go-test: add page (#6130)

Co-authored-by: bl-ue <54780737+bl-ue@users.noreply.github.com>

pages/common/go-test.md

@@ -0,0 +1,24 @@
+# go test
+
+> Tests Go packages (files have to end with `_test.go`).
+> More information: <https://golang.org/cmd/go/#hdr-Testing_flags>.
+
+- Test the package found in the current directory:
+
+`go test`
+
+- [v]erbosely test the package in the current directory:
+
+`go test -v`
+
+- Test the packages in the current directory and all subdirectories (note the `...`):
+
+`go test -v ./...`
+
+- Test the package in the current directory and run all benchmarks:
+
+`go test -v -bench .`
+
+- Test the package in the current directory and run all benchmarks for 50 seconds:
+
+`go test -v -bench . -benchtime {{50s}}`