Migrating Fuzz testing to Go built-in testing

.github/workflows/fuzz.yaml

@@ -0,0 +1,20 @@
+name: Fuzz Testing
+on:
+  # Perform Fuzz testing on PRs and on a daily basis. Daily will continue to
+  # look for problems. Doing this on PRs will look for issues introduced in
+  # a change.
+  pull_request:
+  schedule:
+    - cron: '33 23 * * *' # Run at 11:33 every day
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Install Go
+      uses: actions/setup-go@v3
+      with:
+        go-version: "1.20"
+    - name: Checkout code
+      uses: actions/checkout@v3
+    - name: Fuzz
+      run: make fuzz

Makefile

@@ -1,7 +1,5 @@
 GOPATH=$(shell go env GOPATH)
 GOLANGCI_LINT=$(GOPATH)/bin/golangci-lint
-GOFUZZBUILD = $(GOPATH)/bin/go-fuzz-build
-GOFUZZ = $(GOPATH)/bin/go-fuzz
 
 .PHONY: lint
 lint: $(GOLANGCI_LINT)
@@ -19,19 +17,14 @@ test-cover:
 	GO111MODULE=on go test -cover .
 
 .PHONY: fuzz
-fuzz: $(GOFUZZBUILD) $(GOFUZZ)
-	@echo "==> Fuzz testing"
-	$(GOFUZZBUILD)
-	$(GOFUZZ) -workdir=_fuzz
+fuzz:
+	@echo "==> Running Fuzz Tests"
+	go test -fuzz=FuzzNewVersion -fuzztime=15s .
+	go test -fuzz=FuzzStrictNewVersion -fuzztime=15s .
+	go test -fuzz=FuzzNewConstraint -fuzztime=15s .
 
 $(GOLANGCI_LINT):
 	# Install golangci-lint. The configuration for it is in the .golangci.yml
 	# file in the root of the repository
 	echo ${GOPATH}
 	curl -sfL https://install.goreleaser.com/github.com/golangci/golangci-lint.sh | sh -s -- -b $(GOPATH)/bin v1.17.1
-
-$(GOFUZZBUILD):
-	cd / && go get -u github.com/dvyukov/go-fuzz/go-fuzz-build
-
-$(GOFUZZ):
-	cd / && go get -u github.com/dvyukov/go-fuzz/go-fuzz github.com/dvyukov/go-fuzz/go-fuzz-dep

constraints_test.go

@@ -776,3 +776,36 @@ func TestTextUnmarshalConstraints(t *testing.T) {
 		}
 	}
 }
+
+func FuzzNewConstraint(f *testing.F) {
+	testcases := []string{
+		"v1.2.3",
+		" ",
+		"......",
+		"1",
+		"1.2.3-beta.1",
+		"1.2.3+foo",
+		"2.3.4-alpha.1+bar",
+		"lorem ipsum",
+		"*",
+		"!=1.2.3",
+		"^4.5",
+		"1.0.0 - 2",
+		"1.2.3.4.5.6",
+		">= 1",
+		"~9.8.7",
+		"<= 12.13.14",
+		"987654321.123456789.654123789",
+		"1.x",
+		"2.3.x",
+		"9.2-beta.0",
+	}
+
+	for _, tc := range testcases {
+		f.Add(tc)
+	}
+
+	f.Fuzz(func(t *testing.T, a string) {
+		_, _ = NewConstraint(a)
+	})
+}

version_test.go

@@ -681,3 +681,27 @@ func TestValidateMetadata(t *testing.T) {
 		}
 	}
 }
+
+func FuzzNewVersion(f *testing.F) {
+	testcases := []string{"v1.2.3", " ", "......", "1", "1.2.3-beta.1", "1.2.3+foo", "2.3.4-alpha.1+bar", "lorem ipsum"}
+
+	for _, tc := range testcases {
+		f.Add(tc)
+	}
+
+	f.Fuzz(func(t *testing.T, a string) {
+		_, _ = NewVersion(a)
+	})
+}
+
+func FuzzStrictNewVersion(f *testing.F) {
+	testcases := []string{"v1.2.3", " ", "......", "1", "1.2.3-beta.1", "1.2.3+foo", "2.3.4-alpha.1+bar", "lorem ipsum"}
+
+	for _, tc := range testcases {
+		f.Add(tc)
+	}
+
+	f.Fuzz(func(t *testing.T, a string) {
+		_, _ = StrictNewVersion(a)
+	})
+}