"prueba de fuego" meaning in Spanish

{
  "forms": [
    {
      "form": "pruebas de fuego",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "prueba de fuego f (plural pruebas de fuego)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "_dis": "69 10 21",
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "77 7 16",
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w+disamb"
        },
        {
          "_dis": "94 2 4",
          "kind": "other",
          "name": "Spanish entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w+disamb"
        }
      ],
      "examples": [
        {
          "ref": "2021 May 4, Carlos E. Cué, “Ayuso arrasa en Madrid”, in El País:",
          "text": "Ahora vendrá una gran prueba de fuego para comprobar cómo se hace ese equilibrio de poder interno entre Ayuso y Casado.",
          "type": "quote"
        }
      ],
      "glosses": [
        "litmus test, acid test"
      ],
      "id": "en-prueba_de_fuego-es-noun-SmNLYuHt",
      "links": [
        [
          "litmus test",
          "litmus test"
        ],
        [
          "acid test",
          "acid test"
        ]
      ],
      "tags": [
        "feminine"
      ]
    },
    {
      "glosses": [
        "ordeal"
      ],
      "id": "en-prueba_de_fuego-es-noun-M41OPdRQ",
      "links": [
        [
          "ordeal",
          "ordeal"
        ]
      ],
      "tags": [
        "feminine"
      ]
    },
    {
      "glosses": [
        "trial by fire"
      ],
      "id": "en-prueba_de_fuego-es-noun-oLpBODFe",
      "links": [
        [
          "trial by fire",
          "trial by fire"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "word": "prueba de fuego"
}

{
  "categories": [
    "Pages with 1 entry",
    "Pages with entries",
    "Spanish countable nouns",
    "Spanish entries with incorrect language header",
    "Spanish feminine nouns",
    "Spanish lemmas",
    "Spanish multiword terms",
    "Spanish nouns"
  ],
  "forms": [
    {
      "form": "pruebas de fuego",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "f"
      },
      "expansion": "prueba de fuego f (plural pruebas de fuego)",
      "name": "es-noun"
    }
  ],
  "lang": "Spanish",
  "lang_code": "es",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Requests for translations of Spanish quotations",
        "Spanish terms with quotations"
      ],
      "examples": [
        {
          "ref": "2021 May 4, Carlos E. Cué, “Ayuso arrasa en Madrid”, in El País:",
          "text": "Ahora vendrá una gran prueba de fuego para comprobar cómo se hace ese equilibrio de poder interno entre Ayuso y Casado.",
          "type": "quote"
        }
      ],
      "glosses": [
        "litmus test, acid test"
      ],
      "links": [
        [
          "litmus test",
          "litmus test"
        ],
        [
          "acid test",
          "acid test"
        ]
      ],
      "tags": [
        "feminine"
      ]
    },
    {
      "glosses": [
        "ordeal"
      ],
      "links": [
        [
          "ordeal",
          "ordeal"
        ]
      ],
      "tags": [
        "feminine"
      ]
    },
    {
      "glosses": [
        "trial by fire"
      ],
      "links": [
        [
          "trial by fire",
          "trial by fire"
        ]
      ],
      "tags": [
        "feminine"
      ]
    }
  ],
  "word": "prueba de fuego"
}