#398 fix didChange at eof

Author: sumneko

script/files.lua

@@ -538,7 +538,7 @@ function m.offset(uri, position, isFinish)
     local start  = guide.lineRange(lines, row)
     local offset
     if start <= 0 or start > #text then
-        offset = #text + 1
+        offset = math.maxinteger
     else
         offset = utf8.offset(text, position.character + 1, start) or #text
     end
@@ -572,7 +572,7 @@ function m.offsetOfWord(uri, position)
     local start  = guide.lineRange(lines, row)
     local offset
     if start <= 0 or start > #text then
-        offset = #text + 1
+        offset = math.maxinteger
     else
         offset = utf8.offset(text, position.character + 1, start) or #text
     end

test.lua

@@ -61,6 +61,7 @@ local function main()
     --config.config.intelliSense.searchDepth = 5
     loadDocMetas()
 
+    test 'basic'
     test 'references'
     test 'definition'
     test 'type_inference'

test/basic/init.lua

@@ -0,0 +1,116 @@
+local files = require 'files'
+
+local text = [[
+
+
+function Test(self)
+
+end
+]]
+files.setText('', text)
+
+local changes = {
+    [1] = {
+        range = {
+            ["end"] = {
+                character = 0,
+                line = 5,
+            },
+            start = {
+                character = 0,
+                line = 5,
+            },
+        },
+        rangeLength = 0,
+        text = "\
+",
+    },
+    [2] = {
+        range = {
+            ["end"] = {
+                character = 0,
+                line = 6,
+            },
+            start = {
+                character = 0,
+                line = 6,
+            },
+        },
+        rangeLength = 0,
+        text = "a",
+    },
+    [3] = {
+        range = {
+            ["end"] = {
+                character = 1,
+                line = 6,
+            },
+            start = {
+                character = 1,
+                line = 6,
+            },
+        },
+        rangeLength = 0,
+        text = "s",
+    },
+    [4] = {
+        range = {
+            ["end"] = {
+                character = 2,
+                line = 6,
+            },
+            start = {
+                character = 2,
+                line = 6,
+            },
+        },
+        rangeLength = 0,
+        text = "s",
+    },
+    [5] = {
+        range = {
+            ["end"] = {
+                character = 3,
+                line = 6,
+            },
+            start = {
+                character = 3,
+                line = 6,
+            },
+        },
+        rangeLength = 0,
+        text = "e",
+    },
+    [6] = {
+        range = {
+            ["end"] = {
+                character = 4,
+                line = 6,
+            },
+            start = {
+                character = 4,
+                line = 6,
+            },
+        },
+        rangeLength = 0,
+        text = "r",
+    },
+}
+
+for _, change in ipairs(changes) do
+    if change.range then
+        local start, finish = files.unrange('', change.range)
+        text = text:sub(1, start - 1) .. change.text .. text:sub(finish)
+    else
+        text = change.text
+    end
+end
+
+assert(text == [[
+
+
+function Test(self)
+
+end
+
+asser]])