✨ Add Erlang as a language (#4406)

Signed-off-by: Kiko Fernandez-Reyes <[email protected]>

Author: kikofernandez

checks/raw/fuzzing.go

@@ -56,6 +56,14 @@ var languageFuzzSpecs = map[clients.LanguageName]languageFuzzConfig{
 		Desc: asPointer(
 			"Go fuzzing intelligently walks through the source code to report failures and find vulnerabilities."),
 	},
+	// Fuzz patterns for Erlang based on property-based testing.
+	clients.Erlang: {
+		filePatterns: []string{"*.erl", "*.hrl"},
+		// Look for direct imports of QuickCheck or Proper,
+		funcPattern: `-include_lib\("(eqc|proper)/include/(eqc|proper).hrl"\)\.`,
+		Name:        fuzzers.PropertyBasedErlang,
+		Desc:        propertyBasedDescription("Erlang"),
+	},
 	// Fuzz patterns for Haskell based on property-based testing.
 	//
 	// Based on the import of one of these packages:

checks/raw/fuzzing_test.go

@@ -260,6 +260,43 @@ func Test_checkFuzzFunc(t *testing.T) {
 			},
 			fileContent: "func TestFoo (t *testing.T)",
 		},
+		{
+			name:     "Erlang QuickCheck",
+			want:     true,
+			fileName: []string{"erlang-eqc.hs"},
+			langs: []clients.Language{
+				{
+					Name:     clients.Erlang,
+					NumLines: 50,
+				},
+			},
+			fileContent: "-include_lib(\"eqc/include/eqc.hrl\").",
+		},
+		{
+			name:     "Erlang Proper",
+			want:     true,
+			fileName: []string{"erlang-proper.hs"},
+			langs: []clients.Language{
+				{
+					Name:     clients.Erlang,
+					NumLines: 50,
+				},
+			},
+			fileContent: "-include_lib(\"proper/include/proper.hrl\").",
+		},
+		{
+			name:     "Erlang with no property-based testing",
+			want:     false,
+			fileName: []string{"erlang-ct.erl"},
+			wantErr:  true,
+			langs: []clients.Language{
+				{
+					Name:     clients.Erlang,
+					NumLines: 50,
+				},
+			},
+			fileContent: "-include_lib(\"common_test/include/ct.hrl\").",
+		},
 		{
 			name:     "Haskell QuickCheck",
 			want:     true,

clients/languages.go

@@ -74,6 +74,9 @@ const (
 	// Dockerfile: https://docs.docker.com/engine/reference/builder/
 	Dockerfile LanguageName = "dockerfile"
 
+	// Erlang: https://www.erlang.org/
+	Erlang LanguageName = "erlang"
+
 	// Haskell: https://www.haskell.org/
 	Haskell LanguageName = "haskell"
 

docs/checks.md

@@ -343,6 +343,7 @@ This check tries to determine if the project uses
    - 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/).
+   - a limited set of property-based testing libraries for Erlang, including proper and quickcheck.
 
 Fuzzing, or fuzz testing, is the practice of feeding unexpected or random data
 into a program to expose bugs. Regular fuzzing is important to detect

docs/checks/internal/checks.yaml

@@ -403,6 +403,7 @@ checks:
          - 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/).
+         - a limited set of property-based testing libraries for Erlang, including proper and quickcheck.
 
       Fuzzing, or fuzz testing, is the practice of feeding unexpected or random data
       into a program to expose bugs. Regular fuzzing is important to detect

internal/fuzzers/fuzzers.go

@@ -19,6 +19,7 @@ const (
 	OSSFuzz                 = "OSSFuzz"
 	ClusterFuzzLite         = "ClusterFuzzLite"
 	BuiltInGo               = "GoBuiltInFuzzer"
+	PropertyBasedErlang     = "ErlangPropertyBasedTesting"
 	PropertyBasedHaskell    = "HaskellPropertyBasedTesting"
 	PropertyBasedJavaScript = "JavaScriptPropertyBasedTesting"
 	PropertyBasedTypeScript = "TypeScriptPropertyBasedTesting"