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42ef4fbcc139f88608b914ffee4f0189268ca7d7
kustomize/pkg/expansion/expand_test.go
Ian Howell ed03818e20 This commit enhances the UnstructAdapter 
* Added support for arbitrary data types rather than just strings
* Added support for integer index-able arrays
* Improve code coverage for kunstruct
  - kunstruct around 90%
  - helper at 100%
* Update expansion.Expand method to preserve the original type of the variable
* Ensure the int field such .spec.replicas can be used
  as a source in a first Deployment or as destination of a variable (in the
  second Deployment variable).
2019-06-18 13:43:01 -05:00

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/*
Copyright 2018 The Kubernetes Authors.
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 expansion_test
import (
"fmt"
"testing"
. "sigs.k8s.io/kustomize/pkg/expansion"
)
type expected struct {
count int
edited string
}
func TestMapReference(t *testing.T) {
type env struct {
Name string
Value interface{}
}
envs := []env{
{
Name: "FOO",
Value: "bar",
},
{
Name: "ZOO",
Value: "$(FOO)-1",
},
{
Name: "BLU",
Value: "$(ZOO)-2",
},
{
Name: "INT",
Value: 2,
},
{
Name: "ZINT",
Value: "$(INT)",
},
{
Name: "BOOL",
Value: true,
},
{
Name: "ZBOOL",
Value: "$(BOOL)",
},
}
declaredEnv := map[string]interface{}{
"FOO": "bar",
"ZOO": "$(FOO)-1",
"BLU": "$(ZOO)-2",
"INT": "2",
"ZINT": "$(INT)",
"BOOL": "true",
"ZBOOL": "$(BOOL)",
}
counts := make(map[string]int)
mapping := MappingFuncFor(counts, declaredEnv)
for _, env := range envs {
declaredEnv[env.Name] = Expand(fmt.Sprintf("%v", env.Value), mapping)
}
expectedEnv := map[string]expected{
"FOO": {count: 1, edited: "bar"},
"ZOO": {count: 1, edited: "bar-1"},
"BLU": {count: 0, edited: "bar-1-2"},
"INT": {count: 1, edited: "2"},
"ZINT": {count: 0, edited: "2"},
"BOOL": {count: 1, edited: "true"},
"ZBOOL": {count: 0, edited: "true"},
}
for k, v := range expectedEnv {
if e, a := v, declaredEnv[k]; e.edited != a || e.count != counts[k] {
t.Errorf("Expected %v count=%d, got %v count=%d",
e.edited, e.count, a, counts[k])
} else {
delete(declaredEnv, k)
}
}
if len(declaredEnv) != 0 {
t.Errorf("Unexpected keys in declared env: %v", declaredEnv)
}
}
func TestMapping(t *testing.T) {
context := map[string]interface{}{
"VAR_A": "A",
"VAR_B": "B",
"VAR_C": "C",
"VAR_REF": "$(VAR_A)",
"VAR_EMPTY": "",
}
doExpansionTest(t, context)
}
func TestMappingDual(t *testing.T) {
context := map[string]interface{}{
"VAR_A": "A",
"VAR_EMPTY": "",
}
context2 := map[string]interface{}{
"VAR_B": "B",
"VAR_C": "C",
"VAR_REF": "$(VAR_A)",
}
doExpansionTest(t, context, context2)
}
func doExpansionTest(t *testing.T, context ...map[string]interface{}) {
cases := []struct {
name string
input string
expected string
counts map[string]int
}{
{
name: "whole string",
input: "$(VAR_A)",
expected: "A",
counts: map[string]int{"VAR_A": 1},
},
{
name: "repeat",
input: "$(VAR_A)-$(VAR_A)",
expected: "A-A",
counts: map[string]int{"VAR_A": 2},
},
{
name: "multiple repeats",
input: "$(VAR_A)-$(VAR_B)-$(VAR_B)-$(VAR_B)-$(VAR_A)",
expected: "A-B-B-B-A",
counts: map[string]int{"VAR_A": 2, "VAR_B": 3},
},
{
name: "beginning",
input: "$(VAR_A)-1",
expected: "A-1",
counts: map[string]int{"VAR_A": 1},
},
{
name: "middle",
input: "___$(VAR_B)___",
expected: "___B___",
counts: map[string]int{"VAR_B": 1},
},
{
name: "end",
input: "___$(VAR_C)",
expected: "___C",
counts: map[string]int{"VAR_C": 1},
},
{
name: "compound",
input: "$(VAR_A)_$(VAR_B)_$(VAR_C)",
expected: "A_B_C",
counts: map[string]int{"VAR_A": 1, "VAR_B": 1, "VAR_C": 1},
},
{
name: "escape & expand",
input: "$$(VAR_B)_$(VAR_A)",
expected: "$(VAR_B)_A",
counts: map[string]int{"VAR_A": 1},
},
{
name: "compound escape",
input: "$$(VAR_A)_$$(VAR_B)",
expected: "$(VAR_A)_$(VAR_B)",
},
{
name: "mixed in escapes",
input: "f000-$$VAR_A",
expected: "f000-$VAR_A",
},
{
name: "backslash escape ignored",
input: "foo\\$(VAR_C)bar",
expected: "foo\\Cbar",
counts: map[string]int{"VAR_C": 1},
},
{
name: "backslash escape ignored",
input: "foo\\\\$(VAR_C)bar",
expected: "foo\\\\Cbar",
counts: map[string]int{"VAR_C": 1},
},
{
name: "lots of backslashes",
input: "foo\\\\\\\\$(VAR_A)bar",
expected: "foo\\\\\\\\Abar",
counts: map[string]int{"VAR_A": 1},
},
{
name: "nested var references",
input: "$(VAR_A$(VAR_B))",
expected: "$(VAR_A$(VAR_B))",
},
{
name: "nested var references second type",
input: "$(VAR_A$(VAR_B)",
expected: "$(VAR_A$(VAR_B)",
},
{
name: "value is a reference",
input: "$(VAR_REF)",
expected: "$(VAR_A)",
counts: map[string]int{"VAR_REF": 1},
},
{
name: "value is a reference x 2",
input: "%%$(VAR_REF)--$(VAR_REF)%%",
expected: "%%$(VAR_A)--$(VAR_A)%%",
counts: map[string]int{"VAR_REF": 2},
},
{
name: "empty var",
input: "foo$(VAR_EMPTY)bar",
expected: "foobar",
counts: map[string]int{"VAR_EMPTY": 1},
},
{
name: "unterminated expression",
input: "foo$(VAR_Awhoops!",
expected: "foo$(VAR_Awhoops!",
},
{
name: "expression without operator",
input: "f00__(VAR_A)__",
expected: "f00__(VAR_A)__",
},
{
name: "shell special vars pass through",
input: "$?_boo_$!",
expected: "$?_boo_$!",
},
{
name: "bare operators are ignored",
input: "$VAR_A",
expected: "$VAR_A",
},
{
name: "undefined vars are passed through",
input: "$(VAR_DNE)",
expected: "$(VAR_DNE)",
},
{
name: "multiple (even) operators, var undefined",
input: "$$$$$$(BIG_MONEY)",
expected: "$$$(BIG_MONEY)",
},
{
name: "multiple (even) operators, var defined",
input: "$$$$$$(VAR_A)",
expected: "$$$(VAR_A)",
},
{
name: "multiple (odd) operators, var undefined",
input: "$$$$$$$(GOOD_ODDS)",
expected: "$$$$(GOOD_ODDS)",
},
{
name: "multiple (odd) operators, var defined",
input: "$$$$$$$(VAR_A)",
expected: "$$$A",
counts: map[string]int{"VAR_A": 1},
},
{
name: "missing open expression",
input: "$VAR_A)",
expected: "$VAR_A)",
},
{
name: "shell syntax ignored",
input: "${VAR_A}",
expected: "${VAR_A}",
},
{
name: "trailing incomplete expression not consumed",
input: "$(VAR_B)_______$(A",
expected: "B_______$(A",
counts: map[string]int{"VAR_B": 1},
},
{
name: "trailing incomplete expression, no content, is not consumed",
input: "$(VAR_C)_______$(",
expected: "C_______$(",
counts: map[string]int{"VAR_C": 1},
},
{
name: "operator at end of input string is preserved",
input: "$(VAR_A)foobarzab$",
expected: "Afoobarzab$",
counts: map[string]int{"VAR_A": 1},
},
{
name: "shell escaped incomplete expr",
input: "foo-\\$(VAR_A",
expected: "foo-\\$(VAR_A",
},
{
name: "lots of $( in middle",
input: "--$($($($($--",
expected: "--$($($($($--",
},
{
name: "lots of $( in beginning",
input: "$($($($($--foo$(",
expected: "$($($($($--foo$(",
},
{
name: "lots of $( at end",
input: "foo0--$($($($(",
expected: "foo0--$($($($(",
},
{
name: "escaped operators in variable names are not escaped",
input: "$(foo$$var)",
expected: "$(foo$$var)",
},
{
name: "newline not expanded",
input: "\n",
expected: "\n",
},
}
for _, tc := range cases {
counts := make(map[string]int)
mapping := MappingFuncFor(counts, context...)
expanded := Expand(fmt.Sprintf("%v", tc.input), mapping)
if e, a := tc.expected, expanded; e != a {
t.Errorf("%v: expected %q, got %q", tc.name, e, a)
}
if len(counts) != len(tc.counts) {
t.Errorf("%v: len(counts)=%d != len(tc.counts)=%d",
tc.name, len(counts), len(tc.counts))
}
if len(tc.counts) > 0 {
for k, expectedCount := range tc.counts {
c, ok := counts[k]
if ok {
if c != expectedCount {
t.Errorf(
"%v: k=%s, expected count %d, got %d",
tc.name, k, expectedCount, c)
}
} else {
t.Errorf(
"%v: k=%s, expected count %d, got zero",
tc.name, k, expectedCount)
}
}
}
}
}
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