Merge pull request #556 from u5surf/issues-555

Skip read lines from empty file

internal/reader/lines.go

@@ -35,6 +35,13 @@ func (l *Lines) Extract() ([]string, error) {
 	if err != nil {
 		return nil, err
 	}
+	stat, err := f.Stat()
+	if err != nil {
+		return nil, err
+	}
+	if stat.Size() == 0 {
+		return []string{}, nil
+	}
 	defer func() {
 		_ = f.Close()
 	}()

internal/reader/lines_test.go

@@ -103,6 +103,13 @@ func TestReadLinesFromFile(t *testing.T) {
 			expected:   "Morbi vitae nulla in dui lobortis consectetur. Integer nec tempus felis. Ut quis suscipit risus. Donec lobortis consequat nunc, in efficitur mi maximus ac. Sed id felis posuere, aliquam purus eget, faucibus augue.",
 			wantError:  false,
 		},
+		{
+			name:       "extract lines from file",
+			fileName:   "testdata/empty.txt",
+			lineNumber: 0,
+			expected:   "",
+			wantError:  false,
+		},
 		{
 			name:       "extract lines from file",
 			fileName:   "testdata/noop.txt",