--- /dev/null
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package buildtag_test
+
+import (
+ "testing"
+
+ "golang.org/x/tools/go/analysis"
+ "golang.org/x/tools/go/analysis/analysistest"
+ "golang.org/x/tools/go/analysis/passes/buildtag"
+)
+
+func Test(t *testing.T) {
+ analyzer := *buildtag.Analyzer
+ analyzer.Run = func(pass *analysis.Pass) (interface{}, error) {
+ defer func() {
+ // The buildtag pass is unusual in that it checks the IgnoredFiles.
+ // After analysis, add IgnoredFiles to OtherFiles so that
+ // the test harness checks for expected diagnostics in those.
+ // (The test harness shouldn't do this by default because most
+ // passes can't do anything with the IgnoredFiles without type
+ // information, which is unavailable because they are ignored.)
+ var files []string
+ files = append(files, pass.OtherFiles...)
+ files = append(files, pass.IgnoredFiles...)
+ pass.OtherFiles = files
+ }()
+
+ return buildtag.Analyzer.Run(pass)
+ }
+ analysistest.Run(t, analysistest.TestData(), &analyzer, "a")
+}