assertFailsWith<IllegalArgumentException> {
      Headers.Builder()
        .addUnsafeNonAscii("héader1", "value1")
        .build()
    }.also { expected ->
      assertThat(expected.message).isEqualTo("Unexpected char 0xe9 at 1 in header name: héader1")
    }
  }

  @Test fun addUnsafeNonAsciiAcceptsUnicodeValue() {
    val headers =
      Headers.Builder()
        .addUnsafeNonAscii("header1", "valué1")
        .build()

  @JvmStatic
  fun headerEntries(vararg elements: String?): List<Header> {
    return List(elements.size / 2) { Header(elements[it * 2]!!, elements[it * 2 + 1]!!) }
  }

  @JvmStatic
  fun repeat(
    c: Char,
    count: Int,
  ): String {
    val array = CharArray(count)
    Arrays.fill(array, c)
    return String(array)
  }

  /**

    val name = truncateName(subprojects.joinToString(","))

    private fun truncateName(str: String) =
        // Can't exceed Linux file name limit 255 char on TeamCity
        if (str.length > 200) {
            str.substring(0, 200) + "..."
        } else {
            str
        }

            type.isBoolean -> KtConstantValue.KtBooleanConstantValue(value as Boolean, expression)
            type.isChar -> KtConstantValue.KtCharConstantValue((value as? Char) ?: (value as Number).toInt().toChar(), expression)
            type.isByte -> KtConstantValue.KtByteConstantValue((value as Number).toByte(), expression)

    override val BOOLEAN: KtType
        get() = withValidityAssertion { analysisContext.builtIns.booleanType.toKtType(analysisContext) }

    override val CHAR: KtType
        get() = withValidityAssertion { analysisContext.builtIns.charType.toKtType(analysisContext) }

    override val STRING: KtType

            // In most cases, we can get the callee name from the callee's candidate symbols. However, there is at least one case where we
            // cannot do so:
            // ```
            // fun x(c: Char) {}
            // fun call(x: kotlin.Int) {
            //   operator fun Int.invoke(a: Int) {}
            //   operator fun Int.invoke(b: Boolean) {}
            //   <expr>x()</expr>
            // }

      assertThat(expected.message).isEqualTo("Unexpected char 0x20 at 1 in header name: a b")
    }
  }

  @Test
  fun requestHeaderNameWithTabForbidden() {
    assertFailsWith<IllegalArgumentException> {
      Request.Builder().addHeader("a\tb", "c")
    }.also { expected ->
      assertThat(expected.message).isEqualTo("Unexpected char 0x09 at 1 in header name: a\tb")
    }
  }

  @Test

      pos: Int,
      limit: Int,
    ): Int {
      if (limit - pos < 2) return -1

      val c0 = input[pos]
      if ((c0 < 'a' || c0 > 'z') && (c0 < 'A' || c0 > 'Z')) return -1 // Not a scheme start char.

      characters@ for (i in pos + 1 until limit) {
        return when (input[i]) {
          // Scheme character. Keep going.
          in 'a'..'z', in 'A'..'Z', in '0'..'9', '+', '-', '.' -> continue@characters

- [`KT-59718`](https://youtrack.jetbrains.com/issue/KT-59718) K/JS: Concatenating a String with a Char can lead to boxing of the Char
- [`KT-59717`](https://youtrack.jetbrains.com/issue/KT-59717) K/JS: a redundant boxing of a returned Char from an inline function

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