Add test for extension properties declaration in IR

compiler/testData/ir/irText/declarations/extensionProperties.kt

@@ -0,0 +1,13 @@
+val String.test1 get() = 42
+
+var String.test2
+    get() = 42
+    set(value) {}
+
+class Host {
+    val String.test3 get() = 42
+
+    var String.test4
+        get() = 42
+        set(value) {}
+}

compiler/testData/ir/irText/declarations/extensionProperties.txt

@@ -0,0 +1,49 @@
+FILE fqName:<root> fileName:/extensionProperties.kt
+  PROPERTY name:test1 type:kotlin.Int visibility:public modality:FINAL flags:val
+    FUN name:<get-test1> visibility:public modality:FINAL <> ($receiver:kotlin.String) returnType:Int flags:
+      $receiver: VALUE_PARAMETER name:<this> type:kotlin.String flags:
+      BLOCK_BODY
+        RETURN type=kotlin.Nothing from='<get-test1>() on String: Int'
+          CONST Int type=kotlin.Int value=42
+  PROPERTY name:test2 type:kotlin.Int visibility:public modality:FINAL flags:var
+    FUN name:<get-test2> visibility:public modality:FINAL <> ($receiver:kotlin.String) returnType:Int flags:
+      $receiver: VALUE_PARAMETER name:<this> type:kotlin.String flags:
+      BLOCK_BODY
+        RETURN type=kotlin.Nothing from='<get-test2>() on String: Int'
+          CONST Int type=kotlin.Int value=42
+    FUN name:<set-test2> visibility:public modality:FINAL <> ($receiver:kotlin.String, value:kotlin.Int) returnType:Unit flags:
+      $receiver: VALUE_PARAMETER name:<this> type:kotlin.String flags:
+      VALUE_PARAMETER name:value index:0 type:kotlin.Int flags:
+      BLOCK_BODY
+  CLASS CLASS name:Host modality:FINAL visibility:public flags:
+    $this: VALUE_PARAMETER INSTANCE_RECEIVER name:<this> type:Host flags:
+    CONSTRUCTOR visibility:public <> () returnType:Host flags:
+      BLOCK_BODY
+        DELEGATING_CONSTRUCTOR_CALL 'constructor Any()'
+        INSTANCE_INITIALIZER_CALL classDescriptor='Host'
+    PROPERTY name:test3 type:kotlin.Int visibility:public modality:FINAL flags:val
+      FUN name:<get-test3> visibility:public modality:FINAL <> ($this:Host, $receiver:kotlin.String) returnType:Int flags:
+        $this: VALUE_PARAMETER name:<this> type:Host flags:
+        $receiver: VALUE_PARAMETER name:<this> type:kotlin.String flags:
+        BLOCK_BODY
+          RETURN type=kotlin.Nothing from='<get-test3>() on String: Int'
+            CONST Int type=kotlin.Int value=42
+    PROPERTY name:test4 type:kotlin.Int visibility:public modality:FINAL flags:var
+      FUN name:<get-test4> visibility:public modality:FINAL <> ($this:Host, $receiver:kotlin.String) returnType:Int flags:
+        $this: VALUE_PARAMETER name:<this> type:Host flags:
+        $receiver: VALUE_PARAMETER name:<this> type:kotlin.String flags:
+        BLOCK_BODY
+          RETURN type=kotlin.Nothing from='<get-test4>() on String: Int'
+            CONST Int type=kotlin.Int value=42
+      FUN name:<set-test4> visibility:public modality:FINAL <> ($this:Host, $receiver:kotlin.String, value:kotlin.Int) returnType:Unit flags:
+        $this: VALUE_PARAMETER name:<this> type:Host flags:
+        $receiver: VALUE_PARAMETER name:<this> type:kotlin.String flags:
+        VALUE_PARAMETER name:value index:0 type:kotlin.Int flags:
+        BLOCK_BODY
+    FUN FAKE_OVERRIDE name:equals visibility:public modality:OPEN <> ($this:kotlin.Any, other:kotlin.Any?) returnType:Boolean flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+      VALUE_PARAMETER name:other index:0 type:kotlin.Any? flags:
+    FUN FAKE_OVERRIDE name:hashCode visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:Int flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:
+    FUN FAKE_OVERRIDE name:toString visibility:public modality:OPEN <> ($this:kotlin.Any) returnType:String flags:
+      $this: VALUE_PARAMETER name:<this> type:kotlin.Any flags:

compiler/tests/org/jetbrains/kotlin/ir/IrTextTestCaseGenerated.java

@@ -252,6 +252,12 @@ public class IrTextTestCaseGenerated extends AbstractIrTextTestCase {
             doTest(fileName);
         }
 
+        @TestMetadata("extensionProperties.kt")
+        public void testExtensionProperties() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/ir/irText/declarations/extensionProperties.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("fakeOverrides.kt")
         public void testFakeOverrides() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("compiler/testData/ir/irText/declarations/fakeOverrides.kt");