readme: update section about testing

Part of #123

Makefile

@@ -11,9 +11,32 @@ deps: clean
 	( cd ./queue; tarantoolctl rocks install queue 1.1.0 )
 
 .PHONY: test
-test:
+test: test-main test-multi test-queue test-uuid
+
+.PHONY: test-multi
+test-multi:
+	@echo "Running tests in multiconnection package"
+	go clean -testcache
+	go test ./multi/ -v -p 1
+
+.PHONY: test-queue
+test-queue:
+	@echo "Running tests in queue package"
+	cd ./queue/ && tarantool -e "require('queue')"
+	go clean -testcache
+	go test ./queue/ -v -p 1
+
+.PHONY: test-uuid
+test-uuid:
+	@echo "Running tests in UUID package"
+	go clean -testcache
+	go test ./uuid/ -v -p 1
+
+.PHONY: test-main
+test-main:
+	@echo "Running tests in main package"
 	go clean -testcache
-	go test ./... -v -p 1	
+	go test . -v -p 1
 
 .PHONY: coverage
 coverage:

README.md

@@ -187,17 +187,14 @@ make test
 ```
 Tests set up all required `tarantool` processes before run and clean up after.
 
-If you want to run a specific package tests, go to a package folder
+If you want to run a specific package tests, call
 ```bash
-cd multi
+make test-<SUBDIR>
 ```
-and call
+For example, for running tests in `multi`, `uuid` and `main` packages, call
 ```bash
-go clean -testcache && go test -v
+make test-multi test-uuid test-main
 ```
-Use the same for main `tarantool` package and `queue` and `uuid` subpackages.
-`uuid` tests require
-[Tarantool 2.4.1 or newer](https://github.com/tarantool/tarantool/commit/d68fc29246714eee505bc9bbcd84a02de17972c5).
 
 ## Alternative connectors