1 files changed, 58 insertions, 0 deletions
diff --git a/testsuite/synth/if03/tb_if01.vhdl b/testsuite/synth/if03/tb_if01.vhdl
new file mode 100644
index 000000000..c81f109a7
--- /dev/null
+++ b/testsuite/synth/if03/tb_if01.vhdl
@@ -0,0 +1,58 @@
+entity tb_if01 is
+end tb_if01;
+
+library ieee;
+use ieee.std_logic_1164.all;
+
+architecture behav of tb_if01 is
+  signal a    : std_logic;
+  signal b    : std_logic;
+  signal en1  : std_logic;
+  signal sel1 : std_logic;
+  signal clk  : std_logic;
+  signal s1   : std_logic;
+  signal s2   : std_logic;
+begin
+  dut: entity work.if01
+    port map (
+      a    => a,
+      b    => b,
+      en1  => en1,
+      sel1 => sel1,
+      clk  => clk,
+      s1   => s1,
+      s2   => s2);
+
+  process
+    procedure pulse is
+    begin
+      clk <= '0';
+      wait for 1 ns;
+      clk <= '1';
+      wait for 1 ns;
+    end pulse;
+  begin
+    en1 <= '1';
+    b <= '1';
+    a <= '0';
+    pulse;
+    assert s1 = '0' severity failure;
+    assert s2 = '1' severity failure;
+
+    en1 <= '1';
+    b <= '0';
+    a <= '1';
+    pulse;
+    assert s1 = '1' severity failure;
+    assert s2 = '0' severity failure;
+
+    en1 <= '0';
+    b <= 'X';
+    a <= 'X';
+    pulse;
+    assert s1 = '1' severity failure;
+    assert s2 = '0' severity failure;
+
+    wait;
+  end process;
+end behav;