diff options
| -rw-r--r-- | tools/go_marshal/gomarshal/generator.go | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/tools/go_marshal/gomarshal/generator.go b/tools/go_marshal/gomarshal/generator.go index d3c2f72f5..0fa868415 100644 --- a/tools/go_marshal/gomarshal/generator.go +++ b/tools/go_marshal/gomarshal/generator.go @@ -380,6 +380,26 @@ func (g *Generator) writeTests(ts []*testGenerator) error { } // Write test functions. + + // If we didn't generate any Marshallable implementations, we can't just + // emit an empty test file, since that causes the build to fail with "no + // tests/benchmarks/examples found". Unfortunately we can't signal bazel to + // omit the entire package since the outputs are already defined before + // go-marshal is called. If we'd otherwise emit an empty test suite, emit an + // empty example instead. + if len(ts) == 0 { + b.reset() + b.emit("func ExampleEmptyTestSuite() {\n") + b.inIndent(func() { + b.emit("// This example is intentionally empty to ensure this file contains at least\n") + b.emit("// one testable entity. go-marshal is forced to emit a test file if a package\n") + b.emit("// is marked marshallable, but emitting a test file with no entities results\n") + b.emit("// in a build failure.\n") + }) + b.emit("}\n") + return b.write(g.outputTest) + } + for _, t := range ts { if err := t.write(g.outputTest); err != nil { return err |