✨ Detect fast-check PBT library for fuzz section

As suggested at #2792 (comment), we add support for the detection of fast-check as a possible fuzzing solution. I also adapted the documentation related to fuzzing accordingly. Signed-off-by: Nicolas DUBIEN <[email protected]>
ossf · May 26, 2023 · e233301 · e233301
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diff --git a/checks/raw/fuzzing.go b/checks/raw/fuzzing.go
@@ -28,11 +28,13 @@ import (
 )
 
 const (
-	fuzzerOSSFuzz              = "OSSFuzz"
-	fuzzerClusterFuzzLite      = "ClusterFuzzLite"
-	oneFuzz                    = "OneFuzz"
-	fuzzerBuiltInGo            = "GoBuiltInFuzzer"
-	fuzzerPropertyBasedHaskell = "HaskellPropertyBasedTesting"
+	fuzzerOSSFuzz                 = "OSSFuzz"
+	fuzzerClusterFuzzLite         = "ClusterFuzzLite"
+	oneFuzz                       = "OneFuzz"
+	fuzzerBuiltInGo               = "GoBuiltInFuzzer"
+	fuzzerPropertyBasedHaskell    = "HaskellPropertyBasedTesting"
+	fuzzerPropertyBasedJavaScript = "JavaScriptPropertyBasedTesting"
+	fuzzerPropertyBasedTypeScript = "TypeScriptPropertyBasedTesting"
 	// TODO: add more fuzzing check supports.
 )
 
@@ -87,6 +89,30 @@ var languageFuzzSpecs = map[clients.LanguageName]languageFuzzConfig{
 			"Property-based testing in Haskell generates test instances randomly or exhaustively " +
 				"and test that specific properties are satisfied."),
 	},
+	// Fuzz patterns for JavaScript and TypeScript based on property-based testing.
+	//
+	// Based on the import of one of these packages:
+	// * https://fast-check.dev/
+	//
+	// This is not an exhaustive list.
+	clients.JavaScript: {
+		filePattern: "*.js",
+		// Look for direct imports of fast-check.
+		funcPattern: `(from\s+['"]fast-check['"]|require\(\s*['"]fast-check['"]\s*\))`,
+		Name:        fuzzerPropertyBasedJavaScript,
+		Desc: asPointer(
+			"Property-based testing in JavaScript generates test instances randomly or exhaustively " +
+				"and test that specific properties are satisfied."),
+	},
+	clients.TypeScript: {
+		filePattern: "*.ts",
+		// Look for direct imports of fast-check.
+		funcPattern: `(from\s+['"]fast-check['"]|require\(\s*['"]fast-check['"]\s*\))`,
+		Name:        fuzzerPropertyBasedTypeScript,
+		Desc: asPointer(
+			"Property-based testing in JavaScript generates test instances randomly or exhaustively " +
+				"and test that specific properties are satisfied."),
+	},
 	// TODO: add more language-specific fuzz patterns & configs.
 }
 

diff --git a/checks/raw/fuzzing_test.go b/checks/raw/fuzzing_test.go
@@ -413,6 +413,80 @@ func Test_checkFuzzFunc(t *testing.T) {
 			},
 			fileContent: "import Test.Hspec",
 		},
+		{
+			name:     "JavaScript fast-check via require",
+			want:     true,
+			fileName: []string{"main.spec.js"},
+			langs: []clients.Language{
+				{
+					Name:     clients.JavaScript,
+					NumLines: 50,
+				},
+			},
+			fileContent: "const fc = require('fast-check');",
+		},
+		{
+			name:     "JavaScript fast-check via import",
+			want:     true,
+			fileName: []string{"main.spec.js"},
+			langs: []clients.Language{
+				{
+					Name:     clients.JavaScript,
+					NumLines: 50,
+				},
+			},
+			fileContent: "import fc from \"fast-check\";",
+		},
+		{
+			name:     "JavaScript with no property-based testing",
+			want:     false,
+			fileName: []string{"main.spec.js"},
+			wantErr:  true,
+			langs: []clients.Language{
+				{
+					Name:     clients.JavaScript,
+					NumLines: 50,
+				},
+			},
+			fileContent: "const fc = require('fast-other');",
+		},
+		{
+			name:     "TypeScript fast-check via require",
+			want:     true,
+			fileName: []string{"main.spec.ts"},
+			langs: []clients.Language{
+				{
+					Name:     clients.TypeScript,
+					NumLines: 50,
+				},
+			},
+			fileContent: "const fc = require('fast-check');",
+		},
+		{
+			name:     "TypeScript fast-check via import",
+			want:     true,
+			fileName: []string{"main.spec.ts"},
+			langs: []clients.Language{
+				{
+					Name:     clients.TypeScript,
+					NumLines: 50,
+				},
+			},
+			fileContent: "import fc from \"fast-check\";",
+		},
+		{
+			name:     "TypeScript with no property-based testing",
+			want:     false,
+			fileName: []string{"main.spec.ts"},
+			wantErr:  true,
+			langs: []clients.Language{
+				{
+					Name:     clients.TypeScript,
+					NumLines: 50,
+				},
+			},
+			fileContent: "const fc = require('fast-other');",
+		},
 	}
 	for _, tt := range tests {
 		tt := tt

diff --git a/docs/checks/internal/checks.yaml b/docs/checks/internal/checks.yaml
@@ -395,7 +395,9 @@ checks:
       1. if the repository name is included in the [OSS-Fuzz](https://github.com/google/oss-fuzz) project list;
       2. if [ClusterFuzzLite](https://google.github.io/clusterfuzzlite/) is deployed in the repository;
       3. if there are user-defined language-specified fuzzing functions in the repository.
-         - currently only supports [Go fuzzing](https://go.dev/doc/fuzz/) and a limited set of property-based testing libraries for Haskell.
+         - currently only supports [Go fuzzing](https://go.dev/doc/fuzz/),
+         - a limited set of property-based testing libraries for Haskell including [QuickCheck](https://hackage.haskell.org/package/QuickCheck), [Hedgehog](https://hedgehog.qa/), [validity](https://hackage.haskell.org/package/validity) or [SmallCheck](https://hackage.haskell.org/package/smallcheck),
+         - a limited set of property-based testing libraries for JavaScript and TypeScript including [fast-check](https://fast-check.dev/).
       4. if it contains a [OneFuzz](https://github.com/microsoft/onefuzz) integration [detection file](https://github.com/microsoft/onefuzz/blob/main/docs/getting-started.md#detecting-the-use-of-onefuzz);
 
       Fuzzing, or fuzz testing, is the practice of feeding unexpected or random data