Expand $TEST_UNDECLARED_OUTPUTS_DIR when running test from bazel #553
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Currently when running bluepill from bazel,
$TEST_UNDECLARED_OUTPUTS_DIR
is not accessible from test runtime by passing with--test_env
Supporting it by expanding the variable in the shell script and passing it to the test plan.
So we can run something like
bazel test Taget --config Debug --test_env SCREENSHOT_DIR=\$TEST_UNDECLARED_OUTPUTS_DIR/screenshots
. Then the screenshot can be saved to the undeclared outputs dir and be packaged to the finalbazel-testlog
folderref: https://bazel.build/reference/test-encyclopedia#initial-conditions