Function executeTestCase

property-based-tests/executeTestCase.ts:69–149

(testCase: TestCase)

}

export function executeTestCase(testCase: TestCase) {
  const fs = require("fs-extra")

  function reportingFailures(f: () => void): void {
    try {
      f()
    } catch (e) {
      const data = JSON.stringify(testCase) + "\n\n"
      if (!existsSync("generative-test-errors.log")) {
        writeFileSync("generative-test-errors.log", data)
      } else {
        appendFileSync("generative-test-errors.log", data)
      }
      throw e
    }
  }

  const tmpDir = tmp.dirSync({ unsafeCleanup: true, mode: 0o100777 })

  spawnSafeSync("git", ["init"], { cwd: tmpDir.name })

  writeFiles(tmpDir.name, testCase.cleanFiles)

  spawnSafeSync("git", ["add", "-A"], { cwd: tmpDir.name })
  spawnSafeSync("git", ["commit", "--allow-empty", "-m", "blah"], {
    cwd: tmpDir.name,
  })
  if (Object.keys(testCase.cleanFiles).length > 0) {
    spawnSafeSync("git", ["rm", "-rf", "*"], {
      cwd: tmpDir.name,
    })
  }

  writeFiles(tmpDir.name, testCase.modifiedFiles)
  spawnSafeSync("git", ["add", "-A"], { cwd: tmpDir.name })

  const patchResult = spawnSafeSync(
    "git",
    ["diff", "--color=never", "--cached"],
    {
      cwd: tmpDir.name,
      logStdErrOnError: true,
      throwOnError: true,
    },
  )

  const patchFileContents = patchResult.stdout.toString()

  const patchFileContentsWithBlankLines = removeLeadingSpaceOnBlankLines(
    patchFileContents,
  )

  // skipping because we add source to the hunks now, so we need to strip that out before comparing
  it.skip("looks the same whether parsed with blank lines or not", () => {
    reportingFailures(() => {
      expect(parsePatchFile(patchFileContents)).toEqual(
        parsePatchFile(patchFileContentsWithBlankLines),
      )