Test added for branching instructions

tests/test_branching_stencils.py

@@ -0,0 +1,55 @@
+from copapy import variable
+from copapy.backend import Write, compile_to_dag, add_read_command
+import copapy as cp
+import subprocess
+from copapy import _binwrite
+import copapy.backend
+import pytest
+
+
+def run_command(command: list[str]) -> str:
+    result = subprocess.run(command, stdout=subprocess.PIPE, stderr=subprocess.PIPE, encoding='utf8', check=False)
+    assert result.returncode != 11, f"SIGSEGV (segmentation fault)\n -Error occurred: {result.stderr}\n -Output: {result.stdout}"
+    assert result.returncode == 0, f"\n -Error occurred: {result.stderr}\n -Output: {result.stdout}\n -Return code: {result.returncode}"
+    return result.stdout
+
+
+@pytest.mark.runner
+def test_compile():
+
+    test_vals = [0.0, -1.5, -2.0, -2.5, -3.0]
+
+    # Function with no passing-on-jump as last instruction:
+    ret_test = [r for v in test_vals for r in (cp.tan(variable(v)),)]
+
+    out = [Write(r) for r in ret_test]
+
+    il, variables = compile_to_dag(out, copapy.generic_sdb)
+
+    # run program command
+    il.write_com(_binwrite.Command.RUN_PROG)
+    #il.write_com(_binwrite.Command.DUMP_CODE)
+
+    for net in ret_test:
+        assert isinstance(net, copapy.backend.Net)
+        add_read_command(il, variables, net)
+
+    il.write_com(_binwrite.Command.END_COM)
+
+    print('* Data to runner:')
+    #il.print()
+
+    il.to_file('bin/test.copapy')
+
+    result = run_command(['bin/coparun', 'bin/test.copapy', 'bin/test.copapy.bin'])
+    print('* Output from runner:\n--')
+    print(result)
+    print('--')
+
+    assert 'Return value: 1' in result, 'No Return value: 1'
+    #assert 'END_COM' in result
+
+
+if __name__ == "__main__":
+    #test_example()
+    test_compile()