1 files changed, 105 insertions, 0 deletions
diff --git a/javatests/com/google/turbine/lower/LongStringIntegrationTest.java b/javatests/com/google/turbine/lower/LongStringIntegrationTest.java
new file mode 100644
index 0000000..a462b69
--- /dev/null
+++ b/javatests/com/google/turbine/lower/LongStringIntegrationTest.java
@@ -0,0 +1,105 @@
+/*
+ * Copyright 2021 Google Inc. All Rights Reserved.
+ *
+ * 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.turbine.lower;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import com.google.common.collect.ImmutableList;
+import com.google.common.collect.ImmutableMap;
+import java.io.IOException;
+import java.io.UncheckedIOException;
+import java.nio.file.Path;
+import java.util.HashMap;
+import java.util.Map;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.rules.TemporaryFolder;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+import org.objectweb.asm.ClassReader;
+import org.objectweb.asm.ClassVisitor;
+import org.objectweb.asm.FieldVisitor;
+import org.objectweb.asm.Opcodes;
+
+@RunWith(JUnit4.class)
+public class LongStringIntegrationTest {
+
+  @Rule public final TemporaryFolder temporaryFolder = new TemporaryFolder();
+
+  @Test
+  public void test() throws Exception {
+    Map<String, byte[]> output =
+        runTurbineWithStack(
+            /* stackSize= */ 1,
+            /* input= */ ImmutableMap.of("Test.java", source()),
+            /* classpath= */ ImmutableList.of());
+
+    assertThat(output.keySet()).containsExactly("Test");
+    String result = fieldValue(output.get("Test"));
+    assertThat(result).startsWith("...");
+    assertThat(result).hasLength(10000);
+  }
+
+  private static Map<String, byte[]> runTurbineWithStack(
+      int stackSize, ImmutableMap<String, String> input, ImmutableList<Path> classpath)
+      throws InterruptedException {
+    Map<String, byte[]> output = new HashMap<>();
+    Thread t =
+        new Thread(
+            /* group= */ null,
+            () -> {
+              try {
+                output.putAll(IntegrationTestSupport.runTurbine(input, classpath));
+              } catch (IOException e) {
+                throw new UncheckedIOException(e);
+              }
+            },
+            /* name= */ "turbine",
+            stackSize);
+    t.run();
+    t.join();
+    return output;
+  }
+
+  /** Extract the string value of a constant field from the class file. */
+  private static String fieldValue(byte[] classFile) {
+    String[] result = {null};
+    new ClassReader(classFile)
+        .accept(
+            new ClassVisitor(Opcodes.ASM9) {
+              @Override
+              public FieldVisitor visitField(
+                  int access, String name, String desc, String signature, Object value) {
+                result[0] = (String) value;
+                return null;
+              }
+            },
+            0);
+    return result[0];
+  }
+
+  /** Create a source file with a long concatenated string literal: {@code "" + "." + "." + ...}. */
+  private static String source() {
+    StringBuilder input = new StringBuilder();
+    input.append("class Test { public static final String C = \"\"");
+    for (int i = 0; i < 10000; i++) {
+      input.append("+ \".\"\n");
+    }
+    input.append("; }");
+    return input.toString();
+  }
+}