move more fuzzers over from cncf-fuzzing

Signed-off-by: Adam Korczynski <adam@adalogics.com>

pkg/chart/loader/fuzz_test.go

@@ -0,0 +1,37 @@
+/*
+Copyright The Helm Authors.
+
+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 loader
+
+import (
+	"testing"
+
+	fuzz "github.com/AdaLogics/go-fuzz-headers"
+)
+
+// FuzzLoadDir creates a directory with a lot
+// of random files and then loads it.
+func FuzzLoadDir(f *testing.F) {
+	f.Fuzz(func(t *testing.T, filesData []byte) {
+		tmpDir := t.TempDir()
+		fdp := fuzz.NewConsumer(filesData)
+		err := fdp.CreateFiles(tmpDir)
+		if err != nil {
+			return
+		}
+		_, _ = LoadDir(tmpDir)
+	})
+}

pkg/engine/fuzz_test.go

@@ -0,0 +1,61 @@
+/*
+Copyright The Helm Authors.
+
+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 engine
+
+import (
+	"testing"
+
+	"helm.sh/helm/v3/pkg/chart"
+	"helm.sh/helm/v3/pkg/chartutil"
+
+	fuzz "github.com/AdaLogics/go-fuzz-headers"
+)
+
+func FuzzEngineRender(f *testing.F) {
+	f.Fuzz(func(_ *testing.T, chartData, valuesBytes []byte) {
+		fdp := fuzz.NewConsumer(chartData)
+		chrt := &chart.Chart{}
+		err := fdp.GenerateStruct(chrt)
+		if err != nil {
+			return
+		}
+		values, err := chartutil.ReadValues(valuesBytes)
+		if err != nil {
+			return
+		}
+		_, _ = Render(chrt, values)
+	})
+}
+
+func FuzzEngineFiles(f *testing.F) {
+	f.Fuzz(func(_ *testing.T, path, pattern, name, str1, str2, str3, str4, str5 string,
+		b1, b2, b3, b4, b5 []byte) {
+		files := make(files)
+		files[str1] = b1
+		files[str2] = b2
+		files[str3] = b3
+		files[str4] = b4
+		files[str5] = b5
+
+		// Test various methods of files
+		_ = files.Get(name)
+		_ = files.Glob(pattern)
+		_ = files.AsConfig()
+		_ = files.AsSecrets()
+		_ = files.Lines(path)
+	})
+}