Fixed conversion to and from YAML; fixes gh-1921

spring-cloud-contract-verifier/src/main/java/org/springframework/cloud/contract/verifier/converter/ContractsToYaml.java

@@ -176,27 +176,19 @@ else if (value instanceof RegexProperty || value instanceof Pattern) {
 	}
 
 	private void mapRequestMatchersUrl(YamlContract.Request yamlContractRequest, Request request) {
-		Object url = Optional.ofNullable(request.getUrl()).map(Url::getClientValue).orElse(null);
+		Object url = Optional.ofNullable(request.getUrl()).map(Url::getClientValue)
+				.orElse(Optional.ofNullable(request.getUrlPath()).map(Url::getClientValue).orElse(null));
 		YamlContract.KeyValueMatcher keyValueMatcher = new YamlContract.KeyValueMatcher();
 		if (url instanceof RegexProperty) {
 			keyValueMatcher.regex = ((RegexProperty) url).pattern();
 			yamlContractRequest.matchers.url = keyValueMatcher;
 		}
-		else if (url instanceof ExecutionProperty) {
-			keyValueMatcher.command = url.toString();
+		else if (url instanceof Pattern) {
+			keyValueMatcher.regex = ((Pattern) url).pattern();
 			yamlContractRequest.matchers.url = keyValueMatcher;
 		}
-		else {
-			yamlContractRequest.matchers.url = null;
-		}
-
-		Object urlPath = Optional.ofNullable(request.getUrlPath()).map(Url::getClientValue).orElse(null);
-		if (urlPath instanceof RegexProperty) {
-			keyValueMatcher.regex = ((RegexProperty) urlPath).pattern();
-			yamlContractRequest.matchers.url = keyValueMatcher;
-		}
-		else if (urlPath instanceof ExecutionProperty) {
-			keyValueMatcher.command = urlPath.toString();
+		else if (url instanceof ExecutionProperty) {
+			keyValueMatcher.command = url.toString();
 			yamlContractRequest.matchers.url = keyValueMatcher;
 		}
 		else {
@@ -578,7 +570,7 @@ protected YamlContract.TestMatcherType testMatcherType(MatchingType matchingType
 
 	protected YamlContract.StubMatcherType stubMatcherType(MatchingType matchingType) {
 		if (matchingType == MatchingType.COMMAND || matchingType == MatchingType.TYPE) {
-			throw new UnsupportedOperationException("No type or command for client side");
+			return null;
 		}
 		return STUB_MATCHER_TYPE.getOrDefault(matchingType, null);
 	}

spring-cloud-contract-verifier/src/test/groovy/org/springframework/cloud/contract/verifier/converter/YamlContractConverterSpec.groovy

@@ -392,6 +392,41 @@ class YamlContractConverterSpec extends Specification {
 		urlPropertyName << ['url', 'urlPath']
 	}
 
+	@Issue('#1921')
+	def 'should convert YAML to Contract and back to YAML without losing url information'() {
+		given:
+		File ymlMatchers = File.createTempFile('contract_matchers_url', '.yml').with {
+			write YamlContractConverterSpec.getResource('/yml/contract_matchers_url.yml')
+					.text
+					return it
+		}
+		expect:
+			converter.isAccepted(ymlMatchers)
+		when:
+			Collection<Contract> contracts = converter.convertFrom(ymlMatchers)
+			List<YamlContract> convertedBack = converter.convertTo(contracts)
+		then:
+			convertedBack.size() == 1
+			convertedBack[0].request.matchers.url.regex == "/get/[0-9]"
+	}
+
+	@Issue('#1921')
+	def 'should convert YAML to Contract and back to YAML without exceptions'() {
+		given:
+		File ymlMatchers = File.createTempFile('contract_matchers', '.yml').with {
+			write YamlContractConverterSpec.getResource('/yml/contract_matchers.yml')
+					.text
+					return it
+		}
+		expect:
+			converter.isAccepted(ymlMatchers)
+		when:
+			Collection<Contract> contracts = converter.convertFrom(ymlMatchers)
+			List<YamlContract> convertedBack = converter.convertTo(contracts)
+		then:
+			convertedBack.size() == 1
+	}
+
 	protected Object assertQueryParam(QueryParameters queryParameters, String queryParamName, Object serverValue,
 			MatchingStrategy.Type clientType, Object clientValue) {
 		if (clientType == MatchingStrategy.Type.ABSENT) {

spring-cloud-contract-verifier/src/test/resources/yml/contract_matchers_url.yml

@@ -0,0 +1,8 @@
+request:
+  method: GET
+  urlPath: /get/1
+  matchers:
+    url:
+      regex: /get/[0-9]
+response:
+  status: 200