111111111"},
+	}
+	for _, test := range rawTest {
+		assert.NoError(t, f.SetCellFormula("Sheet1", "A1", test.value))
+		val, err := f.CalcCellValue("Sheet1", "A1", Options{RawCellValue: test.raw})
+		assert.NoError(t, err)
+		assert.Equal(t, test.expected, val)
+	}
+}
+
 func TestFormulaArgToToken(t *testing.T) {
 	assert.Equal(t,
 		efp.Token{