diff --git a/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/AbstractSerializationTest.kt b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/AbstractSerializationTest.kt
new file mode 100644
index 00000000000..953aa1b21f0
--- /dev/null
+++ b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/AbstractSerializationTest.kt
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2010-2022 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.
+ */
+
+package org.jetbrains.kotlin.kpm.idea.proto
+
+import org.jetbrains.kotlin.gradle.kpm.idea.serialize.IdeaKpmSerializationContext
+import org.jetbrains.kotlin.gradle.kpm.idea.testFixtures.TestIdeaKpmExtrasSerializationExtension
+import org.jetbrains.kotlin.gradle.kpm.idea.testFixtures.TestIdeaKpmSerializationLogger
+import kotlin.test.assertEquals
+
+abstract class AbstractSerializationTest<T : Any> : IdeaKpmSerializationContext {
+
+    final override val logger = TestIdeaKpmSerializationLogger()
+    final override val extrasSerializationExtension = TestIdeaKpmExtrasSerializationExtension
+
+    abstract fun serialize(value: T): ByteArray
+    abstract fun deserialize(data: ByteArray): T
+    open fun normalize(value: T): T = value
+
+    fun testSerialization(value: T) {
+        testSerializeAndDeserializeEquals(value)
+    }
+
+    private fun testSerializeAndDeserializeEquals(value: T) {
+        assertEquals(
+            normalize(value), deserialize(serialize(value))
+        )
+    }
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/BinaryCoordinatesTest.kt b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/BinaryCoordinatesTest.kt
new file mode 100644
index 00000000000..ea6665609f8
--- /dev/null
+++ b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/BinaryCoordinatesTest.kt
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2010-2022 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.
+ */
+
+package org.jetbrains.kotlin.kpm.idea.proto
+
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmBinaryCoordinates
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmBinaryCoordinatesImpl
+import org.junit.Test
+
+class BinaryCoordinatesTest : AbstractSerializationTest<IdeaKpmBinaryCoordinates>() {
+
+    override fun serialize(value: IdeaKpmBinaryCoordinates): ByteArray = value.toByteArray()
+    override fun deserialize(data: ByteArray): IdeaKpmBinaryCoordinates = IdeaKpmBinaryCoordinates(data)
+
+    @Test
+    fun `serialize - deserialize - sample 0`() = testSerialization(
+        IdeaKpmBinaryCoordinatesImpl(
+            group = "myGroup",
+            module = "myModule",
+            version = "myVersion",
+            kotlinModuleName = null,
+            kotlinFragmentName = null
+        )
+    )
+
+    @Test
+    fun `serialize - deserialize - sample 1`() = testSerialization(
+        IdeaKpmBinaryCoordinatesImpl(
+            group = "myGroup",
+            module = "myModule",
+            version = "myVersion",
+            kotlinModuleName = "myModuleName",
+            kotlinFragmentName = null
+        )
+    )
+
+    @Test
+    fun `serialize - deserialize - sample 2`() = testSerialization(
+        IdeaKpmBinaryCoordinatesImpl(
+            group = "myGroup",
+            module = "myModule",
+            version = "myVersion",
+            kotlinModuleName = null,
+            kotlinFragmentName = "myFragmentName"
+        )
+    )
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/CompilationOutputTest.kt b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/CompilationOutputTest.kt
new file mode 100644
index 00000000000..882439c5ced
--- /dev/null
+++ b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/CompilationOutputTest.kt
@@ -0,0 +1,30 @@
+/*
+ * Copyright 2010-2022 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.
+ */
+
+package org.jetbrains.kotlin.kpm.idea.proto
+
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmCompilationOutput
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmCompilationOutputImpl
+import org.jetbrains.kotlin.gradle.kpm.idea.testFixtures.TestIdeaKpmInstances
+import kotlin.test.Test
+
+class CompilationOutputTest : AbstractSerializationTest<IdeaKpmCompilationOutput>() {
+
+    override fun serialize(value: IdeaKpmCompilationOutput): ByteArray = value.toByteArray()
+    override fun deserialize(data: ByteArray): IdeaKpmCompilationOutput = IdeaKpmCompilationOutput(data)
+
+    @Test
+    fun `serialize - deserialize - sample 0`() {
+        testSerialization(TestIdeaKpmInstances.simpleCompilationOutput)
+    }
+
+    @Test
+    fun `serialize - deserialize - sample 1`() = testSerialization(
+        IdeaKpmCompilationOutputImpl(
+            classesDirs = emptySet(),
+            resourcesDir = null
+        )
+    )
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/ContainerTest.kt b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/ContainerTest.kt
new file mode 100644
index 00000000000..371918ca6b5
--- /dev/null
+++ b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/ContainerTest.kt
@@ -0,0 +1,45 @@
+/*
+ * Copyright 2010-2022 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.
+ */
+
+package org.jetbrains.kotlin.kpm.idea.proto
+
+import org.jetbrains.kotlin.gradle.kpm.idea.serialize.IdeaKpmSerializationContext
+import org.jetbrains.kotlin.gradle.kpm.idea.testFixtures.TestIdeaKpmExtrasSerializationExtension
+import org.jetbrains.kotlin.gradle.kpm.idea.testFixtures.TestIdeaKpmInstances
+import org.jetbrains.kotlin.gradle.kpm.idea.testFixtures.TestIdeaKpmSerializationLogger
+import kotlin.test.Test
+import kotlin.test.assertEquals
+import kotlin.test.assertNull
+import kotlin.test.assertTrue
+
+class ContainerTest : IdeaKpmSerializationContext {
+    override val logger = TestIdeaKpmSerializationLogger()
+    override val extrasSerializationExtension = TestIdeaKpmExtrasSerializationExtension
+
+    @Test
+    fun `deserialize - with too high major version - returns null`() {
+        val data = ideaKpmContainerProto {
+            schemaVersionMajor = IdeaKpmProtoSchema.versionMajor + 1
+            schemaVersionMinor = IdeaKpmProtoSchema.versionMinor
+            schemaVersionPatch = IdeaKpmProtoSchema.versionPatch
+        }.toByteArray()
+
+        assertTrue(logger.reports.isEmpty(), "Expected no reports in logger")
+        assertNull(IdeaKpmProject(data))
+        assertTrue(logger.reports.isNotEmpty(), "Expected at least one report in logger")
+    }
+
+    @Test
+    fun `deserialize - with lower major version - returns object`() {
+        val data = ideaKpmContainerProto {
+            schemaVersionMajor = IdeaKpmProtoSchema.versionMajor - 1
+            schemaVersionMinor = IdeaKpmProtoSchema.versionMinor
+            schemaVersionPatch = IdeaKpmProtoSchema.versionPatch
+            project = IdeaKpmProjectProto(TestIdeaKpmInstances.simpleProject)
+        }.toByteArray()
+
+        assertEquals(TestIdeaKpmInstances.simpleProject, IdeaKpmProject(data))
+    }
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/ExtrasTest.kt b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/ExtrasTest.kt
new file mode 100644
index 00000000000..6d544ff5c35
--- /dev/null
+++ b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/ExtrasTest.kt
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2010-2022 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.
+ */
+
+package org.jetbrains.kotlin.kpm.idea.proto
+
+import org.jetbrains.kotlin.tooling.core.*
+import kotlin.test.Test
+
+class ExtrasTest : AbstractSerializationTest<Extras>() {
+
+    override fun serialize(value: Extras): ByteArray = IdeaKpmExtrasProto(value).toByteArray()
+    override fun deserialize(data: ByteArray): Extras = Extras(IdeaKpmExtrasProto.parseFrom(data))
+    override fun normalize(value: Extras): Extras = value.filter { (_, value) -> value !is Ignored }.toExtras()
+
+    class Ignored
+
+    @Test
+    fun `serialize - deserialize - sample 0`() {
+
+        val extras = mutableExtrasOf(
+            extrasKeyOf<String>() withValue "myValue",
+            extrasKeyOf<String>("a") withValue "myValueA",
+            extrasKeyOf<Int>() withValue 2411,
+            extrasKeyOf<Ignored>() withValue Ignored()
+        )
+
+        testSerialization(extras)
+    }
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/FragmentCoordinatesTest.kt b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/FragmentCoordinatesTest.kt
new file mode 100644
index 00000000000..f8e6843a08e
--- /dev/null
+++ b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/FragmentCoordinatesTest.kt
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2010-2022 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.
+ */
+
+package org.jetbrains.kotlin.kpm.idea.proto
+
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmFragmentCoordinates
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmFragmentCoordinatesImpl
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmModuleCoordinatesImpl
+import org.junit.Test
+
+class FragmentCoordinatesTest : AbstractSerializationTest<IdeaKpmFragmentCoordinates>() {
+
+    override fun serialize(value: IdeaKpmFragmentCoordinates) = value.toByteArray()
+
+    override fun deserialize(data: ByteArray) = IdeaKpmFragmentCoordinates(data)
+
+    @Test
+    fun `serialize - deserialize - sample 0`() = testSerialization(
+        IdeaKpmFragmentCoordinatesImpl(
+            module = IdeaKpmModuleCoordinatesImpl(
+                buildId = "buildId",
+                projectPath = "projectPath",
+                projectName = "projectName",
+                moduleName = "moduleName",
+                moduleClassifier = null
+            ),
+            fragmentName = "myFragmentName"
+        )
+    )
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/FragmentDependencyTest.kt b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/FragmentDependencyTest.kt
new file mode 100644
index 00000000000..5c7d9814fe1
--- /dev/null
+++ b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/FragmentDependencyTest.kt
@@ -0,0 +1,69 @@
+/*
+ * Copyright 2010-2022 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.
+ */
+
+package org.jetbrains.kotlin.kpm.idea.proto
+
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmFragmentCoordinatesImpl
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmFragmentDependency
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmFragmentDependencyImpl
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmModuleCoordinatesImpl
+import org.jetbrains.kotlin.gradle.kpm.idea.serialize.IdeaKpmSerializationContext
+import org.jetbrains.kotlin.tooling.core.extrasKeyOf
+import org.jetbrains.kotlin.tooling.core.extrasOf
+import org.jetbrains.kotlin.tooling.core.withValue
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class FragmentDependencyTest : AbstractSerializationTest<IdeaKpmFragmentDependency>() {
+
+    override fun serialize(value: IdeaKpmFragmentDependency) = value.toByteArray(this)
+
+    override fun deserialize(data: ByteArray) = IdeaKpmFragmentDependency(data)
+
+    private val coordinates = IdeaKpmFragmentCoordinatesImpl(
+        module = IdeaKpmModuleCoordinatesImpl(
+            buildId = "buildId",
+            projectPath = "projectPath",
+            projectName = "projectName",
+            moduleName = "moduleName",
+            moduleClassifier = "moduleClassifier"
+        ),
+        fragmentName = "fragmentName"
+    )
+
+    @Test
+    fun `serialize - deserialize - sample 0`() = testSerialization(
+        IdeaKpmFragmentDependencyImpl(
+            type = IdeaKpmFragmentDependency.Type.Regular,
+            coordinates = coordinates
+        )
+    )
+
+    @Test
+    fun `serialize - deserialize - sample 1`() = testSerialization(
+        IdeaKpmFragmentDependencyImpl(
+            type = IdeaKpmFragmentDependency.Type.Refines,
+            coordinates = coordinates
+        )
+    )
+
+
+    @Test
+    fun `serialize - deserialize - sample 2`() = testSerialization(
+        IdeaKpmFragmentDependencyImpl(
+            type = IdeaKpmFragmentDependency.Type.Friend,
+            coordinates = coordinates
+        )
+    )
+
+    @Test
+    fun `serialize - deserialize - sample 3`() = testSerialization(
+        IdeaKpmFragmentDependencyImpl(
+            type = IdeaKpmFragmentDependency.Type.Regular,
+            coordinates = coordinates,
+            extras = extrasOf(extrasKeyOf<String>() withValue "myStringExtras")
+        )
+    )
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/FragmentTest.kt b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/FragmentTest.kt
new file mode 100644
index 00000000000..18a87146d10
--- /dev/null
+++ b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/FragmentTest.kt
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2010-2022 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.
+ */
+
+package org.jetbrains.kotlin.kpm.idea.proto
+
+import org.jetbrains.kotlin.gradle.kpm.idea.*
+import org.jetbrains.kotlin.gradle.kpm.idea.testFixtures.TestIdeaKpmInstances
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class FragmentTest : AbstractSerializationTest<IdeaKpmFragment>() {
+    override fun serialize(value: IdeaKpmFragment) = value.toByteArray(this)
+    override fun deserialize(data: ByteArray) = IdeaKpmFragment(data)
+
+    @Test
+    fun `serialize - deserialize - sample 0`() {
+        testDeserializedEquals(TestIdeaKpmInstances.simpleFragment)
+    }
+
+    @Test
+    fun `serialize - deserialize - sample 1`() {
+        testDeserializedEquals(TestIdeaKpmInstances.fragmentWithExtras)
+    }
+
+    private fun testDeserializedEquals(value: IdeaKpmFragmentImpl) {
+        val deserialized = IdeaKpmFragment(value.toByteArray(this))
+        val normalized = value.copy(
+            dependencies = value.dependencies.map {
+                if (it !is IdeaKpmResolvedBinaryDependency) return@map it
+                IdeaKpmResolvedBinaryDependencyImpl(
+                    coordinates = it.coordinates,
+                    binaryType = it.binaryType,
+                    binaryFile = it.binaryFile.absoluteFile,
+                    extras = it.extras
+                )
+            },
+            languageSettings = (value.languageSettings as IdeaKpmLanguageSettingsImpl).copy(
+                compilerPluginClasspath = value.languageSettings.compilerPluginClasspath.map { it.absoluteFile }
+            ),
+            sourceDirectories = value.sourceDirectories
+                .map { it as IdeaKpmSourceDirectoryImpl }
+                .map { it.copy(file = it.file.absoluteFile) }
+        )
+
+        assertEquals(normalized, deserialized)
+    }
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/LanguageSettingsTest.kt b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/LanguageSettingsTest.kt
new file mode 100644
index 00000000000..55529782a85
--- /dev/null
+++ b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/LanguageSettingsTest.kt
@@ -0,0 +1,57 @@
+/*
+ * Copyright 2010-2022 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.
+ */
+
+package org.jetbrains.kotlin.kpm.idea.proto
+
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmLanguageSettings
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmLanguageSettingsImpl
+import java.io.File
+import kotlin.test.Test
+
+class LanguageSettingsTest : AbstractSerializationTest<IdeaKpmLanguageSettings>() {
+
+    override fun serialize(value: IdeaKpmLanguageSettings): ByteArray {
+        return value.toByteArray()
+    }
+
+    override fun deserialize(data: ByteArray): IdeaKpmLanguageSettings {
+        return IdeaKpmLanguageSettings(data)
+    }
+
+    override fun normalize(value: IdeaKpmLanguageSettings): IdeaKpmLanguageSettings {
+        value as IdeaKpmLanguageSettingsImpl
+        return value.copy(
+            compilerPluginClasspath = value.compilerPluginClasspath.map { it.absoluteFile }
+        )
+    }
+
+    @Test
+    fun `serialize - deserialize - sample 0`() = testSerialization(
+        IdeaKpmLanguageSettingsImpl(
+            languageVersion = "1.3",
+            apiVersion = "1.4",
+            isProgressiveMode = false,
+            enabledLanguageFeatures = setOf("some.feature.1"),
+            optInAnnotationsInUse = setOf("some.opt.in", "some.other.opt.in"),
+            compilerPluginArguments = listOf("my.argument"),
+            compilerPluginClasspath = listOf(File("classpath")),
+            freeCompilerArgs = listOf("free.compiler.arg.1", "free.compiler.arg.2")
+        )
+    )
+
+    @Test
+    fun `serialize - deserialize - sample 1`() = testSerialization(
+        IdeaKpmLanguageSettingsImpl(
+            languageVersion = null,
+            apiVersion = "1.7",
+            isProgressiveMode = true,
+            enabledLanguageFeatures = emptySet(),
+            optInAnnotationsInUse = emptySet(),
+            compilerPluginArguments = emptyList(),
+            compilerPluginClasspath = emptyList(),
+            freeCompilerArgs = emptyList()
+        )
+    )
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/ModuleCoordinatesTest.kt b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/ModuleCoordinatesTest.kt
new file mode 100644
index 00000000000..fefb8e2b846
--- /dev/null
+++ b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/ModuleCoordinatesTest.kt
@@ -0,0 +1,31 @@
+/*
+ * Copyright 2010-2022 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.
+ */
+
+package org.jetbrains.kotlin.kpm.idea.proto
+
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmModuleCoordinates
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmModuleCoordinatesImpl
+import org.jetbrains.kotlin.gradle.kpm.idea.testFixtures.TestIdeaKpmInstances
+import kotlin.test.Test
+
+class ModuleCoordinatesTest : AbstractSerializationTest<IdeaKpmModuleCoordinates>() {
+
+    override fun serialize(value: IdeaKpmModuleCoordinates) = value.toByteArray()
+    override fun deserialize(data: ByteArray) = IdeaKpmModuleCoordinates(data)
+
+    @Test
+    fun `serialize - deserialize - sample 0`() = testSerialization(TestIdeaKpmInstances.simpleModuleCoordinates)
+
+    @Test
+    fun `serialize - deserialize - sample 1`() = testSerialization(
+        IdeaKpmModuleCoordinatesImpl(
+            buildId = "myBuildId",
+            projectPath = "myProjectPath",
+            projectName = "myProjectName",
+            moduleName = "myModuleName",
+            moduleClassifier = null
+        )
+    )
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/ModuleTest.kt b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/ModuleTest.kt
new file mode 100644
index 00000000000..f6a8788fec2
--- /dev/null
+++ b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/ModuleTest.kt
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2010-2022 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.
+ */
+
+package org.jetbrains.kotlin.kpm.idea.proto
+
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmModule
+import org.jetbrains.kotlin.gradle.kpm.idea.testFixtures.TestIdeaKpmInstances
+import kotlin.test.Test
+
+class ModuleTest : AbstractSerializationTest<IdeaKpmModule>() {
+
+    override fun serialize(value: IdeaKpmModule): ByteArray {
+        return value.toByteArray(this)
+    }
+
+    override fun deserialize(data: ByteArray): IdeaKpmModule {
+        return IdeaKpmModule(data)
+    }
+
+    @Test
+    fun `serialize - deserialize - sample 0`() = testSerialization(TestIdeaKpmInstances.simpleModule)
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/PlatformTest.kt b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/PlatformTest.kt
new file mode 100644
index 00000000000..4d976e7b936
--- /dev/null
+++ b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/PlatformTest.kt
@@ -0,0 +1,61 @@
+/*
+ * Copyright 2010-2022 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.
+ */
+
+package org.jetbrains.kotlin.kpm.idea.proto
+
+import org.jetbrains.kotlin.gradle.kpm.idea.*
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class PlatformTest : AbstractSerializationTest<IdeaKpmPlatform>() {
+
+    override fun serialize(value: IdeaKpmPlatform): ByteArray {
+        return IdeaKpmPlatformProto(value).toByteArray()
+    }
+
+    override fun deserialize(data: ByteArray): IdeaKpmPlatform {
+        return IdeaKpmPlatform(IdeaKpmPlatformProto.parseFrom(data))
+    }
+
+    @Test
+    fun `serialize - deserialize - jvm`() {
+        val value = IdeaKpmJvmPlatformImpl("jvmTarget")
+        assertEquals(value, IdeaKpmJvmPlatform(value.toByteArray(this)))
+        assertEquals(value, IdeaKpmPlatform(IdeaKpmPlatformProto(value)))
+        testSerialization(value)
+    }
+
+    @Test
+    fun `serialize - deserialize - native`() {
+        val value = IdeaKpmNativePlatformImpl("konanTarget")
+        assertEquals(value, IdeaKpmNativePlatform(value.toByteArray(this)))
+        assertEquals(value, IdeaKpmPlatform(IdeaKpmPlatformProto(value)))
+        testSerialization(value)
+    }
+
+    @Test
+    fun `serialize - deserialize - js`() {
+        val value = IdeaKpmJsPlatformImpl(true)
+        assertEquals(value, IdeaKpmJsPlatform(value.toByteArray(this)))
+        assertEquals(value, IdeaKpmPlatform(IdeaKpmPlatformProto(value)))
+        testSerialization(value)
+    }
+
+    @Test
+    fun `serialize - deserialize - wasm`() {
+        val value = IdeaKpmWasmPlatformImpl()
+        assertEquals(value, IdeaKpmWasmPlatform(value.toByteArray(this)))
+        assertEquals(value, IdeaKpmPlatform(IdeaKpmPlatformProto(value)))
+        testSerialization(value)
+    }
+
+    @Test
+    fun `serialize - deserialize - unknown`() {
+        val value = IdeaKpmUnknownPlatformImpl()
+        assertEquals(value, IdeaKpmUnknownPlatform(value.toByteArray(this)))
+        assertEquals(value, IdeaKpmPlatform(IdeaKpmPlatformProto(value)))
+        testSerialization(value)
+    }
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/ProjectTest.kt b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/ProjectTest.kt
new file mode 100644
index 00000000000..584f5d981f6
--- /dev/null
+++ b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/ProjectTest.kt
@@ -0,0 +1,24 @@
+/*
+ * Copyright 2010-2022 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.
+ */
+
+package org.jetbrains.kotlin.kpm.idea.proto
+
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmProject
+import org.jetbrains.kotlin.gradle.kpm.idea.testFixtures.TestIdeaKpmInstances
+import kotlin.test.Test
+
+class ProjectTest : AbstractSerializationTest<IdeaKpmProject>() {
+
+    override fun serialize(value: IdeaKpmProject): ByteArray {
+        return value.toByteArray(this)
+    }
+
+    override fun deserialize(data: ByteArray): IdeaKpmProject {
+        return IdeaKpmProject(data) ?: error("Failed to deserialize kpm project: ${logger.reports}")
+    }
+
+    @Test
+    fun `serialize - deserialize - sample 0`() = testSerialization(TestIdeaKpmInstances.simpleProject)
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/ResolvedBinaryDependencyTest.kt b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/ResolvedBinaryDependencyTest.kt
new file mode 100644
index 00000000000..d7ee330f8c4
--- /dev/null
+++ b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/ResolvedBinaryDependencyTest.kt
@@ -0,0 +1,49 @@
+/*
+ * Copyright 2010-2022 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.
+ */
+
+package org.jetbrains.kotlin.kpm.idea.proto
+
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmBinaryCoordinatesImpl
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmResolvedBinaryDependency
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmResolvedBinaryDependencyImpl
+import org.jetbrains.kotlin.gradle.kpm.idea.serialize.IdeaKpmSerializationContext
+import org.jetbrains.kotlin.tooling.core.emptyExtras
+import org.jetbrains.kotlin.tooling.core.extrasKeyOf
+import org.jetbrains.kotlin.tooling.core.extrasOf
+import org.jetbrains.kotlin.tooling.core.withValue
+import java.io.File
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class ResolvedBinaryDependencyTest : AbstractSerializationTest<IdeaKpmResolvedBinaryDependency>() {
+
+    override fun serialize(value: IdeaKpmResolvedBinaryDependency) = value.toByteArray(this)
+    override fun deserialize(data: ByteArray) = IdeaKpmResolvedBinaryDependency(data)
+    override fun normalize(value: IdeaKpmResolvedBinaryDependency) =
+        value.run { this as IdeaKpmResolvedBinaryDependencyImpl }.copy(binaryFile = value.binaryFile.absoluteFile)
+
+    @Test
+    fun `serialize - deserialize - sample 0`() = testSerialization(
+        IdeaKpmResolvedBinaryDependencyImpl(
+            null, binaryType = "binaryType", binaryFile = File("bin"), emptyExtras()
+        )
+    )
+
+    @Test
+    fun `serialize - deserialize - sample 1`() = testSerialization(
+        IdeaKpmResolvedBinaryDependencyImpl(
+            coordinates = IdeaKpmBinaryCoordinatesImpl(
+                group = "group",
+                module = "module",
+                version = "version",
+                kotlinModuleName = null,
+                kotlinFragmentName = null
+            ),
+            binaryType = "binaryType",
+            binaryFile = File("bin"),
+            extras = extrasOf(extrasKeyOf<Int>() withValue 2411)
+        )
+    )
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/SourceDirectoryTest.kt b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/SourceDirectoryTest.kt
new file mode 100644
index 00000000000..509abac44e1
--- /dev/null
+++ b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/SourceDirectoryTest.kt
@@ -0,0 +1,37 @@
+/*
+ * Copyright 2010-2022 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.
+ */
+
+package org.jetbrains.kotlin.kpm.idea.proto
+
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmSourceDirectory
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmSourceDirectoryImpl
+import org.jetbrains.kotlin.gradle.kpm.idea.serialize.IdeaKpmSerializationContext
+import org.jetbrains.kotlin.tooling.core.emptyExtras
+import org.jetbrains.kotlin.tooling.core.extrasKeyOf
+import org.jetbrains.kotlin.tooling.core.extrasOf
+import org.jetbrains.kotlin.tooling.core.withValue
+import org.junit.Test
+import java.io.File
+import kotlin.test.assertEquals
+
+class SourceDirectoryTest : AbstractSerializationTest<IdeaKpmSourceDirectory>() {
+
+    override fun serialize(value: IdeaKpmSourceDirectory) = value.toByteArray(this)
+    override fun deserialize(data: ByteArray) = IdeaKpmSourceDirectory(data)
+
+    @Test
+    fun `serialize - deserialize - sample 0`() = testSerialization(
+        IdeaKpmSourceDirectoryImpl(
+            File("myFile").absoluteFile, type = "myType", extras = emptyExtras()
+        )
+    )
+
+    @Test
+    fun `serialize - deserialize - sample 1`() = testSerialization(
+        IdeaKpmSourceDirectoryImpl(
+            File("myFile").absoluteFile, type = "myType", extras = extrasOf(extrasKeyOf<Int>() withValue 1)
+        )
+    )
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/UnresolvedBinaryDependencyTest.kt b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/UnresolvedBinaryDependencyTest.kt
new file mode 100644
index 00000000000..b244435b825
--- /dev/null
+++ b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/UnresolvedBinaryDependencyTest.kt
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2010-2022 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.
+ */
+
+package org.jetbrains.kotlin.kpm.idea.proto
+
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmBinaryCoordinatesImpl
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmUnresolvedBinaryDependency
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmUnresolvedBinaryDependencyImpl
+import org.jetbrains.kotlin.gradle.kpm.idea.serialize.IdeaKpmSerializationContext
+import org.jetbrains.kotlin.tooling.core.emptyExtras
+import org.jetbrains.kotlin.tooling.core.extrasKeyOf
+import org.jetbrains.kotlin.tooling.core.extrasOf
+import org.jetbrains.kotlin.tooling.core.withValue
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class UnresolvedBinaryTest : AbstractSerializationTest<IdeaKpmUnresolvedBinaryDependency>() {
+
+    override fun serialize(value: IdeaKpmUnresolvedBinaryDependency) = value.toByteArray(this)
+    override fun deserialize(data: ByteArray) = IdeaKpmUnresolvedBinaryDependency(data)
+
+    @Test
+    fun `serialize - deserialize - sample 0`() = testSerialization(
+        IdeaKpmUnresolvedBinaryDependencyImpl(
+            null, null, emptyExtras()
+        )
+    )
+
+    @Test
+    fun `serialize - deserialize - sample 1`() = testSerialization(
+        IdeaKpmUnresolvedBinaryDependencyImpl(
+            "1", IdeaKpmBinaryCoordinatesImpl(
+                group = "group",
+                module = "module",
+                version = "version",
+                kotlinModuleName = null,
+                kotlinFragmentName = null
+            ), emptyExtras()
+        )
+    )
+
+    @Test
+    fun `serialize - deserialize - sample 2`() = testSerialization(
+        IdeaKpmUnresolvedBinaryDependencyImpl(
+            null, null, extrasOf(extrasKeyOf<String>() withValue "myExtraValue")
+        )
+    )
+
+}
diff --git a/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/VariantTest.kt b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/VariantTest.kt
new file mode 100644
index 00000000000..5952c0a7e14
--- /dev/null
+++ b/libraries/tools/kotlin-gradle-plugin-idea-proto/src/test/kotlin/org/jetbrains/kotlin/kpm/idea/proto/VariantTest.kt
@@ -0,0 +1,26 @@
+/*
+ * Copyright 2010-2022 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.
+ */
+
+package org.jetbrains.kotlin.kpm.idea.proto
+
+import org.jetbrains.kotlin.gradle.kpm.idea.IdeaKpmVariant
+import org.jetbrains.kotlin.gradle.kpm.idea.testFixtures.TestIdeaKpmInstances
+import kotlin.test.Test
+
+class VariantTest : AbstractSerializationTest<IdeaKpmVariant>() {
+
+    override fun serialize(value: IdeaKpmVariant) = value.toByteArray(this)
+    override fun deserialize(data: ByteArray) = IdeaKpmVariant(data)
+
+    @Test
+    fun `serialize - deserialize - sample 0`() {
+        testSerialization(TestIdeaKpmInstances.simpleVariant)
+    }
+
+    @Test
+    fun `serialize - deserialize - sample 1`() {
+        testSerialization(TestIdeaKpmInstances.variantWithExtras)
+    }
+}