[FIR-TEST] Add test for problem with += and java synthetic property

compiler/fir/resolve/testData/resolve/problems/propertyFromJavaPlusAssign.kt

@@ -0,0 +1,22 @@
+/*
+ * Here we desugar b.text += "" into b.text = b.text + ""
+ *                                    ^1       ^2
+ * Problem is that += resolve expects that (2) will be resolved to
+ *   property symbol, but for java synthetics b.text resolves
+ *   to function `getText()`
+ */
+
+// FILE: B.java
+
+public class B {
+    public void setText(String text) {}
+    public String getText() {
+        return ""
+    }
+}
+
+// FILE: main.kt
+
+fun test(b: B) {
+    b.<!VARIABLE_EXPECTED!>text<!> += ""
+}

compiler/fir/resolve/testData/resolve/problems/propertyFromJavaPlusAssign.txt

@@ -0,0 +1,4 @@
+FILE: main.kt
+    public final fun test(b: R|B|): R|kotlin/Unit| {
+        <Variable expected># = R|<local>/b|.R|/B.text|.R|kotlin/String.plus|(String())
+    }

compiler/fir/resolve/tests/org/jetbrains/kotlin/fir/FirDiagnosticsTestGenerated.java

@@ -771,6 +771,24 @@ public class FirDiagnosticsTestGenerated extends AbstractFirDiagnosticsTest {
         }
     }
 
+    @TestMetadata("compiler/fir/resolve/testData/resolve/problems")
+    @TestDataPath("$PROJECT_ROOT")
+    @RunWith(JUnit3RunnerWithInners.class)
+    public static class Problems extends AbstractFirDiagnosticsTest {
+        private void runTest(String testDataFilePath) throws Exception {
+            KotlinTestUtils.runTest(this::doTest, this, testDataFilePath);
+        }
+
+        public void testAllFilesPresentInProblems() throws Exception {
+            KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/fir/resolve/testData/resolve/problems"), Pattern.compile("^([^.]+)\\.kt$"), true);
+        }
+
+        @TestMetadata("propertyFromJavaPlusAssign.kt")
+        public void testPropertyFromJavaPlusAssign() throws Exception {
+            runTest("compiler/fir/resolve/testData/resolve/problems/propertyFromJavaPlusAssign.kt");
+        }
+    }
+
     @TestMetadata("compiler/fir/resolve/testData/resolve/references")
     @TestDataPath("$PROJECT_ROOT")
     @RunWith(JUnit3RunnerWithInners.class)