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// Copyright 2021 Google Inc. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package config
import (
"testing"
)
func TestExpandVars(t *testing.T) {
testCases := []struct {
description string
exportedVars map[string]variableValue
toExpand string
expectedValues []string
}{
{
description: "single level expansion",
exportedVars: map[string]variableValue{
"foo": variableValue([]string{"bar"}),
},
toExpand: "${foo}",
expectedValues: []string{"bar"},
},
{
description: "double level expansion",
exportedVars: map[string]variableValue{
"foo": variableValue([]string{"${bar}"}),
"bar": variableValue([]string{"baz"}),
},
toExpand: "${foo}",
expectedValues: []string{"baz"},
},
{
description: "double level expansion with a literal",
exportedVars: map[string]variableValue{
"a": variableValue([]string{"${b}", "c"}),
"b": variableValue([]string{"d"}),
},
toExpand: "${a}",
expectedValues: []string{"d", "c"},
},
{
description: "double level expansion, with two variables in a string",
exportedVars: map[string]variableValue{
"a": variableValue([]string{"${b} ${c}"}),
"b": variableValue([]string{"d"}),
"c": variableValue([]string{"e"}),
},
toExpand: "${a}",
expectedValues: []string{"d", "e"},
},
{
description: "triple level expansion with two variables in a string",
exportedVars: map[string]variableValue{
"a": variableValue([]string{"${b} ${c}"}),
"b": variableValue([]string{"${c}", "${d}"}),
"c": variableValue([]string{"${d}"}),
"d": variableValue([]string{"foo"}),
},
toExpand: "${a}",
expectedValues: []string{"foo", "foo", "foo"},
},
}
for _, testCase := range testCases {
t.Run(testCase.description, func(t *testing.T) {
output := expandVar(testCase.toExpand, testCase.exportedVars)
if len(output) != len(testCase.expectedValues) {
t.Errorf("Expected %d values, got %d", len(testCase.expectedValues), len(output))
}
for i, actual := range output {
expectedValue := testCase.expectedValues[i]
if actual != expectedValue {
t.Errorf("Actual value '%s' doesn't match expected value '%s'", actual, expectedValue)
}
}
})
}
}
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