Add JsonKotlinIT.kt which shows some Kotlin/jOOQ/JSON interoperability

Author: t9t

integration-tests/src/test/kotlin/com/github/t9t/jooq/json/JsonKotlinIT.kt

@@ -0,0 +1,85 @@
+package com.github.t9t.jooq.json
+
+import com.github.t9t.jooq.generated.Tables
+import org.jooq.JSON
+import org.jooq.JSONB
+import org.jooq.Record1
+import org.jooq.SQLDialect
+import org.jooq.impl.DSL
+import org.junit.Assert
+import org.junit.Assert.assertEquals
+import org.junit.Before
+import org.junit.Test
+
+/**
+ * Validates Kotlin, jOOQ and JSON(B) interoperability
+ */
+class JsonKotlinIT {
+    private val ds = TestDb.createDataSource()
+    private val dsl = DSL.using(ds, SQLDialect.POSTGRES)
+
+    @Before
+    fun setUp() {
+        dsl.deleteFrom(Tables.JSON_TEST).execute()
+        assertEquals(4, dsl.execute("insert into jooq.json_test (name, data, datab)" +
+                " values " +
+                "('both', '{\"json\": {\"int\": 100, \"str\": \"Hello, JSON world!\", \"object\": {\"v\":  200}, \"n\": null}}', '{\"jsonb\": {\"int\": 100, \"str\": \"Hello, JSONB world!\", \"object\": {\"v\": 200}, \"n\": null}}')," +
+                "('empty', '{}', '{}')," +
+                "('null-sql', null, null)," +
+                "('null-json', 'null'::json, 'null'::jsonb)").toLong())
+    }
+
+    @Test
+    fun `select JSON NULL SQL, returning non-null JSON type`() {
+        val r: Record1<JSON> = dsl.select(Tables.JSON_TEST.DATA)
+                .from(Tables.JSON_TEST)
+                .where(Tables.JSON_TEST.NAME.eq("null-sql"))
+                .fetchOne()!!
+        Assert.assertNull(r.value1())
+    }
+
+    @Test
+    fun `select JSON NULL SQL, returning nullable JSON type`() {
+        val r: Record1<JSON?> = dsl.select(Tables.JSON_TEST.DATA)
+                .from(Tables.JSON_TEST)
+                .where(Tables.JSON_TEST.NAME.eq("null-sql"))
+                .fetchOne()!!
+        Assert.assertNull(r.value1())
+    }
+
+    @Test
+    fun `select null JSON value`() {
+        val r: Record1<JSON> = dsl.select(Tables.JSON_TEST.DATA)
+                .from(Tables.JSON_TEST)
+                .where(Tables.JSON_TEST.NAME.eq("null-json"))
+                .fetchOne()!!
+        assertEquals("null", r.value1().toString())
+    }
+
+    @Test
+    fun `select JSON NULL SQL, returning non-null JSONB type`() {
+        val r: Record1<JSONB> = dsl.select(Tables.JSON_TEST.DATAB)
+                .from(Tables.JSON_TEST)
+                .where(Tables.JSON_TEST.NAME.eq("null-sql"))
+                .fetchOne()!!
+        Assert.assertNull(r.value1())
+    }
+
+    @Test
+    fun `select JSON NULL SQL, returning nullable JSONB type`() {
+        val r: Record1<JSONB?> = dsl.select(Tables.JSON_TEST.DATAB)
+                .from(Tables.JSON_TEST)
+                .where(Tables.JSON_TEST.NAME.eq("null-sql"))
+                .fetchOne()!!
+        Assert.assertNull(r.value1())
+    }
+
+    @Test
+    fun `select null JSONB value`() {
+        val r = dsl.select(Tables.JSON_TEST.DATAB)
+                .from(Tables.JSON_TEST)
+                .where(Tables.JSON_TEST.NAME.eq("null-json"))
+                .fetchOne()!!
+        assertEquals("null", r.value1().toString())
+    }
+}