Update Mocha and use new max diff option

[mattseddon]

Following on from this update in Mocha: mochajs/mocha#4799. This is an attempt at improving the usefulness of the output produced by our Mocha test suite.

The following test:

    it.only('should produce a massive diff', async () => {
      const fun = cloneDeep(staticPlotsFixture)
      delete fun.plots['logs/loss.tsv']

      expect(fun).to.deep.equal(staticPlotsFixture)
    })

Previously produced:

Test
     1) should produce a massive diff:

      AssertionError: expected { Object (plots, sectionName, ...) } to deeply equal { Object (plots, sectionName, ...) }
      + expected - actual

And now produces this output:

Test
     1) should produce a massive diff

  0 passing (2s)

  1 failing

  1) Plots Test Suite
       Plots
         should produce a massive diff:

      AssertionError: expected { Object (plots, sectionName, ...) } to deeply equal { Object (plots, sectionName, ...) }
      + expected - actual

               ]
               "type": "vega"
             }
           ]
      +    "logs/loss.tsv": [
      +      {
      +        "content": {
      +          "$schema": "https://vega.github.io/schema/vega-lite/v4.json"
      +          "data": {
      +            "values": [
      +              {
      +                "loss": "2.298783302307129"
      +                "rev": "workspace"
      +                "step": "0"
      +                "timestamp": "1641966224600"
      +              }
      +              {
      +                "loss": "2.2779736518859863"
      +                "rev": "workspace"
      +                "step": "1"
      +                "timestamp": "1641966239108"
      +              }
      +              {
      +                "loss": "2.2572131156921387"
      +                "rev": "workspace"
      +                "step": "2"
      +                "timestamp": "1641966253176"
      +              }
      +              {
      +                "loss": "2.238112688064575"
      +                "rev": "workspace"
      +                "step": "3"
      +                "timestamp": "1641966267354"
      +              }
      +              {
      +                "loss": "2.212251901626587"
      +                "rev": "workspace"
      +                "step": "4"
      +                "timestamp": "1641966285745"
      +              }
      +              {
      +                "loss": "2.1894900798797607"
      +                "rev": "workspace"
      +                "step": "5"
      +                "timestamp": "1641966303339"
      +              }
      +              {
      +                "loss": "2.165510654449463"
      +                "rev": "workspace"
      +                "step": "6"
      +                "timestamp": "1641966320693"
      +              }
      +              {
      +                "loss": "2.135964870452881"
      +                "rev": "workspace"
      +                "step": "7"
      +                "timestamp": "1641966335781"
      +              }
      +              {
      +                "loss": "2.114135265350342"
      +                "rev": "workspace"
      +                "step": "8"
      +                "timestamp": "1641966351758"
      +              }
      +              {
      +                "loss": "2.298783302307129"
      +                "rev": "main"
      +                "step": "0"
      +                "timestamp": "1641966224600"
      +              }
      +              {
      +                "loss": "2.2779736518859863"
      +                "rev": "main"
      +                "step": "1"
      +                "timestamp": "1641966239108"
      +              }
      +              {
      +                "loss": "2.2572131156921387"
      +                "rev": "main"
      +                "step": "2"
      +                "timestamp": "1641966253176"
      +              }
      +              {
      +                "loss": "2.238112688064575"
      +                "rev": "main"
      +                "step": "3"
      +                "timestamp": "1641966267354"
      +              }
      +              {
      +                "loss": "2.212251901626587"
      +                "rev": "main"
      +                "step": "4"
      +                "timestamp": "1641966285745"
      +              }
      +              {
      +                "loss": "2.1894900798797607"
      +                "rev": "main"
      +                "step": "5"
      +                "timestamp": "1641966303339"
      +              }
      +              {
      +                "loss": "2.165510654449463"
      +                "rev": "main"
      +                "step": "6"
      +                "timestamp": "1641966320693"
      +              }
      +              {
      +                "loss": "2.135964870452881"
      +                "rev": "main"
      +                "step": "7"
      +                "timestamp": "1641966335781"
      +              }
      +              {
      +                "loss": "2.114135265350342"
      +                "rev": "main"
      +                "step": "8"
      +                "timestamp": "1641966351758"
      +              }
      +              {
      +                "loss": "2.0380799770355225"
      +                "rev": "4fb124a"
      +                "step": "0"
      +                "timestamp": "1642041230991"
      +              }
      +              {
      +                "loss": "2.0002100467681885"
      +                "rev": "4fb124a"
      +                "step": "1"
      +                "timestamp": "1642041244696"
      +              }
      +              {
      +                "loss": "1.9573605060577393"
      +                "rev": "4fb124a"
      +                "step": "2"
      +                "timestamp": "1642041257185"
      +              }
      +              {
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      +                "rev": "4fb124a"
      +                "step": "3"
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      +              }
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      +                "rev": "4fb124a"
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      +                "timestamp": "1642041284801"
      +              }
      +              {
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      +                "rev": "4fb124a"
      +                "step": "5"
      +                "timestamp": "1642041301919"
      +              }
      +              {
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      +                "rev": "4fb124a"
      +                "step": "6"
      +                "timestamp": "1642041318814"
      +              }
      +              {
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      +                "rev": "4fb124a"
      +                "step": "7"
      +                "timestamp": "1642041335775"
      +              }
      +              {
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      +                "rev": "4fb124a"
      +                "step": "8"
      +                "timestamp": "1642041350855"
      +              }
      +              {
      +                "loss": "1.6454246044158936"

      +                "rev": "42b8736"
      +                "step": "0"
      +                "timestamp": "1642041785966"
      +              }
      +              {
      +                "loss": "1.6063436269760132"
      +                "rev": "42b8736"
      +                "step": "1"
      +                "timestamp": "1642041804111"
      +              }
      +              {
      +                "loss": "1.5570942163467407"
      +                "rev": "42b8736"
      +                "step": "2"
      +                "timestamp": "1642041820386"
      +              }
      +              {
      +                "loss": "1.5230435132980347"
      +                "rev": "42b8736"
      +                "step": "3"
      +                "timestamp": "1642041836358"
      +              }
      +              {
      +                "loss": "1.473145842552185"
      +                "rev": "42b8736"
      +                "step": "4"
      +                "timestamp": "1642041851764"
      +              }
      +              {
      +                "loss": "1.444159984588623"
      +                "rev": "42b8736"
      +                "step": "5"
      +                "timestamp": "1642041866838"
      +              }
      +              {
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      +                "rev": "42b8736"
      +                "step": "6"
      +                "timestamp": "1642041881837"
      +              }
      +              {
      +                "loss": "1.370380163192749"
      +                "rev": "42b8736"
      +                "step": "7"
      +                "timestamp": "1642041897483"
      +              }
      +              {
      +                "loss": "1.3217320442199707"
      +                "rev": "42b8736"
      +                "step": "8"
      +                "timestamp": "1642041912764"
      +              }
      +              {
      +                "loss": "2.273470401763916"
      +                "rev": "1ba7bcd"
      +                "step": "0"
      +                "timestamp": "1642041482186"
      +              }
      +              {
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      +                "rev": "1ba7bcd"
      +                "step": "1"
      +                "timestamp": "1642041500577"
      +              }
      +              {
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      +                "rev": "1ba7bcd"
      +                "step": "2"
      +                "timestamp": "1642041519065"
      +              }
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      +                "rev": "1ba7bcd"
      +                "step": "3"
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      +              }
      +              {
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      +                "rev": "1ba7bcd"
      +                "step": "4"
      +                "timestamp": "1642041565772"
      +              }
      +              {
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      +                "rev": "1ba7bcd"
      +                "step": "5"
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      +              }
      +              {
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      +                "rev": "1ba7bcd"
      +                "step": "8"
      +                "timestamp": "1642041648829"
      +              }
      +            ]
      +          }
      +          "encoding": {
      +            "color": {
      +              "legend": {
      +                "disable": true
      +              }
      +              "scale": {
      +                "domain": [
      +                  "workspace"
      +                  "main"
      +                  "4fb124a"
      +                  "42b8736"
      +                  "1ba7bcd"
      +                ]
      +                "range": [
      +                  "#945dd6"
      +                  "#13adc7"
      +                  "#f14c4c"
      +                  "#3794ff"
      +                  "#cca700"
      +                ]
      +              }
      +            }
      +          }
      +          "height": 300
      +          "layer": [
      +            {
      +              "encoding": {
      +                "color": {
      +                  "field": "rev"
      +                  "type": "nominal"
      +                }
      +                "x": {
      +                  "field": "step"
      +                  "title": "step"
      +                  "type": "quantitative"
      +                }
      +                "y": {
      +                  "field": "loss"
      +                  "scale": {
      +                    "zero": false
      +                  }
      +                  "title": "loss"
      +                  "type": "quantitative"
      +                }
      +              }
      +              "layer": [
      +                {
      +                  "mark": "line"
      +                }
      +                {
      +                  "encoding": {
      +                    "opacity": {
      +                      "condition": {
      +                        "selection": "label"
      +                        "value": 1
      +                      }
      +                      "value": 0
      +                    }
      +                  }
      +                  "mark": "point"
      +                  "selection": {
      +                    "label": {
      +                      "clear": "mouseout"
      +                      "empty": "none"
      +                      "encodings": [
      +                        "x"
      +                      ]
      +                      "nearest": true
      +                      "on": "mouseover"
      +                      "type": "single"
      +                    }
      +                  }
      +                }
      +              ]
      +     
Error: 1 tests failed.
        at /Users/mattseddon/PP/vscode-dvc/extension/dist/test/suite/index.js:71:40
        at done (/Users/mattseddon/PP/vscode-dvc/extension/node_modules/mocha/lib/mocha.js:1068:7)
        at processTicksAndRejections (node:internal/process/task_queues:96:5)

       }
      +            {
      +              "layer": [
      +                {
      +                  "encoding": {
      +                    "x": {
      +                      "field": "step"
      +                      "type": "quantitative"
      +                    }
      +                  }
      +                  "mark": {
      +                    "color": "gray"
      +                    "type": "rule"
      +                  }
      +                }
      +                {
      +                  "encoding": {
      +                    "text": {
      +                      "field": "loss"
      +                      "type": "quantitative"
      +                    }
      +                    "x": {
      +                      "field": "step"
      +                      "type": "quantitative"
      +                    }
      +                    "y": {
      +                      "field": "loss"
      +                      "type": "quantitative"
      +                    }
      +                  }
      +                  "layer": [
      +                    {
      +                      "encoding": {
      +                        "color": {
      +                          "field": "rev"
      +                          "type": "nominal"
      +                        }
      +                      }
      +                      "mark": {
      +                        "align": "left"
      +                        "dx": 5
      +                        "dy": -5
      +                        "type": "text"
      +                      }
      +                    }
      +                  ]
      +                }
      +              ]
      +              "transform": [
      +                {
      +                  "filter": {
      +                    "selection": "label"
      +                  }
      +                }
      +              ]
      +            }
      +          ]
      +          "title": ""
      +          "width": 300
      +        }
      +        "multiView": false
      +        "revisions": [
      +          "workspace"
      +          "main"
      +          "4fb124a"
      +          "42b8736"
      +          "1ba7bcd"
      +        ]
      +        "type": "vega"
      +      }
      +    ]
           "predictions.json": [
             {
               "content": {
                 "$schema": "https://vega.github.io/schema/vega-lite/v4.json"
      
        at /Users/mattseddon/PP/vscode-dvc/extension/dist/test/suite/plots/index.test.js:47:45
        at Generator.next (<anonymous>)
        at /Users/mattseddon/PP/vscode-dvc/extension/dist/test/suite/plots/index.test.js:8:71
        at new Promise (<anonymous>)
        at __awaiter (dist/test/suite/plots/index.test.js:4:12)
        at Context.<anonymous> (dist/test/suite/plots/index.test.js:44:64)
        at processImmediate (node:internal/timers:464:21)


----------|---------|----------|---------|---------|-------------------

File      | % Stmts | % Branch | % Funcs | % Lines | Uncovered Line #s 

----------|---------|----------|---------|---------|-------------------

All files |       0 |        0 |       0 |       0 |                   

----------|---------|----------|---------|---------|-------------------

Note: 0 could potentially cause the test suite to hang if the diff gets too big but we can cross that bridge when we get to it.

[codeclimate]

Code Climate has analyzed commit 32d3feb and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (85% is the threshold).

This pull request will bring the total coverage in the repository to 96.3% (0.0% change).

View more on Code Climate.