add code

runregexp.go

@@ -0,0 +1,69 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+	"os"
+	"regexp"
+	"strings"
+)
+
+const definition_file = "tests.json"
+
+type TestDefinition struct {
+	TestExpression    *Regexp  `json:"test_expression"`
+	FailCandidates    []string `json:"fail_candidates"`
+	SucceedCandidates []string `json:"succeed_candidates"`
+}
+
+type Regexp struct {
+	*regexp.Regexp
+}
+
+func (r *Regexp) UnmarshalJSON(b []byte) error {
+	rg, e := regexp.Compile(strings.Trim(string(b), "\""))
+	if e != nil {
+		return e
+	}
+
+	r.Regexp = rg
+
+	return nil
+}
+
+func main() {
+
+	var test_definition TestDefinition
+
+	b, e := os.ReadFile(definition_file)
+	if e != nil {
+		log.Fatalf("Unable to read test definition file: %s\n", e)
+	}
+
+	e = json.Unmarshal(b, &test_definition)
+	if e != nil {
+		log.Fatalf("Unable to parse test definition file: %s\n", e)
+	}
+
+	all_passed := true
+
+	for _, item := range test_definition.FailCandidates {
+		if test_definition.TestExpression.MatchString(item) == true {
+			all_passed = false
+			fmt.Printf("FAILED on input %s: should fail to match\n", item)
+		}
+	}
+
+	for _, item := range test_definition.SucceedCandidates {
+		if test_definition.TestExpression.MatchString(item) == false {
+			all_passed = false
+			fmt.Printf("FAILED on input %s: should match\n", item)
+		}
+	}
+
+	if all_passed {
+		fmt.Println("All tests pass")
+	}
+
+}