Correctly represent string literals when querying types through PostgresTypes.lookupType

Type names are properly quoted when querying for these.

[resolves #437]

Signed-off-by: Mark Paluch <[email protected]>

Author: mp911de

src/test/java/io/r2dbc/postgresql/codec/PostgresTypesIntegrationTests.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright 2021 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 io.r2dbc.postgresql.codec;
+
+import io.r2dbc.postgresql.AbstractIntegrationTests;
+import io.r2dbc.spi.Connection;
+import org.junit.jupiter.api.Test;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+import reactor.test.StepVerifier;
+
+import java.util.Arrays;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Integration tests for {@link PostgresTypes}.
+ */
+class PostgresTypesIntegrationTests extends AbstractIntegrationTests {
+
+    @Test
+    void shouldLookupSingleType() {
+
+        Mono.usingWhen(getConnectionFactory().create(), c -> {
+            return PostgresTypes.from(c).lookupType("varchar");
+        }, Connection::close).map(PostgresTypes.PostgresType::getName).map(String::toLowerCase)
+            .as(StepVerifier::create).expectNext("varchar").verifyComplete();
+    }
+
+    @Test
+    void shouldLookupMultipleType() {
+
+        Flux.usingWhen(getConnectionFactory().create(), c -> {
+            return PostgresTypes.from(c).lookupTypes(Arrays.asList("varchar", "int4"));
+        }, Connection::close).map(PostgresTypes.PostgresType::getName).map(String::toLowerCase).collectList()
+            .as(StepVerifier::create).consumeNextWith(actual -> {
+            assertThat(actual).contains("varchar", "int4");
+        }).verifyComplete();
+    }
+
+}