Add tests for `select` command warnings.

Makefile

@@ -716,6 +716,7 @@ test: $(TARGETS) $(EXTRA_TARGETS)
 	+cd tests/memories && bash run-test.sh $(ABCOPT) $(SEEDOPT)
 	+cd tests/bram && bash run-test.sh $(SEEDOPT)
 	+cd tests/various && bash run-test.sh
+	+cd tests/select && bash run-test.sh
 	+cd tests/sat && bash run-test.sh
 	+cd tests/svinterfaces && bash run-test.sh $(SEEDOPT)
 	+cd tests/svtypes && bash run-test.sh $(SEEDOPT)

tests/select/no_warn_prefixed_empty_select_arg.ys

@@ -0,0 +1,3 @@
+logger -expect-no-warnings
+select n:foo/bar*
+select t:$assert

tests/select/run-test.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+set -e
+for x in *.ys; do
+  echo "Running $x.."
+  ../../yosys -ql ${x%.ys}.log $x
+done

tests/select/warn_empty_select_arg.ys

@@ -0,0 +1,3 @@
+logger -expect warning "did not match any module." 1
+logger -expect warning "did not match any object." 1
+select foo/bar