diff --git a/.gitignore b/.gitignore
index b64031e..18554cd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -19,3 +19,9 @@ tmp
 *.htm
 *.html
 *.sheetjs
+
+lab/
+test_files
+example.js
+example2.js
+.idea
diff --git a/test-style.js b/test-style.js
deleted file mode 100644
index 0f57293..0000000
--- a/test-style.js
+++ /dev/null
@@ -1,661 +0,0 @@
-var XLSX = require('./');
-
-var JSZip = require('jszip');
-var fs = require('fs');
-var cheerio = require('cheerio');
-
-var assert = require('assert');
-
-function JSDateToExcelDate(inDate) {
-  return 25569.0 + ((inDate.getTime() - (inDate.getTimezoneOffset() * 60 * 1000)) / (1000 * 60 * 60 * 24));
-}
-
-var defaultCellStyle = { font: { name: "Verdana", sz: 11, color: "FF00FF88"}, fill: {fgColor: {rgb: "FFFFAA00"}}};
-
-// test to see if everything on the left equals its counterpart on the right
-// but the right hand object may have other attributes which we might not care about
-function basicallyEquals(left, right) {
-  if (Array.isArray(left) && Array.isArray(right)) {
-    for (var i=0; i<left.length; i++) {
-      if (!basicallyEquals(left[i], right[i] )) {
-        return false;
-      }
-    }
-    return true;
-  }
-  else if (typeof left == 'object' && typeof right == 'object') {
-    for (var key in left) {
-      if (key != 'bgColor') {
-        if (!basicallyEquals(left[key], right[key] )) {
-          if (JSON.stringify(left[key])=="{}" && right[key] == undefined) return true;
-          if (JSON.stringify(right[key])=="{}" && left[key] == undefined) return true;
-          return false;
-        }
-      }
-    }
-    return true;
-  }
-  else {
-    if (left != right) {
-      return false;
-    }
-    return true;
-  }
-}
-
-describe("Export styles", function () {
-  var workbook, wbout, wbin;
-
-  before(function () {
-    workbook = {
-      "SheetNames": [
-        "Main"
-      ],
-      "Sheets": {
-        "Main": {
-          "!merges": [
-            {
-              "s": {
-                "c": 0,
-                "r": 0
-              },
-              "e": {
-                "c": 2,
-                "r": 0
-              }
-            }
-          ],
-          "A1": {
-            "v": "This is a submerged cell",
-            "s": {
-              "border": {
-                "left": {
-                  "style": "thick",
-                  "color": {
-                    "auto": 1
-                  }
-                },
-                "top": {
-                  "style": "thick",
-                  "color": {
-                    "auto": 1
-                  }
-                },
-                "bottom": {
-                  "style": "thick",
-                  "color": {
-                    "auto": 1
-                  }
-                }
-              }
-            },
-            "t": "s"
-          },
-          "B1": {
-            "v": "Pirate ship",
-            "s": {
-              "border": {
-                "top": {
-                  "style": "thick",
-                  "color": {
-                    "auto": 1
-                  }
-                },
-                "bottom": {
-                  "style": "thick",
-                  "color": {
-                    "auto": 1
-                  }
-                }
-              }
-            },
-            "t": "s"
-          },
-          "C1": {
-            "v": "Sunken treasure",
-            "s": {
-              "border": {
-                "right": {
-                  "style": "thick",
-                  "color": {
-                    "auto": 1
-                  }
-                },
-                "top": {
-                  "style": "thick",
-                  "color": {
-                    "auto": 1
-                  }
-                },
-                "bottom": {
-                  "style": "thick",
-                  "color": {
-                    "auto": 1
-                  }
-                }
-              }
-            },
-            "t": "s"
-          },
-          "A2": {
-            "v": "Blank",
-            "t": "s"
-          },
-          "B2": {
-            "v": "Red",
-            "s": {
-              "fill": {
-                "fgColor": {
-                  "rgb": "FFFF0000"
-                }
-              }
-            },
-            "t": "s"
-          },
-          "C2": {
-            "v": "Green",
-            "s": {
-              "fill": {
-                "fgColor": {
-                  "rgb": "FF00FF00"
-                }
-              }
-            },
-            "t": "s"
-          },
-          "D2": {
-            "v": "Blue",
-            "s": {
-              "fill": {
-                "fgColor": {
-                  "rgb": "FF0000FF"
-                }
-              }
-            },
-            "t": "s"
-          },
-          "E2": {
-            "v": "Theme 5",
-            "s": {
-              "fill": {
-                "fgColor": {
-                  "theme": 5
-                }
-              }
-            },
-            "t": "s"
-          },
-          "F2": {
-            "v": "Theme 5 Tint -0.5",
-            "s": {
-              "fill": {
-                "fgColor": {
-                  "theme": 5,
-                  "tint": -0.5
-                }
-              }
-            },
-            "t": "s"
-          },
-          "A3": {
-            "v": "Default",
-            "t": "s"
-          },
-          "B3": {
-            "v": "Arial",
-            "s": {
-              "font": {
-                "name": "Arial",
-                "sz": 24,
-                "color": {
-                  "theme": "5"
-                }
-              }
-            },
-            "t": "s"
-          },
-          "C3": {
-            "v": "Times New Roman",
-            "s": {
-              "font": {
-                "name": "Times New Roman",
-                bold:true,
-                underline: true,
-                italic: true,
-                strike: true,
-                outline: true,
-                shadow: true,
-                vertAlign: "superscript",
-                "sz": 16,
-                "color": {
-                  "rgb": "FF2222FF"
-                }
-              }
-            },
-            "t": "s"
-          },
-          "D3": {
-            "v": "Courier New",
-            "s": {
-              "font": {
-                "name": "Courier New",
-                "sz": 14
-              }
-            },
-            "t": "s"
-          },
-          "A4": {
-            "v": 0.618033989,
-            "t": "n"
-          },
-          "B4": {
-            "v": 0.618033989,
-            "t": "n"
-          },
-          "C4": {
-            "v": 0.618033989,
-            "t": "n"
-          },
-          "D4": {
-            "v": 0.618033989,
-            "t": "n",
-            "s": {
-              "numFmt": "0.00%"
-            }
-          },
-          "E4": {
-            "v": 0.618033989,
-            "t": "n",
-            "s": {
-              "numFmt": "0.00%",
-              "fill": {
-                "fgColor": {
-                  "rgb": "FFFFCC00"
-                }
-              }
-            }
-          },
-          "A5": {
-            "v": 0.618033989,
-            "t": "n",
-            "s": {
-              "numFmt": "0%"
-            }
-          },
-          "B5": {
-            "v": 0.618033989,
-            "t": "n",
-            "s": {
-              "numFmt": "0.0%"
-            }
-          },
-          "C5": {
-            "v": 0.618033989,
-            "t": "n",
-            "s": {
-              "numFmt": "0.00%"
-            }
-          },
-          "D5": {
-            "v": 0.618033989,
-            "t": "n",
-            "s": {
-              "numFmt": "0.000%"
-            }
-          },
-          "E5": {
-            "v": 0.618033989,
-            "t": "n",
-            "s": {
-              "numFmt": "0.0000%"
-            }
-          },
-          "F5": {
-            "v": 0,
-            "t": "n",
-            "s": {
-              "numFmt": "0.00%;\\(0.00%\\);\\-;@",
-              "fill": {
-                "fgColor": {
-                  "rgb": "FFFFCC00"
-                }
-              }
-            }
-          },
-          "A6": {
-            "v": "Sat Mar 21 2015 23:47:34 GMT-0400 (EDT)",
-            "t": "s"
-          },
-          "B6": {
-            "v": 42084.99137416667,
-            "t": "n"
-          },
-          "C6": {
-            "v": 42084.99137416667,
-            "s": {
-              "numFmt": "d-mmm-yy"
-            },
-            "t": "n"
-          },
-          "A7": {
-            "v": "left",
-            "s": {
-              "alignment": {
-                "horizontal": "left"
-              }
-            },
-            "t": "s"
-          },
-          "B7": {
-            "v": "center",
-            "s": {
-              "alignment": {
-                "horizontal": "center"
-              }
-            },
-            "t": "s"
-          },
-          "C7": {
-            "v": "right",
-            "s": {
-              "alignment": {
-                "horizontal": "right"
-              }
-            },
-            "t": "s"
-          },
-          "A8": {
-            "v": "vertical",
-            "s": {
-              "alignment": {
-                "vertical": "top"
-              }
-            },
-            "t": "s"
-          },
-          "B8": {
-            "v": "vertical",
-            "s": {
-              "alignment": {
-                "vertical": "center"
-              }
-            },
-            "t": "s"
-          },
-          "C8": {
-            "v": "vertical",
-            "s": {
-              "alignment": {
-                "vertical": "bottom"
-              }
-            },
-            "t": "s"
-          },
-          "A9": {
-            "v": "indent",
-            "s": {
-              "alignment": {
-                "indent": "1"
-              }
-            },
-            "t": "s"
-          },
-          "B9": {
-            "v": "indent",
-            "s": {
-              "alignment": {
-                "indent": "2"
-              }
-            },
-            "t": "s"
-          },
-          "C9": {
-            "v": "indent",
-            "s": {
-              "alignment": {
-                "indent": "3"
-              }
-            },
-            "t": "s"
-          },
-          "A10": {
-            "v": "In publishing and graphic design, lorem ipsum is a filler text commonly used to demonstrate the graphic elements of a document or visual presentation. ",
-            "s": {
-              "alignment": {
-                "wrapText": 1,
-                "horizontal": "right",
-                "vertical": "center",
-                "indent": 1
-              }
-            },
-            "t": "s"
-          },
-          "A11": {
-            "v": 41684.35264774306,
-            "s": {
-              "numFmt": "m/d/yy"
-            },
-            "t": "n"
-          },
-          "B11": {
-            "v": 41684.35264774306,
-            "s": {
-              "numFmt": "d-mmm-yy"
-            },
-            "t": "n"
-          },
-          "C11": {
-            "v": 41684.35264774306,
-            "s": {
-              "numFmt": "h:mm:ss AM/PM"
-            },
-            "t": "n"
-          },
-          "D11": {
-            "v": 42084.99137416667,
-            "s": {
-              "numFmt": "m/d/yy"
-            },
-            "t": "n"
-          },
-          "E11": {
-            "v": 42065.02247239584,
-            "s": {
-              "numFmt": "m/d/yy"
-            },
-            "t": "n"
-          },
-          "F11": {
-            "v": 42084.99137416667,
-            "s": {
-              "numFmt": "m/d/yy h:mm:ss AM/PM"
-            },
-            "t": "n"
-          },
-          "A12": {
-            "v": "Apple",
-            "s": {
-              "border": {
-                "top": {
-                  "style": "thin"
-                },
-                "left": {
-                  "style": "thin"
-                },
-                "right": {
-                  "style": "thin"
-                },
-                "bottom": {
-                  "style": "thin"
-                }
-              }
-            },
-            "t": "s"
-          },
-          "C12": {
-            "v": "Apple",
-            "s": {
-              "border": {
-                "diagonalUp": 1,
-                "diagonalDown": 1,
-                "top": {
-                  "style": "dashed",
-                  "color": {
-                    "auto": 1
-                  }
-                },
-                "right": {
-                  "style": "medium",
-                  "color": {
-                    "theme": "5"
-                  }
-                },
-                "bottom": {
-                  "style": "hair",
-                  "color": {
-                    "theme": 5,
-                    "tint": "-0.3"
-                  }
-                },
-                "left": {
-                  "style": "thin",
-                  "color": {
-                    "rgb": "FFFFAA00"
-                  }
-                },
-                "diagonal": {
-                  "style": "dotted",
-                  "color": {
-                    "auto": 1
-                  }
-                }
-              }
-            },
-            "t": "s"
-          },
-          "E12": {
-            "v": "Pear",
-            "s": {
-              "border": {
-                "diagonalUp": 1,
-                "diagonalDown": 1,
-                "top": {
-                  "style": "dashed",
-                  "color": {
-                    "auto": 1
-                  }
-                },
-                "right": {
-                  "style": "dotted",
-                  "color": {
-                    "theme": "5"
-                  }
-                },
-                "bottom": {
-                  "style": "mediumDashed",
-                  "color": {
-                    "theme": 5,
-                    "tint": "-0.3"
-                  }
-                },
-                "left": {
-                  "style": "double",
-                  "color": {
-                    "rgb": "FFFFAA00"
-                  }
-                },
-                "diagonal": {
-                  "style": "hair",
-                  "color": {
-                    "auto": 1
-                  }
-                }
-              }
-            },
-            "t": "s"
-          },
-          "A13": {
-            "v": "Up 90",
-            "s": {
-              "alignment": {
-                "textRotation": 90
-              }
-            },
-            "t": "s"
-          },
-          "B13": {
-            "v": "Up 45",
-            "s": {
-              "alignment": {
-                "textRotation": 45
-              }
-            },
-            "t": "s"
-          },
-          "C13": {
-            "v": "Horizontal",
-            "s": {
-              "alignment": {
-                "textRotation": 0
-              }
-            },
-            "t": "s"
-          },
-          "D13": {
-            "v": "Down 45",
-            "s": {
-              "alignment": {
-                "textRotation": 135
-              }
-            },
-            "t": "s"
-          },
-          "E13": {
-            "v": "Down 90",
-            "s": {
-              "alignment": {
-                "textRotation": 180
-              }
-            },
-            "t": "s"
-          },
-          "F13": {
-            "v": "Vertical",
-            "s": {
-              "alignment": {
-                "textRotation": 255
-              }
-            },
-            "t": "s"
-          },
-          "A14": {
-            "v": "Font color test",
-            "s": {
-              "font": {
-                "color": {
-                  "rgb": "FFC6EFCE"
-                }
-              }
-            },
-            "t": "s"
-          },
-          "!ref": "A1:F14"
-        }
-      }
-    }
-  });
-
-
-  it('can write to a file and read the file back', function () {
-    XLSX.writeFile(workbook, '/tmp/wb.xlsx',  { defaultCellStyle: defaultCellStyle });
-    var wb1 = XLSX.readFile('/tmp/wb.xlsx', {type: "xlsx", cellStyles: true, cellNF: true, WTF:true});
-    assert(basicallyEquals(workbook.Sheets.Main,wb1.Sheets.Main));
-  });
-
-  it('can write to a buffer and read the file back', function () {
-    var wb2 = XLSX.read(XLSX.write(workbook, {type:"buffer", bookType: 'xlsx'}), {cellStyles: true, cellNF: true})
-    XLSX.writeFile(wb2, '/tmp/wb2.xlsx',  { defaultCellStyle: defaultCellStyle });
-    assert(basicallyEquals(workbook.Sheets.Main,wb2.Sheets.Main));
-  });
-
-});
\ No newline at end of file