add fuzz

Author: zephyrtronium

eval_fuzz_test.go

@@ -0,0 +1,20 @@
+//go:build go1.18
+// +build go1.18
+
+package expressions_test
+
+import (
+	"math/big"
+	"testing"
+
+	"github.com/zephyrtronium/expressions"
+)
+
+func FuzzEval(f *testing.F) {
+	f.Add("x")
+	f.Add("y")
+	f.Add("1×2")
+	f.Fuzz(func(t *testing.T, s string) {
+		expressions.EvalString(s, expressions.SetVar("x", new(big.Float)))
+	})
+}

go.mod

@@ -1,5 +1,5 @@
 module github.com/zephyrtronium/expressions
 
-go 1.16
+go 1.18
 
 require github.com/zephyrtronium/bigfloat v0.0.0-20200813004907-069b2a5e25b7