From 6760e9fb9f59f297c8385c85523850dc46abb1cd Mon Sep 17 00:00:00 2001
From: io-monad <iride.monad@gmail.com>
Date: Sat, 26 Mar 2016 10:50:29 +0900
Subject: [PATCH] Fix bug toIndex({ line: 0, col: 0}) failed

---
 lib/line-column.js       |  2 +-
 test/line-column-test.js | 12 ++++++++++++
 2 files changed, 13 insertions(+), 1 deletion(-)

diff --git a/lib/line-column.js b/lib/line-column.js
index bdb32ff..2d9375b 100644
--- a/lib/line-column.js
+++ b/lib/line-column.js
@@ -76,7 +76,7 @@ LineColumnFinder.prototype.toIndex = function (line, column) {
       return this.toIndex(line[0], line[1]);
     }
     if (isObject(line) && "line" in line && ("col" in line || "column" in line)) {
-      return this.toIndex(line.line, line.col || line.column);
+      return this.toIndex(line.line, ("col" in line ? line.col : line.column));
     }
     return -1;
   }
diff --git a/test/line-column-test.js b/test/line-column-test.js
index 1b02665..5e98d8d 100644
--- a/test/line-column-test.js
+++ b/test/line-column-test.js
@@ -174,6 +174,9 @@ describe("LineColumnFinder", function () {
       it("returns an index for the last line", function () {
         assert(lineColumn.toIndex(4, 7) === 43);
       });
+      it("returns an index for the first character", function () {
+        assert(lineColumn.toIndex(0, 0) === 0);
+      });
       it("returns an index for the last character", function () {
         assert(lineColumn.toIndex(4, 12) === 48);
       });
@@ -190,6 +193,15 @@ describe("LineColumnFinder", function () {
       it("accepts an Array of [ line, col ]", function () {
         assert(lineColumn.toIndex([1, 7]) === 15);
       });
+      it("returns an index for { line: 0, col: 0 }", function () {
+        assert(lineColumn.toIndex({ line: 0, col: 0 }) === 0);
+      });
+      it("returns an index for { line: 0, column: 0 }", function () {
+        assert(lineColumn.toIndex({ line: 0, column: 0 }) === 0);
+      });
+      it("returns an index for [ 0, 0 ]", function () {
+        assert(lineColumn.toIndex([0, 0]) === 0);
+      });
 
       it("returns -1 for line < 0", function () {
         assert(lineColumn.toIndex(-1, 3) === -1);