[fix] untangle logfile names for tests

tests/instrumentors/logging_instrumentor_tests.rb

@@ -1,12 +1,13 @@
 require 'logger'
+require 'tempfile'
 
 Shindo.tests('logging instrumentor') do
   env_init
 
   tests("connection logger").returns(true) do
     Excon.stub({:method => :get}, {body: 'body', status: 200})
 
-    log_path = "/tmp/excon_#{Time.now.to_i}.txt"
+    log_path = Tempfile.create.path
     logger = Logger.new(log_path)
     # omit datetime to simplify test matcher
     logger.formatter = proc do |severity, datetime, progname, msg|
@@ -19,8 +20,10 @@
       logger: logger,
       mock: true
     )
+
     response = connection.request(method: :get, path: '/logger')
-    File.readlines(log_path)[1..2] == [
+
+    File.readlines(log_path) == [
       "request: http://127.0.0.1/logger\n",
       "response: body\n"
     ]
@@ -29,7 +32,7 @@
   tests("connection logger with query as hash").returns(true) do
     Excon.stub({:method => :get}, {body: 'body', status: 200})
 
-    log_path = "/tmp/excon_#{Time.now.to_i}.txt"
+    log_path = Tempfile.create.path
     logger = Logger.new(log_path)
     # omit datetime to simplify test matcher
     logger.formatter = proc do |severity, datetime, progname, msg|
@@ -47,7 +50,7 @@
       path: '/logger',
       query: {test: 'test'}
     )
-    File.readlines(log_path)[1..2] == [
+    File.readlines(log_path) == [
       "request: http://127.0.0.1/logger?test=test\n",
       "response: body\n"
     ]