Function TestCanFunc

ext/tryfunc/tryfunc_test.go:202–264

(t *testing.T)

}

func TestCanFunc(t *testing.T) {
	tests := map[string]struct {
		expr string
		vars map[string]cty.Value
		want cty.Value
	}{
		"succeeds": {
			`can(1)`,
			nil,
			cty.True,
		},
		"fails": {
			`can(nope)`,
			nil,
			cty.False,
		},
		"simple unknown": {
			`can(unknown)`,
			map[string]cty.Value{
				"unknown": cty.UnknownVal(cty.Number),
			},
			cty.UnknownVal(cty.Bool),
		},
		"traversal through unknown": {
			`can(unknown.foo)`,
			map[string]cty.Value{
				"unknown": cty.UnknownVal(cty.Map(cty.Number)),
			},
			cty.UnknownVal(cty.Bool),
		},
		"deep unknown": {
			`can(has_unknown)`,
			map[string]cty.Value{
				"has_unknown": cty.ListVal([]cty.Value{cty.UnknownVal(cty.Bool)}),
			},
			cty.UnknownVal(cty.Bool),
		},
	}

	for k, test := range tests {
		t.Run(k, func(t *testing.T) {
			expr, diags := hclsyntax.ParseExpression([]byte(test.expr), "test.hcl", hcl.Pos{Line: 1, Column: 1})
			if diags.HasErrors() {
				t.Fatalf("unexpected problems: %s", diags.Error())
			}

			ctx := &hcl.EvalContext{
				Variables: test.vars,
				Functions: map[string]function.Function{
					"can": CanFunc,
				},
			}

			got, err := expr.Value(ctx)
			if err != nil {
				t.Errorf("unexpected error\ngot:  %s\nwant: <nil>", err)
			}
			if !test.want.RawEquals(got) {