test: ctrl_c_spec

- Improve test reliability by only checking for a line with the string
  we are interested in ("Interrupt").
- Try to avoid OOM by loading an existing big file instead of looping to
  create one.

test/functional/ex_cmds/ctrl_c_spec.lua

@@ -0,0 +1,56 @@
+local helpers = require('test.functional.helpers')(after_each)
+local Screen = require('test.functional.ui.screen')
+local clear, feed, source = helpers.clear, helpers.feed, helpers.source
+local execute = helpers.execute
+
+if helpers.pending_win32(pending) then return end
+
+describe("CTRL-C (mapped)", function()
+  before_each(function()
+    clear()
+  end)
+
+  it("interrupts :global", function()
+    source([[
+      set nomore nohlsearch undolevels=-1
+      nnoremap <C-C> <NOP>
+    ]])
+
+    execute("silent edit! test/functional/fixtures/bigfile.txt")
+    local screen = Screen.new(52, 6)
+    screen:attach()
+    screen:set_default_attr_ids({
+      [0] = {foreground = Screen.colors.White,
+             background = Screen.colors.Red},
+      [1] = {bold = true,
+             foreground = Screen.colors.SeaGreen}
+    })
+
+    screen:expect([[
+      ^0000;<control>;Cc;0;BN;;;;;N;NULL;;;;               |
+      0001;<control>;Cc;0;BN;;;;;N;START OF HEADING;;;;   |
+      0002;<control>;Cc;0;BN;;;;;N;START OF TEXT;;;;      |
+      0003;<control>;Cc;0;BN;;;;;N;END OF TEXT;;;;        |
+      0004;<control>;Cc;0;BN;;;;;N;END OF TRANSMISSION;;;;|
+                                                          |
+    ]])
+
+    local function test_ctrl_c(ms)
+      feed(":global/^/p<CR>")
+      helpers.sleep(ms)
+      feed("<C-C>")
+      screen:expect([[Interrupt]], nil, nil, nil, true)
+    end
+
+    -- The test is time-sensitive. Try different sleep values.
+    local ms_values = {1, 10, 100}
+    for i, ms in ipairs(ms_values) do
+      if i < #ms_values then
+        local status, _ = pcall(test_ctrl_c, ms)
+        if status then break end
+      else  -- Call the last attempt directly.
+        test_ctrl_c(ms)
+      end
+    end
+  end)
+end)

test/functional/ex_cmds/global_spec.lua

@@ -1,74 +0,0 @@
-local helpers = require('test.functional.helpers')(after_each)
-local Screen = require('test.functional.ui.screen')
-local clear, feed, source = helpers.clear, helpers.feed, helpers.source
-
-if helpers.pending_win32(pending) then return end
-
-describe(':global', function()
-  before_each(function()
-    clear()
-  end)
-
-  it('is interrupted by mapped CTRL-C', function()
-    if os.getenv("TRAVIS") and os.getenv("CLANG_SANITIZER") == "ASAN_UBSAN" then
-      -- XXX: ASAN_UBSAN is too slow to react to the CTRL-C.
-      pending("", function() end)
-      return
-    end
-
-    source([[
-      set nomore
-      set undolevels=-1
-      nnoremap <C-C> <NOP>
-      for i in range(0, 99999)
-        put ='XXX'
-      endfor
-      put ='ZZZ'
-      1
-      .delete
-    ]])
-
-    local screen = Screen.new(52, 6)
-    screen:attach()
-    screen:set_default_attr_ids({
-      [0] = {foreground = Screen.colors.White,
-             background = Screen.colors.Red},
-      [1] = {bold = true,
-             foreground = Screen.colors.SeaGreen}
-    })
-
-    screen:expect([[
-      ^XXX                                                 |
-      XXX                                                 |
-      XXX                                                 |
-      XXX                                                 |
-      XXX                                                 |
-                                                          |
-    ]])
-
-    local function test_ctrl_c(ms)
-      feed(":global/^/p<CR>")
-      helpers.sleep(ms)
-      feed("<C-C>")
-      screen:expect([[
-        XXX                                                 |
-        XXX                                                 |
-        XXX                                                 |
-        XXX                                                 |
-        {0:Interrupted}                                         |
-        Interrupt: {1:Press ENTER or type command to continue}^  |
-      ]])
-    end
-
-    -- The test is time-sensitive. Try with different sleep values.
-    local ms_values = {10, 50, 100}
-    for i, ms in ipairs(ms_values) do
-      if i < #ms_values then
-        local status, _ = pcall(test_ctrl_c, ms)
-        if status then break end
-      else  -- Call the last attempt directly.
-        test_ctrl_c(ms)
-      end
-    end
-  end)
-end)