flaky test in dev environment

[amir-arad]

when running tests locally I sometimes get the following:

=== RUN   TestNewTruncatingFileWriterWithAutoTruncateTwice
--- FAIL: TestNewTruncatingFileWriterWithAutoTruncateTwice (0.10s)
    require.go:201: 
        	Error Trace:	truncating_file_writer_test.go:30
        	            				truncating_file_writer_test.go:83
        	Error:      	Not equal: 
        	            	expected: []byte{0x66, 0x6f, 0x6f, 0x66, 0x6f, 0x6f}
        	            	actual  : []byte{0x66, 0x6f, 0x6f}
        	            	
        	            	Diff:
        	            	--- Expected
        	            	+++ Actual
        	            	@@ -1,3 +1,3 @@
        	            	-([]uint8) (len=6) {
        	            	- 00000000  66 6f 6f 66 6f 6f                                 |foofoo|
        	            	+([]uint8) (len=3) {
        	            	+ 00000000  66 6f 6f                                          |foo|
        	            	 }
        	Test:       	TestNewTruncatingFileWriterWithAutoTruncateTwice


Expected :[]byte{0x66, 0x6f, 0x6f, 0x66, 0x6f, 0x6f}
Actual   :[]byte{0x66, 0x6f, 0x6f}

I happened roughly 1 out of five executions. always after a previous test was forcibly terminated. I am documenting the behavior here for future reference.