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package main
import (
"strings"
"testing"
)
type execArgs struct {
fork bool
argPrefixes []string
}
func TestRun(t *testing.T) {
tests := []struct {
name string
args []string
execReturns error
whichReturns string
wantExecArgs []execArgs
wantErr error
}{
{
name: "executable not dex",
args: []string{"tuna", "fish"},
wantExecArgs: []execArgs{{fork: false, argPrefixes: []string{"tuna", "fish"}}},
},
{
name: "executable is full path to dex",
args: []string{"/usr/local/bin/dex", "marshmallow", "zelda"},
whichReturns: "/usr/local/bin/dex",
wantExecArgs: []execArgs{{fork: false, argPrefixes: []string{"/usr/local/bin/dex", "marshmallow", "zelda"}}},
},
{
name: "command is not serve",
args: []string{"dex", "marshmallow", "zelda"},
wantExecArgs: []execArgs{{fork: false, argPrefixes: []string{"dex", "marshmallow", "zelda"}}},
},
{
name: "no templates",
args: []string{"dex", "serve", "config.yaml.not-a-template"},
wantExecArgs: []execArgs{{fork: false, argPrefixes: []string{"dex", "serve", "config.yaml.not-a-template"}}},
},
{
name: "no templates",
args: []string{"dex", "serve", "config.yaml.not-a-template"},
wantExecArgs: []execArgs{{fork: false, argPrefixes: []string{"dex", "serve", "config.yaml.not-a-template"}}},
},
{
name: ".tpl template",
args: []string{"dex", "serve", "config.tpl"},
wantExecArgs: []execArgs{
{fork: true, argPrefixes: []string{"gomplate", "-f", "config.tpl", "-o", "/tmp/dex.config.yaml-"}},
{fork: false, argPrefixes: []string{"dex", "serve", "/tmp/dex.config.yaml-"}},
},
},
{
name: ".tmpl template",
args: []string{"dex", "serve", "config.tmpl"},
wantExecArgs: []execArgs{
{fork: true, argPrefixes: []string{"gomplate", "-f", "config.tmpl", "-o", "/tmp/dex.config.yaml-"}},
{fork: false, argPrefixes: []string{"dex", "serve", "/tmp/dex.config.yaml-"}},
},
},
{
name: ".yaml template",
args: []string{"dex", "serve", "some/path/config.yaml"},
wantExecArgs: []execArgs{
{fork: true, argPrefixes: []string{"gomplate", "-f", "some/path/config.yaml", "-o", "/tmp/dex.config.yaml-"}},
{fork: false, argPrefixes: []string{"dex", "serve", "/tmp/dex.config.yaml-"}},
},
},
}
for _, test := range tests {
t.Run(test.name, func(t *testing.T) {
var gotExecForks []bool
var gotExecArgs [][]string
fakeExec := func(fork bool, args ...string) error {
gotExecForks = append(gotExecForks, fork)
gotExecArgs = append(gotExecArgs, args)
return test.execReturns
}
fakeWhich := func(_ string) string { return test.whichReturns }
gotErr := run(test.args, fakeExec, fakeWhich)
if (test.wantErr == nil) != (gotErr == nil) {
t.Errorf("wanted error %s, got %s", test.wantErr, gotErr)
}
if !execArgsMatch(test.wantExecArgs, gotExecForks, gotExecArgs) {
t.Errorf("wanted exec args %+v, got %+v %+v", test.wantExecArgs, gotExecForks, gotExecArgs)
}
})
}
}
func execArgsMatch(wantExecArgs []execArgs, gotForks []bool, gotExecArgs [][]string) bool {
if len(wantExecArgs) != len(gotForks) {
return false
}
for i := range wantExecArgs {
if wantExecArgs[i].fork != gotForks[i] {
return false
}
for j := range wantExecArgs[i].argPrefixes {
if !strings.HasPrefix(gotExecArgs[i][j], wantExecArgs[i].argPrefixes[j]) {
return false
}
}
}
return true
}