testsuite/synth: add testcase for #1025

1 files changed, 39 insertions, 0 deletions

diff --git a/testsuite/synth/issue1025/tb_ent.vhdl b/testsuite/synth/issue1025/tb_ent.vhdl
new file mode 100644
index 000000000..30ead5166
--- /dev/null
+++ b/testsuite/synth/issue1025/tb_ent.vhdl
@@ -0,0 +1,39 @@
+entity tb_ent is
+end tb_ent;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+architecture behav of tb_ent is
+  signal clk : std_logic;
+  signal counter : natural;
+  signal rst : std_logic;
+begin
+  dut: entity work.ent
+    port map (
+      rst => rst,
+      clk => clk,
+      counter => counter);
+
+  process
+    procedure pulse is
+    begin
+      clk <= '0';
+      wait for 1 ns;
+      clk <= '1';
+      wait for 1 ns;
+    end pulse;
+  begin
+    rst <= '1';
+    pulse;
+    assert counter = 0 severity failure;
+    rst <= '0';
+    pulse;
+    assert counter = 1 severity failure;
+    pulse;
+    assert counter = 2 severity failure;
+    pulse;
+    assert counter = 3 severity failure;
+    wait;
+  end process;
+end behav;