[LL] add tests for FirDeclarationForCompiledElementSearcher

build stub if was not able to load:
expected that in IDE stubs would always be found in the index, for tests -
build from virtual file

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/enumEntry.kt

@@ -0,0 +1,4 @@
+// DECLARATION_TYPE: org.jetbrains.kotlin.psi.KtEnumEntry
+enum class FooBar {
+    Baz;
+}

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/enumEntry.txt

@@ -0,0 +1,8 @@
+KT element: KtEnumEntry
+KT element text:
+Baz;
+FIR element: FirEnumEntryImpl
+FIR source kind: KtRealSourceElementKind
+
+FIR element rendered:
+public final static [ResolvedTo(BODY_RESOLVE)] enum entry Baz: R|FooBar|

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/functionWithDefinitelyNotNullParameter.kt

@@ -0,0 +1,4 @@
+// DECLARATION_TYPE: org.jetbrains.kotlin.psi.KtNamedFunction
+class FooBar {
+    fun <T> functionWithTAndAnyValue(otherVal: T & Any) {}
+}

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/functionWithDefinitelyNotNullParameter.txt

@@ -0,0 +1,8 @@
+KT element: KtNamedFunction
+KT element text:
+public final fun <T> functionWithTAndAnyValue(otherVal: T & Any): kotlin.Unit { /* compiled code */ }
+FIR element: FirSimpleFunctionImpl
+FIR source kind: KtRealSourceElementKind
+
+FIR element rendered:
+public final [ResolvedTo(BODY_RESOLVE)] fun <[ResolvedTo(BODY_RESOLVE)] T> functionWithTAndAnyValue([ResolvedTo(BODY_RESOLVE)] otherVal: R|T & Any|): R|kotlin/Unit|

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/parameter.kt

@@ -0,0 +1,2 @@
+// DECLARATION_TYPE: org.jetbrains.kotlin.psi.KtParameter
+fun doSmth(p: String) {}

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/parameter.txt

@@ -0,0 +1,8 @@
+KT element: KtParameter
+KT element text:
+p: kotlin.String
+FIR element: FirValueParameterImpl
+FIR source kind: KtRealSourceElementKind
+
+FIR element rendered:
+[ResolvedTo(BODY_RESOLVE)] p: R|kotlin/String|

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/secondaryConstructor.kt

@@ -0,0 +1,10 @@
+// DECLARATION_TYPE: org.jetbrains.kotlin.psi.KtConstructor
+class FooBar {
+    val p: String
+
+    constructor(p: String) {
+        this.p = p
+    }
+
+    fun doSmth() {}
+}

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/secondaryConstructor.txt

@@ -0,0 +1,8 @@
+KT element: KtSecondaryConstructor
+KT element text:
+public constructor(p: kotlin.String) { /* compiled code */ }
+FIR element: FirConstructorImpl
+FIR source kind: KtRealSourceElementKind
+
+FIR element rendered:
+public [ResolvedTo(BODY_RESOLVE)] constructor([ResolvedTo(BODY_RESOLVE)] p: R|kotlin/String|): R|FooBar|

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/simpleClass.kt

@@ -0,0 +1,4 @@
+// DECLARATION_TYPE: org.jetbrains.kotlin.psi.KtClass
+class FooBar {
+    fun doSmth() {}
+}

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/simpleClass.txt

@@ -0,0 +1,15 @@
+KT element: KtClass
+KT element text:
+public final class FooBar public constructor() {
+    public final fun doSmth(): kotlin.Unit { /* compiled code */ }
+}
+FIR element: FirRegularClassImpl
+FIR source kind: KtRealSourceElementKind
+
+FIR element rendered:
+public final [ResolvedTo(BODY_RESOLVE)] class FooBar : R|kotlin/Any| {
+    public final [ResolvedTo(BODY_RESOLVE)] fun doSmth(): R|kotlin/Unit|
+
+    public [ResolvedTo(BODY_RESOLVE)] constructor(): R|FooBar|
+
+}

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/simpleConstructor.kt

@@ -0,0 +1,4 @@
+// DECLARATION_TYPE: org.jetbrains.kotlin.psi.KtConstructor
+class FooBar(val p: String) {
+    fun doSmth() {}
+}

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/simpleConstructor.txt

@@ -0,0 +1,8 @@
+KT element: KtPrimaryConstructor
+KT element text:
+public constructor(p: kotlin.String)
+FIR element: FirPrimaryConstructor
+FIR source kind: KtRealSourceElementKind
+
+FIR element rendered:
+public [ResolvedTo(BODY_RESOLVE)] constructor([ResolvedTo(BODY_RESOLVE)] p: R|kotlin/String|): R|FooBar|

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/simpleFunction.kt

@@ -0,0 +1,4 @@
+// DECLARATION_TYPE: org.jetbrains.kotlin.psi.KtNamedFunction
+object FooBar {
+    fun doSmth() {}
+}

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/simpleFunction.txt

@@ -0,0 +1,8 @@
+KT element: KtNamedFunction
+KT element text:
+public final fun doSmth(): kotlin.Unit { /* compiled code */ }
+FIR element: FirSimpleFunctionImpl
+FIR source kind: KtRealSourceElementKind
+
+FIR element rendered:
+public final [ResolvedTo(BODY_RESOLVE)] fun doSmth(): R|kotlin/Unit|

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/simpleProperty.kt

@@ -0,0 +1,10 @@
+// DECLARATION_TYPE: org.jetbrains.kotlin.psi.KtProperty
+class FooBar {
+    val p: String
+
+    constructor(p: String) {
+        this.p = p
+    }
+
+    fun doSmth() {}
+}

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/simpleProperty.txt

@@ -0,0 +1,8 @@
+KT element: KtProperty
+KT element text:
+public final val p: kotlin.String /* compiled code */
+FIR element: FirPropertyImpl
+FIR source kind: KtRealSourceElementKind
+
+FIR element rendered:
+public final [ResolvedTo(BODY_RESOLVE)] val p: R|kotlin/String|

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/topLevelFunction.kt

@@ -0,0 +1,2 @@
+// DECLARATION_TYPE: org.jetbrains.kotlin.psi.KtNamedFunction
+fun doSmth() {}

analysis/low-level-api-fir/testdata/getOrBuildFirBinary/topLevelFunction.txt

@@ -0,0 +1,8 @@
+KT element: KtNamedFunction
+KT element text:
+public fun doSmth(): kotlin.Unit { /* compiled code */ }
+FIR element: FirSimpleFunctionImpl
+FIR source kind: KtRealSourceElementKind
+
+FIR element rendered:
+public final [ResolvedTo(BODY_RESOLVE)] fun doSmth(): R|kotlin/Unit|

analysis/low-level-api-fir/testdata/getOrBuildFirForStdLib/emptyArray.kt

@@ -0,0 +1,8 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+// WITH_STDLIB
+
+val d = empty<caret>Array<String>()

analysis/low-level-api-fir/testdata/getOrBuildFirForStdLib/emptyArray.txt

@@ -0,0 +1,6 @@
+KT element: KtNamedFunction
+FIR element: FirSimpleFunctionImpl
+FIR source kind: KtRealSourceElementKind
+
+FIR element rendered:
+public final inline [ResolvedTo(BODY_RESOLVE)] fun <@R|kotlin/internal/PureReifiable|() reified [ResolvedTo(BODY_RESOLVE)] T> emptyArray(): R|kotlin/Array<T>|

analysis/low-level-api-fir/testdata/getOrBuildFirForStdLib/flattenArray.kt

@@ -0,0 +1,8 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+// WITH_STDLIB
+
+val d = arrayOf(arrayOf("1", "2")).fla<caret>tten()

analysis/low-level-api-fir/testdata/getOrBuildFirForStdLib/flattenArray.txt

@@ -0,0 +1,6 @@
+KT element: KtNamedFunction
+FIR element: FirSimpleFunctionImpl
+FIR source kind: KtRealSourceElementKind
+
+FIR element rendered:
+public final [ResolvedTo(BODY_RESOLVE)] fun <[ResolvedTo(BODY_RESOLVE)] T> R|kotlin/Array<out kotlin/Array<out T>>|.flatten(): R|kotlin/collections/List<T>|

analysis/low-level-api-fir/testdata/getOrBuildFirForStdLib/fromBits.kt

@@ -0,0 +1,8 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+// WITH_STDLIB
+
+val d = Double.from<caret>Bits(0x400921fb54442d18L)

analysis/low-level-api-fir/testdata/getOrBuildFirForStdLib/fromBits.txt

@@ -0,0 +1,6 @@
+KT element: KtNamedFunction
+FIR element: FirSimpleFunctionImpl
+FIR source kind: KtRealSourceElementKind
+
+FIR element rendered:
+@R|kotlin/SinceKotlin|(version = String(1.2)) @R|kotlin/internal/InlineOnly|() public final inline [ResolvedTo(BODY_RESOLVE)] fun @RECEIVER:R|kotlin/SinceKotlin|(version = String(1.2)) @RECEIVER:R|kotlin/internal/InlineOnly|() R|kotlin/Double.Companion|.fromBits([ResolvedTo(BODY_RESOLVE)] bits: R|kotlin/Long|): R|kotlin/Double|