1 files changed, 84 insertions, 0 deletions
diff --git a/tests/core/transition/cmdline_test.go b/tests/core/transition/cmdline_test.go
new file mode 100644
index 00000000..1de0b3f5
--- /dev/null
+++ b/tests/core/transition/cmdline_test.go
@@ -0,0 +1,84 @@
+// Copyright 2020 The Bazel Authors. All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//    http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package cmdline_test
+
+import (
+	"bytes"
+	"testing"
+
+	"github.com/bazelbuild/rules_go/go/tools/bazel_testing"
+)
+
+func TestMain(m *testing.M) {
+	bazel_testing.TestMain(m, bazel_testing.Args{
+		Main: `
+-- BUILD.bazel --
+load("@io_bazel_rules_go//go:def.bzl", "go_binary")
+
+go_binary(
+    name = "maybe_pure",
+    srcs = [
+        "not_pure.go",
+        "pure.go",
+    ],
+)
+
+-- not_pure.go --
+// +build cgo
+
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("not pure")
+}
+
+-- pure.go --
+// +build !cgo
+
+package main
+
+import "fmt"
+
+func main() {
+	fmt.Println("pure")
+}
+`,
+	})
+}
+
+// TestPure checks that the --@io_bazel_rules_go//go/config:pure flag controls
+// whether a target is built in pure mode. It doesn't actually require cgo,
+// since that doesn't work within go_bazel_test on Windows.
+func TestPure(t *testing.T) {
+	out, err := bazel_testing.BazelOutput("run", "//:maybe_pure")
+	if err != nil {
+		t.Fatalf("running //:maybe_pure without flag: %v", err)
+	}
+	got := string(bytes.TrimSpace(out))
+	if want := "not pure"; got != want {
+		t.Fatalf("got %q; want %q", got, want)
+	}
+
+	out, err = bazel_testing.BazelOutput("run", "--@io_bazel_rules_go//go/config:pure", "//:maybe_pure")
+	if err != nil {
+		t.Fatalf("running //:maybe_pure with flag: %v", err)
+	}
+	got = string(bytes.TrimSpace(out))
+	if want := "pure"; got != want {
+		t.Fatalf("got %q; want %q", got, want)
+	}
+}