test: add CalcFormulaValue test case

calc.go

@@ -815,7 +815,7 @@ func (f *File) calcCellValue(ctx *calcContext, sheet, cell string) (result formu
 	return
 }
 
-func (f *File) CalcFormulaValue(ctx *calcContext, sheet, formula string) (result string, err error) {
+func (f *File) CalcFormulaValue(sheet, formula string) (result string, err error) {
 	var (
 		token formulaArg
 	)
@@ -824,7 +824,12 @@ func (f *File) CalcFormulaValue(ctx *calcContext, sheet, formula string) (result
 	if tokens == nil {
 		return
 	}
-	if token, err = f.evalInfixExp(ctx, sheet, "", tokens); err != nil {
+	if token, err = f.evalInfixExp(&calcContext{
+		entry:             fmt.Sprintf("%s!%s", sheet, ""),
+		maxCalcIterations: getOptions().MaxCalcIterations,
+		iterations:        make(map[string]uint),
+		iterationsCache:   make(map[string]formulaArg),
+	}, sheet, "", tokens); err != nil {
 		return
 	}
 	result = token.Value()

calc_test.go

@@ -5888,3 +5888,50 @@ func TestCalcCellResolver(t *testing.T) {
 		assert.Equal(t, expected, result, formula)
 	}
 }
+
+func TestFile_CalcFormulaValue(t *testing.T) {
+	cellData := [][]interface{}{
+		{1, 4, nil, "Month", "Team", "Sales"},
+		{2, 5, nil, "Jan", "North 1", 36693},
+		{3, nil, nil, "Jan", "North 2", 22100},
+		{0, nil, nil, "Jan", "South 1", 53321},
+		{nil, nil, nil, "Jan", "South 2", 34440},
+		{nil, nil, nil, "Feb", "North 1", 29889},
+		{nil, nil, nil, "Feb", "North 2", 50090},
+		{nil, nil, nil, "Feb", "South 1", 32080},
+		{nil, nil, nil, "Feb", "South 2", 45500},
+	}
+	type args struct {
+		sheet   string
+		formula string
+	}
+	tests := []struct {
+		name       string
+		f          *File
+		args       args
+		wantResult string
+		wantErr    bool
+	}{
+		{
+			name: "test CalcFormulaValue",
+			f:    prepareCalcData(cellData),
+			args: args{
+				sheet:   "Sheet1",
+				formula: "A1+B1",
+			},
+			wantResult: "5",
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			gotResult, err := tt.f.CalcFormulaValue(tt.args.sheet, tt.args.formula)
+			if (err != nil) != tt.wantErr {
+				t.Errorf("File.CalcFormulaValue() error = %v, wantErr %v", err, tt.wantErr)
+				return
+			}
+			if gotResult != tt.wantResult {
+				t.Errorf("File.CalcFormulaValue() = %v, want %v", gotResult, tt.wantResult)
+			}
+		})
+	}
+}