Table Driven Tests

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1. 1 Identify test cases from package exports

   Read package.yml exports to identify functions that need tests

   # From package.yml exports:
   #   - ValidateConfig
   #   - ParseConnectionString
   # Each export = at least one test function

2. 2 Create test struct with descriptive fields

   Use named fields, not positional. Include name, input, expected output, and wantErr

   tests := []struct {
       name    string
       input   Config
       want    bool
       wantErr bool
   }{
       {name: "valid config", input: validConfig, want: true},
       {name: "empty host", input: Config{Host: ""}, wantErr: true},
   }

3. 3 Run subtests with t.Run

   Each test case runs as a named subtest for clear failure reporting

   for _, tt := range tests {
       t.Run(tt.name, func(t *testing.T) {
           got, err := ValidateConfig(tt.input)
           if (err != nil) != tt.wantErr {
               t.Errorf("error = %v, wantErr %v", err, tt.wantErr)
               return
           }
           if got != tt.want {
               t.Errorf("got %v, want %v", got, tt.want)
           }
       })
   }

• Go test
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• external Go Wiki Table Driven Tests