vscode elixir test setup

test.json

{
  "version": "2.0.0",
  "tasks": [
    {
      "label": "mix test all",
      "type": "shell",
      "command": "mix",
      "args": ["test", "--color", "--trace"],
      "options": {
        "cwd": "${workspaceRoot}",
        "requireFiles": [
          "test/**/test_helper.exs",
          "test/**/*_test.exs"
        ],
      },
      "problemMatcher": "$mixTestFailure"
    },
    {
      "label": "mix test item",
      "type": "shell",
      "command": "mix",
      "args": ["test", "${relativeFile}:${lineNumber}", "--color", "--trace"],
      "options": {
        "cwd": "${workspaceRoot}",
        "requireFiles": [
          "test/**/test_helper.exs",
          "test/**/*_test.exs"
        ],
      },
      "problemMatcher": "$mixTestFailure"
    },
    {
      "label": "mix test file",
      "type": "shell",
      "command": "mix",
      "args": ["test", "${relativeFile}", "--color", "--trace"],
      "options": {
        "cwd": "${workspaceRoot}",
        "requireFiles": [
          "test/**/test_helper.exs",
          "test/**/*_test.exs"
        ],
      },
      "problemMatcher": "$mixTestFailure"
    }
  ]
}