fix test script and address comment

Signed-off-by: tabokie <xy.tao@outlook.com>

components/tikv_alloc/src/lib.rs

@@ -134,6 +134,9 @@ mod runner {
     extern crate test;
     use test::*;
 
+    /// Test cases with name <name>_where_<ENV_VAR_NAME> will be checked for
+    /// whether the environment variable is set. Cases are ignored if its
+    /// depending variable is unset.
     pub fn run_env_conditional_tests(cases: &[&TestDescAndFn]) {
         let cases: Vec<_> = cases
             .iter()

scripts/test-all

@@ -13,17 +13,13 @@ if [[ -z $MAKEFILE_RUN ]] ; then
 fi
 
 ./scripts/test "$@" -- --nocapture
-# The special Linux case below is testing the mem-profiling
-# features in tikv_alloc, which are marked #[ignore] since
-# they require special compile-time and run-time setup
-# Fortunately rebuilding with the mem-profiling feature will only
-# rebuild starting at jemalloc-sys.
+# Re-run tests that requires specific environment variables.
 if [[ "$(uname)" == "Linux" ]]; then
     export MALLOC_CONF=prof:true
-    ./scripts/test "$@" -- --nocapture
+    ./scripts/test "$@" -- where_MALLOC_CONF --nocapture
 fi
 
 if [[ "$(uname)" = "Linux" ]]; then
     EXTRA_CARGO_ARGS="" ./scripts/test --message-format=json-render-diagnostics -q --no-run -- --nocapture |
-            python scripts/check-bins.py --features "${TIKV_ENABLE_FEATURES}" --check-tests
+           python scripts/check-bins.py --features "${TIKV_ENABLE_FEATURES}" --check-tests
 fi