Resolve #200, ignore empty conditional format style

excelize_test.go

@@ -978,7 +978,7 @@ func TestConditionalFormat(t *testing.T) {
 
 	fillCells(f, sheet1, 10, 15)
 
-	var format1, format2, format3 int
+	var format1, format2, format3, format4 int
 	var err error
 	// Rose format for bad conditional.
 	format1, err = f.NewConditionalStyle(`{"font":{"color":"#9A0511"},"fill":{"type":"pattern","color":["#FEC7CE"],"pattern":1}}`)
@@ -998,6 +998,12 @@ func TestConditionalFormat(t *testing.T) {
 		t.FailNow()
 	}
 
+	// conditional style with align and left border.
+	format4, err = f.NewConditionalStyle(`{"alignment":{"wrap_text":true},"border":[{"type":"left","color":"#000000","style":1}]}`)
+	if !assert.NoError(t, err) {
+		t.FailNow()
+	}
+
 	// Color scales: 2 color.
 	assert.NoError(t, f.SetConditionalFormat(sheet1, "A1:A10", `[{"type":"2_color_scale","criteria":"=","min_type":"min","max_type":"max","min_color":"#F8696B","max_color":"#63BE7B"}]`))
 	// Color scales: 3 color.
@@ -1022,8 +1028,13 @@ func TestConditionalFormat(t *testing.T) {
 	assert.NoError(t, f.SetConditionalFormat(sheet1, "K1:K10", `[{"type":"data_bar", "criteria":"=", "min_type":"min","max_type":"max","bar_color":"#638EC6"}]`))
 	// Use a formula to determine which cells to format.
 	assert.NoError(t, f.SetConditionalFormat(sheet1, "L1:L10", fmt.Sprintf(`[{"type":"formula", "criteria":"L2<3", "format":%d}]`, format1)))
-	// Test set invalid format set in conditional format
+	// Alignment/Border cells rules.
+	assert.NoError(t, f.SetConditionalFormat(sheet1, "M1:M10", fmt.Sprintf(`[{"type":"cell","criteria":">","format":%d,"value":"0"}]`, format4)))
+
+	// Test set invalid format set in conditional format.
 	assert.EqualError(t, f.SetConditionalFormat(sheet1, "L1:L10", ""), "unexpected end of JSON input")
+	// Set conditional format on not exists worksheet.
+	assert.EqualError(t, f.SetConditionalFormat("SheetN", "L1:L10", "[]"), "sheet SheetN is not exist")
 
 	err = f.SaveAs(filepath.Join("test", "TestConditionalFormat.xlsx"))
 	if !assert.NoError(t, err) {
@@ -1053,7 +1064,7 @@ func TestConditionalFormatError(t *testing.T) {
 
 	fillCells(f, sheet1, 10, 15)
 
-	// Set conditional format with illegal JSON string should return error
+	// Set conditional format with illegal JSON string should return error.
 	_, err := f.NewConditionalStyle("")
 	if !assert.EqualError(t, err, "unexpected end of JSON input") {
 		t.FailNow()

styles.go

@@ -1943,9 +1943,13 @@ func (f *File) NewConditionalStyle(style string) (int, error) {
 		return 0, err
 	}
 	dxf := dxf{
-		Fill:      setFills(fs, false),
-		Alignment: setAlignment(fs),
-		Border:    setBorders(fs),
+		Fill: setFills(fs, false),
+	}
+	if fs.Alignment != nil {
+		dxf.Alignment = setAlignment(fs)
+	}
+	if len(fs.Border) > 0 {
+		dxf.Border = setBorders(fs)
 	}
 	if fs.Font != nil {
 		dxf.Font = f.setFont(fs)