Add http assert matcher NotEmpty (#291)

## What

- http assert matcher NotEmpty

## References

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## Checklist

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- [ ] Tests

Author: stefanTolksdorf

pkg/httpassert/matcher.go

@@ -56,3 +56,16 @@ func Regex(expr string) Matcher {
 		return assert.Regexp(t, re, value)
 	}
 }
+
+// NotEmpty checks if a string is not empty
+// Example: ExpectJsonPath("$.data.name", httpassert.NotEmpty())
+func NotEmpty() Matcher {
+	return func(t *testing.T, value any) bool {
+		str, ok := value.(string)
+		if !ok {
+			return assert.Fail(t, "value is not a string")
+		}
+
+		return assert.NotEmpty(t, str)
+	}
+}

pkg/httpassert/matcher_test.go

@@ -41,3 +41,18 @@ func Test_ContainsMatcher(t *testing.T) {
 		StatusCode(http.StatusOK).
 		JsonPath("$.data.name", Contains("foo"))
 }
+
+func Test_NoEmptyMatcher(t *testing.T) {
+	router := http.NewServeMux()
+	router.HandleFunc("/api", func(w http.ResponseWriter, r *http.Request) {
+		_, err := fmt.Fprint(w, `{"data":{"name":  "a"}}`)
+		assert.NoError(t, err)
+	})
+
+	request := New(t, router)
+
+	request.Get("/api").
+		Expect().
+		StatusCode(http.StatusOK).
+		JsonPath("$.data.name", NotEmpty())
+}