Function TestEstimateCostAndRuntimeCost

cel/cel_test.go:1788–1881

TestEstimateCostAndRuntimeCost sanity checks that the cost systems are usable from the program API.

(t *testing.T)

// TestEstimateCostAndRuntimeCost sanity checks that the cost systems are usable from the program API.
func TestEstimateCostAndRuntimeCost(t *testing.T) {
	intList := ListType(IntType)
	zeroCost := checker.CostEstimate{}
	cases := []struct {
		name  string
		expr  string
		decls []EnvOption
		hints map[string]uint64
		want  checker.CostEstimate
		in    any
	}{
		{
			name: "const",
			expr: `"Hello World!"`,
			want: zeroCost,
			in:   map[string]any{},
		},
		{
			name:  "identity",
			expr:  `input`,
			decls: []EnvOption{Variable("input", intList)},
			want:  checker.CostEstimate{Min: 1, Max: 1},
			in:    map[string]any{"input": []int{1, 2}},
		},
		{
			name: "str concat",
			expr: `"abcdefg".contains(str1 + str2)`,
			decls: []EnvOption{
				Variable("str1", StringType),
				Variable("str2", StringType),
			},
			hints: map[string]uint64{"str1": 10, "str2": 10},
			want:  checker.CostEstimate{Min: 2, Max: 6},
			in:    map[string]any{"str1": "val1111111", "str2": "val2222222"},
		},
	}

	for _, tst := range cases {
		tc := tst
		t.Run(tc.name, func(t *testing.T) {
			t.Parallel()
			if tc.hints == nil {
				tc.hints = map[string]uint64{}
			}
			envOpts := []EnvOption{
				CostEstimatorOptions(
					checker.OverloadCostEstimate(overloads.TimestampToYear, estimateTimestampToYear),
				),
			}
			envOpts = append(envOpts, tc.decls...)
			env := testEnv(t, envOpts...)
			ast, iss := env.Compile(tc.expr)
			if iss.Err() != nil {
				t.Fatalf("env.Compile(%v) failed: %v", tc.expr, iss.Err())
			}
			est, err := env.EstimateCost(ast, testCostEstimator{hints: tc.hints})
			if err != nil {
				t.Fatalf("Env.EstimateCost(ast *Ast, estimator checker.CostEstimator) failed to estimate cost: %s\n", err)