fix test coverage check

.github/workflows/wasp-test-benchspy.yml

@@ -25,9 +25,3 @@ jobs:
         if: steps.changes.outputs.src == 'true'
         run: |-
           nix develop -c make test_benchspy_race
-          coverage=$(go tool cover -func=cover.out | grep total | awk '{print substr($3, 1, length($3)-1)}')
-          if (( $(echo "$coverage < 85" | bc -l) )); then
-            echo "Test coverage $coverage% is below minimum 85%"
-            exit 1
-          fi
-          echo "Test coverage: $coverage%"

wasp/Makefile

@@ -8,7 +8,7 @@ test_race:
 
 .PHONY: test_benchspy_race
 test_benchspy_race:
-	go test -v -race -coverprofile cover.out -count 1 `go list ./... | grep -v examples | grep benchspy` -run TestBenchSpy
+	@./scripts/run_benchspy_tests.sh
 
 .PHONY: test_bench
 test_bench:

wasp/scripts/run_benchspy_tests.sh

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+go test -v -race -coverprofile cover.out -count 1 `go list ./... | grep -v examples | grep benchspy` -run TestBenchSpy
+coverage=$(go tool cover -func=cover.out | grep total | awk '{print substr($3, 1, length($3)-1)}')
+if [ -z "$coverage" ]; then
+    echo "Error: Could not determine test coverage";
+    exit 1
+fi
+
+if [[ $(echo "$coverage < 85" | bc -l) -eq 1 ]]; then
+    echo "Test coverage $coverage% is below minimum 85%"
+    exit 1
+fi
+echo "Test coverage: $coverage%"