diag `missing-return`

1 files changed, 128 insertions, 1 deletions

diff --git a/test/diagnostics/common.lua b/test/diagnostics/common.lua
index 2d56103b..86acbe0c 100644
--- a/test/diagnostics/common.lua
+++ b/test/diagnostics/common.lua
@@ -1759,7 +1759,6 @@ function F()
 end
 ]]
 
-do return end
 TEST [[
 ---@return number
 function F()
@@ -1767,4 +1766,132 @@ function F()
 end
 ]]
 
+TEST [[
+local A
+---@return number
+function F()
+    if A then
+        return 1
+    end<!!>
+end
+]]
+
+TEST [[
+local A, B
+---@return number
+function F()
+    if A then
+        return 1
+    elseif B then
+        return 2
+    end<!!>
+end
+]]
+
+TEST [[
+local A, B
+---@return number
+function F()
+    if A then
+        return 1
+    elseif B then
+        return 2
+    else
+        return 3
+    end
+end
+]]
+
+TEST [[
+local A, B
+---@return number
+function F()
+    if A then
+    elseif B then
+        return 2
+    else
+        return 3
+    end<!!>
+end
+]]
+
+TEST [[
+---@return any
+function F()
+    X = 1
+end
+]]
+
+TEST [[
+---@return any, number
+function F()
+    X = 1<!!>
+end
+]]
+
+TEST [[
+---@return number, any
+function F()
+    X = 1<!!>
+end
+]]
+
+TEST [[
+---@return any, any
+function F()
+    X = 1<!!>
+end
+]]
+
+TEST [[
+local A
+---@return number
+function F()
+    for _ = 1, 10 do
+        if A then
+            return 1
+        end
+    end
+    error('should not be here')
+end
+]]
+
+TEST [[
+local A
+---@return number
+function F()
+    while true do
+        if A then
+            return 1
+        end
+    end
+end
+]]
+
+TEST [[
+local A
+---@return number
+function F()
+    while A do
+        if A then
+            return 1
+        end
+    end<!!>
+end
+]]
+
+TEST [[
+local A
+---@return number
+function F()
+    while A do
+        if A then
+            return 1
+        else
+            return 2
+        end
+    end
+end
+]]
+
 util.arrayRemove(disables, 'redundant-return')