[J2KT] Add unit test for Names.kt.

PiperOrigin-RevId: 585977184

transpiler/javatests/com/google/j2cl/transpiler/backend/kotlin/BUILD

@@ -0,0 +1,26 @@
+load("//testing/build_defs:junit_test_suites.bzl", "junit_test_suites")
+load("@io_bazel_rules_kotlin//kotlin:kotlin.bzl", "kt_jvm_library")
+
+package(
+    default_applicable_licenses = ["//:j2cl_license"],
+    licenses = ["notice"],
+)
+
+kt_jvm_library(
+    name = "tests",
+    testonly = 1,
+    srcs = [
+        "NamesTest.kt",
+    ],
+    deps = [
+        "//third_party:junit",
+        "//third_party:truth",
+        "//transpiler/java/com/google/j2cl/transpiler/backend/kotlin",
+    ],
+)
+
+junit_test_suites(
+    name = "junit",
+    sizes = ["small"],
+    deps = [":tests"],
+)

transpiler/javatests/com/google/j2cl/transpiler/backend/kotlin/NamesTest.kt

@@ -0,0 +1,47 @@
+/*
+ * Copyright 2023 Google 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
+ *
+ * http://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.google.j2cl.transpiler.backend.kotlin
+
+import com.google.common.truth.Truth.assertThat
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+
+@RunWith(JUnit4::class)
+class NamesTest {
+  @Test
+  fun stringQualifiedNameComponents() {
+    assertThat("Foo".qualifiedNameComponents()).containsExactly("Foo").inOrder()
+    assertThat("Foo.Bar".qualifiedNameComponents()).containsExactly("Foo", "Bar").inOrder()
+    assertThat("Foo.Bar.Zoo".qualifiedNameComponents())
+      .containsExactly("Foo", "Bar", "Zoo")
+      .inOrder()
+  }
+
+  @Test
+  fun stringQualifiedNameToSimpleName() {
+    assertThat("Foo".qualifiedNameToSimpleName()).isEqualTo("Foo")
+    assertThat("Foo.Bar".qualifiedNameToSimpleName()).isEqualTo("Bar")
+    assertThat("Foo.Bar.Zoo".qualifiedNameToSimpleName()).isEqualTo("Zoo")
+  }
+
+  @Test
+  fun stringQualifiedNameToAlias() {
+    assertThat("Foo".qualifiedNameToAlias()).isEqualTo("Foo")
+    assertThat("Foo.Bar".qualifiedNameToAlias()).isEqualTo("Foo_Bar")
+    assertThat("Foo.Bar.Zoo".qualifiedNameToAlias()).isEqualTo("Foo_Bar_Zoo")
+  }
+}