test: restrict environment variables (#4)

README.md

@@ -6,7 +6,7 @@ Bazel implementations to test a build error.
 
 There's a situation where a developer wants to test if particular code doesn't compile. However, when using ordinary testing rules, such as `cc_test`, `bazel test` results in an error if the test code doesn't compile.
 
-`rules_build_error` is the repository to address such a problem. It provides some implementations to test the compilation error for each programming language. When the code written in a particular **does** compile, `bazel build` should fail for the associated target.
+`rules_build_error` is the repository to address such a problem. It provides some implementations to test the compilation error for each programming language. When the code written in a particular programming language **does** compile, `bazel build` should fail for the associated target.
 
 ## Usage
 

execute_tests.sh

@@ -4,6 +4,16 @@
 
 set -euo pipefail
 
+# Bazel executable with some arguments
+BAZEL_EXECUTABLE=(
+    "env"
+    "-i"
+    BAZEL_DO_NOT_DETECT_CPP_TOOLCHAIN=1
+    "HOME=${HOME}"
+    "PATH=${PATH}"
+    bazelisk
+)
+
 check_bazel_build_error() {
     # Check bazel build error for a particular target
     #
@@ -12,22 +22,22 @@ check_bazel_build_error() {
     local label
     label=$1
 
-    # Before executing `bazelisk build`, check if the target exists with `bazelisk query`
-    bazelisk query "${label}"
+    # Before executing `bazel build`, check if the target exists with `bazel query`
+    "${BAZEL_EXECUTABLE[@]}" query "${label}"
 
     # Check build error
-    if bazelisk build "${label}"; then
+    if "${BAZEL_EXECUTABLE[@]}" build "${label}"; then
         echo "Target '${label}' must fail to build, but succeeded" >&2
         exit 1
     else
         echo "OK! It has failed as intended."
     fi
 }
 
-echo "Executing the test cases which should pass straightforward 'bazelisk test'"
-bazelisk test //...
+echo "Executing the test cases which should succeed in straightforward 'bazel test'"
+"${BAZEL_EXECUTABLE[@]}" test //...
 
-echo "Executing the test cases which should fail at 'bazelisk build'"
+echo "Executing the test cases which should fail at 'bazel build'"
 check_bazel_build_error //tests/cc/cpp_successful_build:plain
 check_bazel_build_error //tests/cc/cpp_successful_build:with_basic_regex_matcher
 check_bazel_build_error //tests/cc/cpp_successful_build:with_extended_regex_matcher