test/clangd_tests.vim | 31 +++++++++++++++++++++++++++++++

diff --git a/test/clangd_tests.vim b/test/clangd_tests.vim
index 07fd96026c4d443dd8d4916f45a336c51b22040f..a46342f34e3fad9bc7cd07ce3d7717291b4255e3 100644
--- a/test/clangd_tests.vim
+++ b/test/clangd_tests.vim
@@ -404,6 +404,37 @@     assert_match('Initializer element is not ', output[0])
   endfor
   g:LspOptionsSet({showDiagInPopup: true})
 
+  # Check for exact diag ":LspDiagCurrent!"
+  g:LspOptionsSet({showDiagInPopup: false})
+  for i in range(1, 4)
+    cursor(1, i)
+    output = execute('LspDiagCurrent!')->split('\n')
+    assert_match('No diagnostic messages found for current line', output[0])
+  endfor
+
+  cursor(1, 5)
+  output = execute('LspDiagCurrent!')->split('\n')
+  assert_match('Incompatible pointer to integer', output[0])
+
+  for i in range(6, 8)
+    cursor(1, i)
+    output = execute('LspDiagCurrent!')->split('\n')
+    assert_match('No diagnostic messages found for current line', output[0])
+  endfor
+
+  for i in range(9, 11)
+    cursor(1, i)
+    output = execute('LspDiagCurrent!')->split('\n')
+    assert_match('Initializer element is not ', output[0])
+  endfor
+  for i in range(12, 12)
+    cursor(1, i)
+    output = execute('LspDiagCurrent!')->split('\n')
+    assert_match('No diagnostic messages found for current line', output[0])
+  endfor
+
+  g:LspOptionsSet({showDiagInPopup: true})
+
   bw!
 enddef