forked from square/kotlinpoet
/
LambdaTypeNameTest.kt
130 lines (118 loc) · 3.99 KB
/
LambdaTypeNameTest.kt
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/*
* Copyright (C) 2017 Square, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.squareup.kotlinpoet
import com.google.common.truth.Truth.assertThat
import com.squareup.kotlinpoet.KModifier.VARARG
import javax.annotation.Nullable
import kotlin.test.Test
class LambdaTypeNameTest {
@Retention(AnnotationRetention.RUNTIME)
annotation class HasSomeAnnotation
@HasSomeAnnotation
inner class IsAnnotated
@Test fun receiverWithoutAnnotationHasNoParens() {
val typeName = LambdaTypeName.get(
Int::class.asClassName(),
listOf(),
Unit::class.asTypeName()
)
assertThat(typeName.toString()).isEqualTo("kotlin.Int.() -> kotlin.Unit")
}
@Test fun receiverWithAnnotationHasParens() {
val annotation = IsAnnotated::class.java.getAnnotation(HasSomeAnnotation::class.java)
val typeName = LambdaTypeName.get(
Int::class.asClassName().copy(
annotations = listOf(AnnotationSpec.get(annotation, includeDefaultValues = true))
),
listOf(),
Unit::class.asTypeName()
)
assertThat(typeName.toString()).isEqualTo(
"(@com.squareup.kotlinpoet.LambdaTypeNameTest.HasSomeAnnotation kotlin.Int).() -> kotlin.Unit"
)
}
@Test fun contextReceiver() {
val typeName = LambdaTypeName.get(
Int::class.asTypeName(),
listOf(STRING),
listOf(),
Unit::class.asTypeName()
)
assertThat(typeName.toString()).isEqualTo(
"context(kotlin.String) kotlin.Int.() -> kotlin.Unit"
)
}
@Test fun paramsWithAnnotationsForbidden() {
assertThrows<IllegalArgumentException> {
LambdaTypeName.get(
parameters = arrayOf(
ParameterSpec.builder("foo", Int::class)
.addAnnotation(Nullable::class)
.build()
),
returnType = Unit::class.asTypeName()
)
}.hasMessageThat().isEqualTo("Parameters with annotations are not allowed")
}
@Test fun paramsWithModifiersForbidden() {
assertThrows<IllegalArgumentException> {
LambdaTypeName.get(
parameters = arrayOf(
ParameterSpec.builder("foo", Int::class)
.addModifiers(VARARG)
.build()
),
returnType = Unit::class.asTypeName()
)
}.hasMessageThat().isEqualTo("Parameters with modifiers are not allowed")
}
@Test fun paramsWithDefaultValueForbidden() {
assertThrows<IllegalArgumentException> {
LambdaTypeName.get(
parameters = arrayOf(
ParameterSpec.builder("foo", Int::class)
.defaultValue("42")
.build()
),
returnType = Unit::class.asTypeName()
)
}.hasMessageThat().isEqualTo("Parameters with default values are not allowed")
}
@Test fun lambdaReturnType() {
val returnTypeName = LambdaTypeName.get(
parameters = arrayOf(Int::class.asTypeName()),
returnType = Unit::class.asTypeName()
)
val typeName = LambdaTypeName.get(
parameters = arrayOf(Int::class.asTypeName()),
returnType = returnTypeName
)
assertThat(typeName.toString())
.isEqualTo("(kotlin.Int) -> ((kotlin.Int) -> kotlin.Unit)")
}
@Test fun lambdaParameterType() {
val parameterTypeName = LambdaTypeName.get(
parameters = arrayOf(Int::class.asTypeName()),
returnType = Int::class.asTypeName()
)
val typeName = LambdaTypeName.get(
parameters = arrayOf(parameterTypeName),
returnType = Unit::class.asTypeName()
)
assertThat(typeName.toString())
.isEqualTo("((kotlin.Int) -> kotlin.Int) -> kotlin.Unit")
}
}