GoogleTest

Refactor control flow functions using dollar sign #468

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Run time

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Job	Run time
test (gcc, g++, Release)	5m 29s
test (gcc, g++, Debug)	5m 22s
test (clang, clang++, Release)	6m 43s
test (clang, clang++, Debug)	5m 54s
	23m 28s