logger: fix unmatched expected warnings and errors

- Prevent unmatched expected error patterns from self-matching
- Prevent infinite recursion on unmatched expected warnings
- Always print the error message for unmatched error patterns
- Add test coverage for all unmatched message types
- Add test coverage for excess matched logs and warnings

tests/various/logger_fail.sh

@@ -0,0 +1,42 @@
+#!/bin/bash
+
+fail() {
+	echo "$1" >&2
+	exit 1
+}
+
+runTest() {
+	desc="$1"
+	want="$2"
+	shift 2
+	echo "running '$desc' with args $@"
+	output=`../../yosys -q "$@" 2>&1`
+	if [ $? -ne 1 ]; then
+		fail "exit code for '$desc' was not 1"
+	fi
+	if [ "$output" != "$want" ]; then
+		fail "output for '$desc' did not match"
+	fi
+}
+
+unmet() {
+	kind=$1
+	runTest "unmet $kind" \
+		"ERROR: Expected $kind pattern 'foobar' not found !" \
+		-p "logger -expect $kind \"foobar\" 1"
+}
+
+unmet log
+unmet warning
+unmet error
+
+runTest "too many logs" \
+	"ERROR: Expected log pattern 'statistics' found 2 time(s), instead of 1 time(s) !" \
+	-p "logger -expect log \"statistics\" 1" -p stat -p stat
+
+runTest "too many warnings" \
+	"Warning: Found log message matching -W regex:
+Printing statistics.
+ERROR: Expected warning pattern 'statistics' found 2 time(s), instead of 1 time(s) !" \
+	-p "logger -warn \"Printing statistics\"" \
+	-p "logger -expect warning \"statistics\" 1" -p stat -p stat