Makefile: do more caching in make test-only

.gitignore

@@ -24,3 +24,4 @@ scripts/easy_json/easy_json
 *.pprof
 *.prof
 node_modules/
+./test/.cached_binary_test_info.json

Makefile

@@ -92,10 +92,15 @@ test: generate lint
 
 .PHONY: test-only
 test-only:
-	go test ./examples/example-gateway/... | grep -v '\[no test files\]'
-	go test ./codegen/... | grep -v '\[no test files\]'
-	go test ./runtime/... | grep -v '\[no test files\]'
-	go test ./test/... | grep -v '\[no test files\]'
+	rm -f ./test/.cached_binary_test_info.json
+	go test ./test/health_test.go # preload the binary cache.
+	go test \
+		./examples/example-gateway/... \
+		./codegen/... \
+		./runtime/... \
+		./test/... | \
+		grep -v '\[no test files\]'
+	rm -f ./test/.cached_binary_test_info.json
 	echo "<coverage />" > ./coverage/cobertura-coverage.xml
 
 .PHONY: travis-coveralls

test/lib/test_gateway/test_gateway_cover.go

@@ -153,7 +153,7 @@ func createTestBinaryFile(
 	mainPath string,
 	config map[string]interface{},
 ) (*testBinaryInfo, error) {
-	if os.Getenv("COVER_ON") == "1" && cachedBinaryFile == nil {
+	if cachedBinaryFile == nil {
 		// Try to load cachedBinaryFile from disk
 		tryLoadCachedBinaryTestInfo(mainPath)
 	}
@@ -227,8 +227,6 @@ func createTestBinaryFile(
 		CoverProfileFile: coverProfileFile,
 		MainFile:         mainPath,
 	}
-	if os.Getenv("COVER_ON") == "1" {
-		tryWriteCachedBinaryTestInfo()
-	}
+	tryWriteCachedBinaryTestInfo()
 	return cachedBinaryFile, nil
 }