go / intermediate
Snippet
Implementing Table-Driven Tests
Table-driven testing is a Go idiom where test cases are defined as a slice of anonymous structs. This makes it easy to add new scenarios and ensures consistent testing logic across multiple inputs.
snippet.go
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func TestAdd(t *testing.T) {tests := []struct {a, b, want int}{{1, 2, 3},{0, 0, 0},{-1, 1, 0},}for _, tt := range tests {got := Add(tt.a, tt.b)if got != tt.want {t.Errorf("Add(%d, %d) = %d; want %d", tt.a, tt.b, got, tt.want)}}}
Breakdown
1
struct { a, b, want int }
Defines the structure for input parameters and expected output.
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range tests
Iterates through each defined test case in the table.
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t.Errorf(...)
Reports a failure but allows the loop to continue with other test cases.