#592 : rebased main branch, added postgres JSON tests

QueryBuilder.Tests/PostgreSql/PostgresJsonTests.cs

@@ -0,0 +1,61 @@
+using SqlKata.Compilers;
+using SqlKata.Tests.Infrastructure;
+using System;
+using Xunit;
+
+namespace SqlKata.Tests.PostgreSql
+{
+    public class PostgresJsonTests : TestSupport
+    {
+        private readonly PostgresCompiler regularCompiler = new();
+        private readonly JsonAwarePostgresCompiler jsonCompatibleCompiler = new();
+
+        private class JsonAwarePostgresCompiler : PostgresCompiler
+        {
+            protected override string parameterPlaceholder { get; set; } = "¤";
+        }
+
+        [Fact]
+        public void LimitWithCustomPlaceHolder()
+        {
+            var query = new Query("test_table").Limit(10);
+            var result = jsonCompatibleCompiler.Compile(query);
+            Assert.Equal("""SELECT * FROM "test_table" LIMIT 10""", result.ToString());
+        }
+
+        [Fact]
+        public void RegularCompilerThrowsExceptionWhereRawJsonContainsQuestionMarkData()
+        {
+            Assert.Throws<IndexOutOfRangeException>(() =>
+            {
+                Query query = CreateQuestionMarkJsonQuery(out var rawCondition);
+                SqlResult result = regularCompiler.Compile(query);
+                Assert.Equal($"""SELECT * FROM "test_table" WHERE {rawCondition}""", result.ToString());
+            });
+        }
+
+        private Query CreateQuestionMarkJsonQuery(out string rawCondition)
+        {
+            rawCondition = "my_json_column @> '{\"json_param\" : \"question mark ? \"}'";
+            var escapedJsonCondition = rawCondition.Replace("{", "\\{").Replace("}", "\\}");
+            return new Query("test_table").WhereRaw(escapedJsonCondition);
+        }
+
+        [Fact]
+        public void WhereRawJsonWithQuestionMarkData()
+        {
+            Query query = CreateQuestionMarkJsonQuery(out var rawCondition);
+            SqlResult result = jsonCompatibleCompiler.Compile(query);
+            Assert.Equal($"""SELECT * FROM "test_table" WHERE {rawCondition}""", result.ToString());
+        }
+
+        [Fact]
+        public void UsingJsonArray()
+        {
+            var query = new Query("test_table").WhereRaw("[Json]->'address'->>'country' in (¤)", new[] { 1, 2, 3, 4 });
+            SqlResult result = jsonCompatibleCompiler.Compile(query);
+
+            Assert.Equal("""SELECT * FROM "test_table" WHERE "Json"->'address'->>'country' in (1,2,3,4)""", result.ToString());
+        }
+    }
+}