1 files changed, 48 insertions, 0 deletions
diff --git a/go/tools/builders/stdliblist_test.go b/go/tools/builders/stdliblist_test.go
new file mode 100644
index 00000000..b456b0be
--- /dev/null
+++ b/go/tools/builders/stdliblist_test.go
@@ -0,0 +1,48 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+func Test_stdliblist(t *testing.T) {
+	testDir := t.TempDir()
+	outJSON := filepath.Join(testDir, "out.json")
+
+	test_args := []string{
+		fmt.Sprintf("-out=%s", outJSON),
+		"-sdk=external/go_sdk",
+	}
+
+	if err := stdliblist(test_args); err != nil {
+		t.Errorf("calling stdliblist got err: %v", err)
+	}
+	f, err := os.Open(outJSON)
+	if err != nil {
+		t.Errorf("cannot open output json: %v", err)
+	}
+	defer func() { _ = f.Close() }()
+	decoder := json.NewDecoder(f)
+	for decoder.More() {
+		var result *flatPackage
+		if err := decoder.Decode(&result); err != nil {
+			t.Errorf("unable to decode output json: %v\n", err)
+		}
+
+		if !strings.HasPrefix(result.ID, "@io_bazel_rules_go//stdlib") {
+			t.Errorf("ID should be prefixed with @io_bazel_rules_go//stdlib :%v", result)
+		}
+		if !strings.HasPrefix(result.ExportFile, "__BAZEL_OUTPUT_BASE__") {
+			t.Errorf("export file should be prefixed with __BAZEL_OUTPUT_BASE__ :%v", result)
+		}
+		for _, gofile := range result.GoFiles {
+			if !strings.HasPrefix(gofile, "__BAZEL_OUTPUT_BASE__/external/go_sdk") {
+				t.Errorf("all go files should be prefixed with __BAZEL_OUTPUT_BASE__/external/go_sdk :%v", result)
+			}
+		}
+	}
+}