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-rw-r--r--src/nvim/testdir/test_assert.vim13
1 files changed, 12 insertions, 1 deletions
diff --git a/src/nvim/testdir/test_assert.vim b/src/nvim/testdir/test_assert.vim
index 4cc90eca7a..b4f7478807 100644
--- a/src/nvim/testdir/test_assert.vim
+++ b/src/nvim/testdir/test_assert.vim
@@ -28,7 +28,18 @@ func Test_assert_equalfile()
call writefile(['1234X89'], 'Xone')
call writefile(['1234Y89'], 'Xtwo')
call assert_equal(1, assert_equalfile('Xone', 'Xtwo'))
- call assert_match("difference at byte 4", v:errors[0])
+ call assert_match('difference at byte 4, line 1 after "1234X" vs "1234Y"', v:errors[0])
+ call remove(v:errors, 0)
+
+ call writefile([repeat('x', 234) .. 'X'], 'Xone')
+ call writefile([repeat('x', 234) .. 'Y'], 'Xtwo')
+ call assert_equal(1, assert_equalfile('Xone', 'Xtwo'))
+ let xes = repeat('x', 134)
+ call assert_match('difference at byte 234, line 1 after "' .. xes .. 'X" vs "' .. xes .. 'Y"', v:errors[0])
+ call remove(v:errors, 0)
+
+ call assert_equal(1, assert_equalfile('Xone', 'Xtwo', 'a message'))
+ call assert_match("a message: difference at byte 234, line 1 after", v:errors[0])
call remove(v:errors, 0)
call delete('Xone')