Add utils MustGetFileAsString and GetNumberOfLeftSpaces.

editorconfig/utils.go

@@ -2,9 +2,11 @@ package editorconfig
 
 import (
 	"fmt"
+	"io/ioutil"
 	"os"
 	"path/filepath"
 	"regexp"
+	"strings"
 )
 
 var filePathSeparatorRegex = regexp.QuoteMeta(string(filepath.Separator))
@@ -54,3 +56,16 @@ func GetErrorWithLineBreaksVisible(s string) string {
 	s = crlfRegexp.ReplaceAllString(s, `\r\n`)
 	return s
 }
+
+func MustGetFileAsString(path string) string {
+	inBytes, err := ioutil.ReadFile(path)
+	if err != nil {
+		ExitBecauseOfInternalError("Could not read file: " + path)
+	}
+
+	return string(inBytes)
+}
+
+func GetNumberOfLeftSpaces(s string) int {
+	return len(s) - len(strings.TrimLeft(s, " "))
+}

editorconfig/utils_test.go

@@ -2,6 +2,7 @@ package editorconfig
 
 import (
 	"reflect"
+	"strconv"
 	"strings"
 	"testing"
 )
@@ -25,3 +26,18 @@ func TestSplitIntoLines(t *testing.T) {
 		t.Error("Did not split string into lines correctly, got lines: " + strings.Join(result, ", "))
 	}
 }
+
+func TestMustGetFileAsString(t *testing.T) {
+	license := MustGetFileAsString("../LICENSE")
+	if !strings.Contains(license, "MIT License") || !strings.Contains(license, "THE SOFTWARE IS PROVIDED \"AS IS\"") {
+		t.Error("Could not read file")
+	}
+}
+
+func TestGetNumberOfLeftSpaces(t *testing.T) {
+	for i := 0; i < 20; i++ {
+		if GetNumberOfLeftSpaces(strings.Repeat(" ", i)) != i {
+			t.Error("Wrong number of spaces returned when string starts with " + strconv.Itoa(i) + " spaces")
+		}
+	}
+}