Includes charset in regular expressions; fixes gh-1603

specs/spring-cloud-contract-spec-java/src/test/groovy/org/springframework/cloud/contract/spec/internal/RegexPropertyTests.java

@@ -0,0 +1,52 @@
+/*
+ * Copyright 2013-2020 the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.springframework.cloud.contract.spec.internal;
+
+import java.nio.charset.StandardCharsets;
+import java.util.regex.Pattern;
+
+import org.assertj.core.api.BDDAssertions;
+import org.junit.jupiter.api.Test;
+
+class RegexPropertyTests {
+
+	@Test
+	void should_generate_utf8_compliant_text_from_regex() {
+		RegexProperty regexProperty = new RegexProperty(
+				Pattern.compile("......................"));
+
+		String object = (String) regexProperty.generate();
+
+		String utf8EncodedString = new String(object.getBytes(StandardCharsets.UTF_8),
+				StandardCharsets.UTF_8);
+		BDDAssertions.then(object).isEqualTo(utf8EncodedString);
+	}
+
+	@Test
+	void should_generate_custom_charset_compliant_text_from_regex() {
+		RegexProperty regexProperty = new RegexProperty(
+				Pattern.compile("......................"));
+
+		String object = (String) regexProperty.asString(StandardCharsets.US_ASCII)
+				.generate();
+
+		String utf8EncodedString = new String(object.getBytes(StandardCharsets.US_ASCII),
+				StandardCharsets.US_ASCII);
+		BDDAssertions.then(object).isEqualTo(utf8EncodedString);
+	}
+
+}