rm -rf  /var/log/*log \
    /var/lib/apt/lists/* \
    /var/log/apt/* \
    /var/lib/dpkg/*-old \
    /var/cache/debconf/*-old

RUN go get -u github.com/dvyukov/go-fuzz/go-fuzz \
    github.com/dvyukov/go-fuzz/go-fuzz-dep \
    github.com/dvyukov/go-fuzz/go-fuzz-build

COPY . /istio

// 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 fuzz

import (
	"istio.io/istio/pilot/pkg/config/kube/crd"
)

func FuzzParseInputs(data []byte) int {
	_, _, err := crd.ParseInputs(string(data))
	if err != nil {
		return 0
	}
	return 1

// F is a type passed to fuzz tests.
//
// Fuzz tests run generated inputs against a provided fuzz target, which can
// find and report potential bugs in the code being tested.
//
// A fuzz test runs the seed corpus by default, which includes entries provided
// by (*F).Add and entries in the testdata/fuzz/<FuzzTestName> directory. After
// any necessary setup and calls to (*F).Add, the fuzz test must then call

		if coverageEnabled {
			fmt.Fprintf(c.opts.Log, "fuzz: elapsed: %s, gathering baseline coverage: %d/%d completed\n", c.elapsed(), runSoFar, c.warmupInputCount)
		} else {
			fmt.Fprintf(c.opts.Log, "fuzz: elapsed: %s, testing seed corpus: %d/%d completed\n", c.elapsed(), runSoFar, c.warmupInputCount)
		}
	} else if c.crashMinimizing != nil {
		fmt.Fprintf(c.opts.Log, "fuzz: elapsed: %s, minimizing\n", c.elapsed())
	} else {

        when:
        iterator = source.listIterator()
        iterator.add("bizz")

        then:
        source.iteratorNoFlush().collect() == ["bizz", "foo", "fuzz", "fizz", "bazz", "buzz"]

        and:
        source.iterator().collect() == ["bizz", "foo", "bar", "baz", "buzz", "fuzz", "fizz", "bazz", "buzz"]
    }

    def "listIterator can set elements"() {
        given:

[!fuzz-instrumented] skip

[short] skip
env GOCACHE=$WORK/cache

# Fuzz cache should not exist after a regular test run.
go test .
exists $GOCACHE
! exists $GOCACHE/fuzz

# Fuzzing should write interesting values to the cache.
go test -fuzz=FuzzY -fuzztime=100x .
go run ./contains_files $GOCACHE/fuzz/example.com/y/FuzzY

# 'go clean -cache' should not delete the fuzz cache.
go clean -cache
exists $GOCACHE/fuzz

[!fuzz] skip
[short] skip
env GOCACHE=$WORK/cache

go test -fuzz=FuzzA -fuzztime=100x fuzz_setenv_test.go

-- fuzz_setenv_test.go --
package fuzz

import (
  "flag"
  "os"
  "testing"
)

func FuzzA(f *testing.F) {
  if s := os.Getenv("TEST_FUZZ_SETENV_A"); isWorker() && s == "" {
    f.Fatal("environment variable not set")
  } else if !isWorker() && s != "" {
    f.Fatal("environment variable already set")
  }

        when:
        source.add("buzz")
        iterator = source.iterator()
        next = iterator.next()

        then:
        next == "baz"

        when:
        iterator.remove()

        then:
        iterator.hasNext()
        source.iterator().collect() == ["fooz", "fizz", "fuzz", "buzz"]

        when:

[!fuzz] skip

# Test basic fuzzing mutator behavior.
#
# fuzz_test.go has two fuzz targets (FuzzA, FuzzB) which both add a seed value.
# Each fuzz function writes the input to a log file. The coordinator and worker
# use separate log files. check_logs.go verifies that the coordinator only
# tests seed values and the worker tests mutated values on the fuzz target.

[short] skip
env GOCACHE=$WORK/cache

## Native fuzzers

While many jobs are still using the old [go-fuzz](https://github.com/dvyukov/go-fuzz) style fuzzers, using [Go 1.18 native fuzzing](https://go.dev/doc/fuzz/) is preferred.
These should be written alongside standard test packages.
Currently, these cannot be in `<pkg>_test` packages; instead move them to a file under `<pkg>`.