FIR: Add tests for invoke

compiler/fir/resolve/testData/resolve/expresssions/invoke/explicitReceiver.kt

@@ -0,0 +1,13 @@
+
+fun x() {
+
+}
+
+class Foo {
+
+    val x: Foo = Foo()
+
+    operator fun invoke(): Foo { return this }
+
+    fun bar() = x() // Should resolve to invoke
+}

compiler/fir/resolve/testData/resolve/expresssions/invoke/explicitReceiver.txt

@@ -0,0 +1,18 @@
+FILE: explicitReceiver.kt
+    public final function x(): R|kotlin/Unit| {
+    }
+    public final class Foo {
+        public constructor(): super<R|kotlin/Any|>()
+
+        public final property x(val): R|Foo| = <Unresolved name: Foo>#()
+            public get(): R|Foo|
+
+        public final operator function invoke(): R|Foo| {
+            return@@@invoke this#
+        }
+
+        public final function bar(): R|Foo| {
+            return@@@bar R|/Foo.x|.R|/Foo.invoke|()
+        }
+
+    }

compiler/fir/resolve/testData/resolve/expresssions/invoke/explicitReceiver2.kt

@@ -0,0 +1,19 @@
+
+class Bar {
+    operator fun invoke(): Foo { return this }
+
+}
+
+fun x() {
+
+}
+
+class Foo {
+
+
+    operator fun Bar.invoke(): Foo { return this }
+
+    val x: Bar = Bar()
+
+    fun bar() = x() // Should resolve to invoke
+}

compiler/fir/resolve/testData/resolve/expresssions/invoke/explicitReceiver2.txt

@@ -0,0 +1,26 @@
+FILE: explicitReceiver2.kt
+    public final class Bar {
+        public constructor(): super<R|kotlin/Any|>()
+
+        public final operator function invoke(): R|Foo| {
+            return@@@invoke this#
+        }
+
+    }
+    public final function x(): R|kotlin/Unit| {
+    }
+    public final class Foo {
+        public constructor(): super<R|kotlin/Any|>()
+
+        public final operator function invoke R|Bar|.(): R|Foo| {
+            return@@@invoke this#
+        }
+
+        public final property x(val): R|Bar| = <Unresolved name: Bar>#()
+            public get(): R|Bar|
+
+        public final function bar(): R|Foo| {
+            return@@@bar R|/Foo.x|.R|/Bar.invoke|()
+        }
+
+    }

compiler/fir/resolve/testData/resolve/expresssions/invoke/extension.kt

@@ -0,0 +1,11 @@
+
+
+fun x() {}
+
+class Foo {
+    operator fun Int.invoke(): Foo = this@Foo
+
+    val x = 0
+
+    fun foo() = x()
+}

compiler/fir/resolve/testData/resolve/expresssions/invoke/extension.txt

@@ -0,0 +1,18 @@
+FILE: extension.kt
+    public final function x(): R|kotlin/Unit| {
+    }
+    public final class Foo {
+        public constructor(): super<R|kotlin/Any|>()
+
+        public final operator function invoke R|kotlin/Int|.(): R|Foo| {
+            return@@@invoke this@Foo
+        }
+
+        public final property x(val): R|kotlin/Int| = Int(0)
+            public get(): <implicit>
+
+        public final function foo(): R|Foo| {
+            return@@@foo R|/Foo.x|.R|/Foo.invoke|()
+        }
+
+    }

compiler/fir/resolve/testData/resolve/expresssions/invoke/farInvokeExtension.kt

@@ -0,0 +1,12 @@
+
+
+fun x() {}
+
+operator fun Int.invoke(): Foo = this@Foo
+
+class Foo {
+
+    val x = 0
+
+    fun foo() = x()
+}

compiler/fir/resolve/testData/resolve/expresssions/invoke/farInvokeExtension.txt

@@ -0,0 +1,17 @@
+FILE: farInvokeExtension.kt
+    public final function x(): R|kotlin/Unit| {
+    }
+    public final operator function invoke R|kotlin/Int|.(): R|Foo| {
+        return@@@invoke this@Foo
+    }
+    public final class Foo {
+        public constructor(): super<R|kotlin/Any|>()
+
+        public final property x(val): R|kotlin/Int| = Int(0)
+            public get(): <implicit>
+
+        public final function foo(): R|kotlin/Unit| {
+            return@@@foo R|/x|()
+        }
+
+    }

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

@@ -168,6 +168,39 @@ public class FirResolveTestCaseGenerated extends AbstractFirResolveTestCase {
         public void testWhen() throws Exception {
             runTest("compiler/fir/resolve/testData/resolve/expresssions/when.kt");
         }
+
+        @TestMetadata("compiler/fir/resolve/testData/resolve/expresssions/invoke")
+        @TestDataPath("$PROJECT_ROOT")
+        @RunWith(JUnit3RunnerWithInners.class)
+        public static class Invoke extends AbstractFirResolveTestCase {
+            private void runTest(String testDataFilePath) throws Exception {
+                KotlinTestUtils.runTest(this::doTest, TargetBackend.ANY, testDataFilePath);
+            }
+
+            public void testAllFilesPresentInInvoke() throws Exception {
+                KotlinTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("compiler/fir/resolve/testData/resolve/expresssions/invoke"), Pattern.compile("^([^.]+)\\.kt$"), TargetBackend.ANY, true);
+            }
+
+            @TestMetadata("explicitReceiver.kt")
+            public void testExplicitReceiver() throws Exception {
+                runTest("compiler/fir/resolve/testData/resolve/expresssions/invoke/explicitReceiver.kt");
+            }
+
+            @TestMetadata("explicitReceiver2.kt")
+            public void testExplicitReceiver2() throws Exception {
+                runTest("compiler/fir/resolve/testData/resolve/expresssions/invoke/explicitReceiver2.kt");
+            }
+
+            @TestMetadata("extension.kt")
+            public void testExtension() throws Exception {
+                runTest("compiler/fir/resolve/testData/resolve/expresssions/invoke/extension.kt");
+            }
+
+            @TestMetadata("farInvokeExtension.kt")
+            public void testFarInvokeExtension() throws Exception {
+                runTest("compiler/fir/resolve/testData/resolve/expresssions/invoke/farInvokeExtension.kt");
+            }
+        }
     }
 
     @TestMetadata("compiler/fir/resolve/testData/resolve/fromBuilder")