add %eof{ test to bazel test suite

javatests/jflex/testcase/eof/BUILD.bazel

@@ -0,0 +1,43 @@
+# This build file was generated automatically, but won't be re-generated.
+# Feel free to improve.
+
+load("@jflex_rules//jflex:jflex.bzl", "jflex")
+
+# eof
+
+jflex(
+    name = "gen_eof_scanner",
+    srcs = ["eof.flex"],
+    jflex_bin = "//jflex:jflex_bin",
+    outputs = ["Eof.java"],
+)
+
+java_library(
+    name = "eof_scanner",
+    srcs = [
+        ":gen_eof_scanner",
+    ],
+    deps = [
+        "//java/jflex/testing/testsuite/golden",
+        "//third_party/com/google/guava",
+    ],
+)
+
+java_test(
+    name = "EofGoldenTest",
+    srcs = [
+        "EofGoldenTest.java",
+    ],
+    data = [
+        "eof-0.input",
+        "eof-0.output",
+    ],
+    deps = [
+        ":eof_scanner",
+        "//java/jflex/testing/diff",
+        "//java/jflex/testing/testsuite/golden",
+        "//java/jflex/util/scanner:scanner_factory",
+        "//third_party/com/google/guava",
+        "//third_party/com/google/truth",
+    ],
+)

javatests/jflex/testcase/eof/EofGoldenTest.java

@@ -0,0 +1,40 @@
+// test: eof
+
+package jflex.testcase.eof;
+
+import java.io.File;
+import jflex.testing.testsuite.golden.AbstractGoldenTest;
+import jflex.testing.testsuite.golden.GoldenInOutFilePair;
+import jflex.util.scanner.ScannerFactory;
+import org.junit.Test;
+
+/**
+ * test %eof and %eofthrows directives https://github.com/jflex-de/jflex/issues/743
+ *
+ * <p>Note: This test was generated from {@code jflex-testsuite-maven-plugin} test cases. The test
+ * relies on golden files for testing, expecting the scanner to output logs on the {@code
+ * System.out}. Please migrate to proper unit tests, as describe in <a
+ * href="https://github.com/jflex-de/jflex/tree/master/javatests/jflex/testcase">
+ * //javatest/jflex/testcase</a>.
+ */
+// TODO Migrate this test to proper unit tests.
+public class EofGoldenTest extends AbstractGoldenTest {
+
+  /** Creates a scanner conforming to the {@code eof.flex} specification. */
+  private final ScannerFactory<Eof> scannerFactory = ScannerFactory.of(Eof::new);
+
+  private File testRuntimeDir = new File("javatests/jflex/testcase/eof");
+
+  @Test
+  public void goldenTest0() throws Exception {
+    GoldenInOutFilePair golden =
+        new GoldenInOutFilePair(
+            new File(testRuntimeDir, "eof-0.input"), new File(testRuntimeDir, "eof-0.output"));
+    compareSystemOutWith(golden);
+
+    Eof scanner = scannerFactory.createScannerForFile(golden.inputFile);
+    while (!scanner.yyatEOF()) {
+      System.out.println(scanner.yylex());
+    }
+  }
+}

javatests/jflex/testcase/eof/eof-0.input

@@ -0,0 +1,2 @@
+bla
+blub

javatests/jflex/testcase/eof/eof-0.output

@@ -0,0 +1,2 @@
+EOF
+<<EOF>>

javatests/jflex/testcase/eof/eof.flex

@@ -0,0 +1,29 @@
+package jflex.testcase.eof;
+
+import java.io.*;
+
+%%
+
+%public
+%class Eof
+%type String
+
+%eof{
+  System.out.println("EOF");
+
+  // should never throw, but the compiler won't know
+  if (System.out == null) {
+    throw new java.io.IOException("testing");
+  }
+%eof}
+
+%eofthrow{
+   java.io.IOException
+%eofthrow}
+
+%%
+
+.+  { /* ignore */ }
+\n  { /* that too */ }
+
+<<EOF>> { System.out.println("<<EOF>>"); return ""; }