#!/bin/bash
#
# Copyright 2015 The Bazel Authors. 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.

set -eu

# Load the test setup defined in the parent directory
CURRENT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
source "${CURRENT_DIR}/../integration_test_setup.sh" \
  || { echo "integration_test_setup.sh not found!" >&2; exit 1; }

function test_java_test_coverage() {

  cat <<EOF > BUILD
java_test(
    name = "test",
    srcs = glob(["src/test/**/*.java"]),
    test_class = "com.example.TestCollatz",
    deps = [":collatz-lib"],
)

java_library(
    name = "collatz-lib",
    srcs = glob(["src/main/**/*.java"]),
)
EOF

  mkdir -p src/main/com/example
  cat <<EOF > src/main/com/example/Collatz.java
package com.example;

public class Collatz {

  public static int getCollatzFinal(int n) {
    if (n == 1) {
      return 1;
    }
    if (n % 2 == 0) {
      return getCollatzFinal(n / 2);
    } else {
      return getCollatzFinal(n * 3 + 1);
    }
  }

}
EOF

  mkdir -p src/test/com/example
  cat <<EOF > src/test/com/example/TestCollatz.java
package com.example;

import static org.junit.Assert.assertEquals;
import org.junit.Test;

public class TestCollatz {

  @Test
  public void testGetCollatzFinal() {
    assertEquals(Collatz.getCollatzFinal(1), 1);
    assertEquals(Collatz.getCollatzFinal(5), 1);
    assertEquals(Collatz.getCollatzFinal(10), 1);
    assertEquals(Collatz.getCollatzFinal(21), 1);
  }

}
EOF

  bazel coverage //:test &>$TEST_log || fail "Coverage for //:test failed"

  ending_part=$(sed -n -e '/PASSED/,$p' $TEST_log)
  coverage_file_path=$(grep -Eo "/[/a-zA-Z0-9\.\_\-]+\.dat$" <<< "$ending_part")
  [ -e $coverage_file_path ] || fail "Coverage output file not exists!"

  cat <<EOF > result.dat
SF:com/example/Collatz.java
FN:3,com/example/Collatz::<init> ()V
FNDA:0,com/example/Collatz::<init> ()V
FN:6,com/example/Collatz::getCollatzFinal (I)I
FNDA:1,com/example/Collatz::getCollatzFinal (I)I
BA:6,2
BA:6,2
BA:9,2
BA:9,2
DA:3,0
DA:6,3
DA:7,2
DA:9,4
DA:10,5
DA:12,7
end_of_record
EOF

  if ! cmp result.dat $coverage_file_path; then
    fail "Coverage output file is different with expected"
  fi
}

# TODO(#2227): Re-enable when the jacoco processor issue is fixed.
#run_suite "test tests"
