Merge pull request #15355 from github/mbg/go/increase-test-robustness

Go: Improve robustness of integration tests

Author: mbg

go/ql/integration-tests/all-platforms/go/bazel-sample-1/BUILD.bazel renamed to go/ql/integration-tests/all-platforms/go/bazel-sample-1/src/BUILD.bazel

@@ -1,7 +1,7 @@
+#select
+| src/test.go:0:0:0:0 | src/test.go |
+| src/todel.go:0:0:0:0 | src/todel.go |
 htmlFiles
 extractionErrors
 | Extraction failed in test.go with error \tother declaration of test | 2 |
 | Extraction failed in todel.go with error test redeclared in this block | 2 |
-#select
-| test.go:0:0:0:0 | test.go |
-| todel.go:0:0:0:0 | todel.go |

go/ql/integration-tests/all-platforms/go/bazel-sample-1/go.mod renamed to go/ql/integration-tests/all-platforms/go/bazel-sample-1/src/go.mod

@@ -1,8 +1,19 @@
-import sys
+import os
+import subprocess
 
 from create_database_utils import *
 from diagnostics_test_utils import *
 
-run_codeql_database_create([], lang="go")
+# Set up a GOPATH relative to this test's root directory;
+# we set os.environ instead of using extra_env because we
+# need it to be set for the call to "go clean -modcache" later
+goPath = os.path.join(os.path.abspath(os.getcwd()), ".go")
+os.environ['GOPATH'] = goPath
+
+run_codeql_database_create([], lang="go", source="src")
 
 check_diagnostics()
+
+# Clean up the temporary GOPATH to prevent Bazel failures next
+# time the tests are run; see https://github.com/golang/go/issues/27161
+subprocess.call(["go", "clean", "-modcache"])