add 'info' mode for integration tests (#318)

Motivation:

Sometimes it's useful if the integration tests can output something that
isn't always useful. `-v` for verbose is way too verbose so this adds a
`-i` flag to the integration tests that lets 'info' messages through.

Modifications:

- add `-i` flags to integration tests
- make use of it in the integration counter tests

Result:

if we enable `-i` in CI, then we can constantly monitor the number of
allocations we do even if we don't fail the tests.

IntegrationTests/run-single-test.sh

@@ -22,6 +22,7 @@ set -o pipefail
 test="$1"
 tmp="$2"
 root="$3"
+g_show_info="$4"
 here="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
 source "$here/test_functions.sh"

IntegrationTests/run-tests.sh

@@ -61,7 +61,8 @@ shift $plugin_opts_ind
 
 filter="."
 verbose=false
-while getopts "f:v" opt; do
+show_info=false
+while getopts "f:vi" opt; do
     case $opt in
         f)
             filter="$OPTARG"
@@ -69,6 +70,9 @@ while getopts "f:v" opt; do
         v)
             verbose=true
             ;;
+        i)
+            show_info=true
+            ;;
         \?)
             usage
             exit 1
@@ -104,7 +108,7 @@ for f in tests_*; do
         test_tmp=$(mktemp -d "$tmp/test.tmp_XXXXXX")
         plugins_do test_begin "$t" "$f"
         start=$(date +%s)
-        if run_test "$here/run-single-test.sh" "$here/$f/$t" "$test_tmp" "$here/.."; then
+        if run_test "$here/run-single-test.sh" "$here/$f/$t" "$test_tmp" "$here/.." "$show_info"; then
             plugins_do test_ok "$(time_diff_to_now $start)"
             suite_ok=$((suite_ok+1))
             if $verbose; then

IntegrationTests/test_functions.sh

@@ -61,6 +61,18 @@ function assert_greater_than_or_equal() {
     fi
 }
 
+g_has_previously_infoed=false
+
+function info() {
+    if $g_show_info; then
+        if ! $g_has_previously_infoed; then
+            echo >&3 || true # echo an extra newline so it looks better
+            g_has_previously_infoed=true
+        fi
+        echo >&3 "info: $*" || true
+    fi
+}
+
 function warn() {
     echo >&4 "warning: $*"
 }

IntegrationTests/tests_04_performance/test_01_allocation_counts_for_http1.sh

@@ -64,6 +64,9 @@ for test in 1000_reqs_1_conn 1_reqs_1000_conn; do
     not_freed_allocations=$(grep "^$test.remaining_allocations:" "$tmp/output" | cut -d: -f2 | sed 's/ //g')
     max_allowed_env_name="MAX_ALLOCS_ALLOWED_$test"
 
+    info "$test: allocations not freed: $not_freed_allocations"
+    info "$test: total number of mallocs: $total_allocations"
+
     assert_less_than "$not_freed_allocations" 5     # allow some slack
     assert_greater_than "$not_freed_allocations" -5 # allow some slack
     assert_greater_than "$total_allocations" 1000