#!/bin/sh

\. ../../../nvm.sh
\. ../../generated_semvers.sh

# This test suite validates the behavior of extracting the semver from a package.json's engine.node value given valid/invalid semvers and valid/invalid json structures.

# (TEST 1 POSITIVE TEST CASES)
# SEMVERS: valid
# PACKAGE.JSON TEMPLATES: invalid
test_cases="$VALID_SEMVERS_FOR_PKG_JSON"
if [ -z "$test_cases" ]; then
  die 'TEST 1 for nvm_get_node_from_pkg_json given an empty set of test cases'
fi
prev_semver=''
for template_file_name in package_json_templates/_valid_*; do
  while [ -n "$test_cases" ]; do
    semver=$(echo "$test_cases" | head -n1)
    test_cases=$(echo "$test_cases" | tail -n +2)
    [ -n "$semver" ] || continue
    expectedOutput=$(nvm_trim_and_reduce_whitespace_to_one_space "$semver")

    if [ "$prev_semver" = "$semver" ]; then
      die "Problem iterating through test_cases (TEST 1). Encountered the same value twice in a row. prev_semver='$prev_semver' semver='$semver'.\n"
    fi
    prev_semver="$semver"

    pkg_json_contents=$(sed "s/NODE_SEMVER/$semver/g" "$template_file_name" | tail -n +3)
    actual_output=$(nvm_get_node_from_pkg_json "$pkg_json_contents")
    if [ "$actual_output" != "$expectedOutput" ] || [ -z "$actual_output" ] || [ -z "$pkg_json_contents" ]; then
      die "'nvm_get_node_from_pkg_json' POSITIVE test case failed (TEST 1). Expected '$expectedOutput' but got '$actual_output' when given input '$semver' and template '$template_file_name':\n$pkg_json_contents"
    fi
  done
done

# (TEST 2 NEGATIVE TEST CASES)
# SEMVERS: valid
# PACKAGE.JSON TEMPLATES: invalid
test_cases="$VALID_SEMVERS_FOR_PKG_JSON"
if [ -z "$test_cases" ]; then
  die 'TEST 2 for nvm_get_node_from_pkg_json given an empty set of test cases'
fi
prev_semver=''
for template_file_name in package_json_templates/_invalid_*; do
  while [ -n "$test_cases" ]; do
    semver=$(echo "$test_cases" | head -n1)
    test_cases=$(echo "$test_cases" | tail -n +2)
    [ -n "$semver" ] || continue

    if [ "$prev_semver" = "$semver" ]; then
      die "Problem iterating through test_cases (TEST 2). Encountered the same value twice in a row. prev_semver='$prev_semver' semver='$semver'.\n"
    fi
    prev_semver="$semver"

    pkg_json_contents=$(sed "s/NODE_SEMVER/$semver/g" "$template_file_name" | tail -n +3)
    actual_output=$(nvm_get_node_from_pkg_json "$pkg_json_contents")
    if [ "$actual_output" != "" ] || [ -z "$semver" ] || [ -z "$pkg_json_contents" ]; then
      die "'nvm_get_node_from_pkg_json' NEGATIVE test case failed (TEST 2). Expected to get empty string but got '$actual_output' when given input template '$template_file_name':\n$pkg_json_contents"
    fi
  done
done


# (TEST 3 NEGATIVE TEST CASES)
# SEMVERS: invalid
# PACKAGE.JSON TEMPLATES: valid
test_cases="$INVALID_SEMVERS_FOR_PKG_JSON"
if [ -z "$test_cases" ]; then
  die 'TEST 3 for nvm_get_node_from_pkg_json given an empty set of test cases'
fi
prev_semver=''
for template_file_name in package_json_templates/_valid_*; do
  while [ -n "$test_cases" ]; do
    semver=$(echo "$test_cases" | head -n1)
    [ -n "$semver" ] || continue
    test_cases=$(echo "$test_cases" | tail -n +2)

    if [ "$prev_semver" = "$semver" ]; then
      die "Problem iterating through test_cases (TEST 3). Encountered the same value twice in a row. prev_semver='$prev_semver' semver='$semver'.\n"
    fi
    prev_semver="$semver"

    pkg_json_contents=$(sed "s/NODE_SEMVER/$semver/g" "$template_file_name" | tail -n +3)
    actual_output=$(nvm_get_node_from_pkg_json "$pkg_json_contents")
    if [ "$actual_output" != "" ] || [ -z "$semver" ] || [ -z "$pkg_json_contents" ]; then
      die "'nvm_get_node_from_pkg_json' NEGATIVE test case failed (TEST 3). Expected to get empty string but got '$actual_output' when given input template '$template_file_name':\n$pkg_json_contents"
    fi
  done
done

# (TEST 4 NEGATIVE TEST CASES)
# SEMVERS: invalid
# PACKAGE.JSON TEMPLATES: invalid
test_cases="$INVALID_SEMVERS_FOR_PKG_JSON"
if [ -z "$test_cases" ]; then
  die 'TEST 4 for nvm_get_node_from_pkg_json given an empty set of test cases'
fi
prev_semver=''
for template_file_name in package_json_templates/_invalid_*; do
  while [ -n "$test_cases" ]; do
    semver=$(echo "$test_cases" | head -n1)
    [ -n "$semver" ] || continue
    test_cases=$(echo "$test_cases" | tail -n +2)

    if [ "$prev_semver" = "$semver" ]; then
      die "Problem iterating through test_cases (TEST 4). Encountered the same value twice in a row. prev_semver='$prev_semver' semver='$semver'.\n"
    fi
    prev_semver="$semver"

    pkg_json_contents=$(sed "s/NODE_SEMVER/$semver/g" "$template_file_name" | tail -n +3)
    actual_output=$(nvm_get_node_from_pkg_json "$pkg_json_contents")
    if [ "$actual_output" != "" ] || [ -z "$semver" ] || [ -z "$pkg_json_contents" ]; then
      die "'nvm_get_node_from_pkg_json' NEGATIVE test case failed (TEST 4). Expected to get empty string but got '$actual_output' when given input template '$template_file_name':\n$pkg_json_contents"
    fi
  done
done
exit 0