194 lines
4.9 KiB
Go
194 lines
4.9 KiB
Go
package mcfg
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import (
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"context"
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"encoding/json"
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"fmt"
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. "testing"
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"time"
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"github.com/mediocregopher/mediocre-go-lib/mctx"
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"github.com/mediocregopher/mediocre-go-lib/mrand"
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"github.com/mediocregopher/mediocre-go-lib/mtest/massert"
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)
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// The tests for the different Sources use mchk as their primary method of
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// checking. They end up sharing a lot of the same functionality, so in here is
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// all the code they share
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type srcCommonState struct {
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// availCtxs get updated in place as the run goes on, and mkRoot is used to
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// create the latest version of the root context based on them
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availCtxs []*context.Context
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mkRoot func() context.Context
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expPVs []ParamValue
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// each specific test should wrap this to add the Source itself
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}
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func newSrcCommonState() srcCommonState {
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var scs srcCommonState
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{
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root := context.Background()
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a := mctx.NewChild(root, "a")
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b := mctx.NewChild(root, "b")
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c := mctx.NewChild(root, "c")
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ab := mctx.NewChild(a, "b")
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bc := mctx.NewChild(b, "c")
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abc := mctx.NewChild(ab, "c")
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scs.availCtxs = []*context.Context{&root, &a, &b, &c, &ab, &bc, &abc}
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scs.mkRoot = func() context.Context {
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ab := mctx.WithChild(ab, abc)
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a := mctx.WithChild(a, ab)
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b := mctx.WithChild(b, bc)
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root := mctx.WithChild(root, a)
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root = mctx.WithChild(root, b)
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root = mctx.WithChild(root, c)
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return root
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}
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}
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return scs
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}
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type srcCommonParams struct {
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name string
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availCtxI int // not technically needed, but makes finding the ctx easier
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path []string
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isBool bool
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nonBoolType string // "int", "str", "duration", "json"
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unset bool
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nonBoolVal string
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}
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func (scs srcCommonState) next() srcCommonParams {
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var p srcCommonParams
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if i := mrand.Intn(8); i == 0 {
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p.name = mrand.Hex(1) + "-" + mrand.Hex(8)
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} else {
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p.name = mrand.Hex(8)
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}
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p.availCtxI = mrand.Intn(len(scs.availCtxs))
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p.path = mctx.Path(*scs.availCtxs[p.availCtxI])
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p.isBool = mrand.Intn(8) == 0
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if !p.isBool {
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p.nonBoolType = mrand.Element([]string{
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"int",
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"str",
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"duration",
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"json",
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}, nil).(string)
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}
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p.unset = mrand.Intn(10) == 0
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if p.isBool || p.unset {
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return p
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}
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switch p.nonBoolType {
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case "int":
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p.nonBoolVal = fmt.Sprint(mrand.Int())
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case "str":
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p.nonBoolVal = mrand.Hex(16)
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case "duration":
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dur := time.Duration(mrand.Intn(86400)) * time.Second
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p.nonBoolVal = dur.String()
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case "json":
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b, _ := json.Marshal(map[string]int{
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mrand.Hex(4): mrand.Int(),
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mrand.Hex(4): mrand.Int(),
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mrand.Hex(4): mrand.Int(),
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})
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p.nonBoolVal = string(b)
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}
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return p
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}
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// adds the new param to the ctx, and if the param is expected to be set in
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// the Source adds it to the expected ParamValues as well
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func (scs srcCommonState) applyCtxAndPV(p srcCommonParams) srcCommonState {
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thisCtx := scs.availCtxs[p.availCtxI]
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ctxP := Param{
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Name: p.name,
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IsString: p.nonBoolType == "str" || p.nonBoolType == "duration",
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IsBool: p.isBool,
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// the Sources don't actually care about the other fields of Param,
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// those are only used by Populate once it has all ParamValues together
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}
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*thisCtx = WithParam(*thisCtx, ctxP)
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ctxP, _ = getParam(*thisCtx, ctxP.Name) // get it back out to get any added fields
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if !p.unset {
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pv := ParamValue{Name: ctxP.Name, Path: mctx.Path(ctxP.Context)}
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if p.isBool {
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pv.Value = json.RawMessage("true")
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} else {
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switch p.nonBoolType {
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case "str", "duration":
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pv.Value = json.RawMessage(fmt.Sprintf("%q", p.nonBoolVal))
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case "int", "json":
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pv.Value = json.RawMessage(p.nonBoolVal)
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default:
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panic("shouldn't get here")
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}
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}
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scs.expPVs = append(scs.expPVs, pv)
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}
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return scs
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}
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// given a Source asserts that it's Parse method returns the expected
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// ParamValues
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func (scs srcCommonState) assert(s Source) error {
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root := scs.mkRoot()
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_, gotPVs, err := s.Parse(root)
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if err != nil {
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return err
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}
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return massert.All(
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massert.Length(gotPVs, len(scs.expPVs)),
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massert.Subset(scs.expPVs, gotPVs),
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).Assert()
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}
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func TestSources(t *T) {
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ctx := context.Background()
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ctx, a := WithRequiredInt(ctx, "a", "")
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ctx, b := WithRequiredInt(ctx, "b", "")
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ctx, c := WithRequiredInt(ctx, "c", "")
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_, err := Populate(ctx, Sources{
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&SourceCLI{Args: []string{"--a=1", "--b=666"}},
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&SourceEnv{Env: []string{"B=2", "C=3"}},
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})
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massert.Require(t,
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massert.Nil(err),
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massert.Equal(1, *a),
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massert.Equal(2, *b),
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massert.Equal(3, *c),
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)
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}
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func TestSourceParamValues(t *T) {
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ctx := context.Background()
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ctx, a := WithRequiredInt(ctx, "a", "")
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foo := mctx.NewChild(ctx, "foo")
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foo, b := WithRequiredString(foo, "b", "")
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foo, c := WithBool(foo, "c", "")
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ctx = mctx.WithChild(ctx, foo)
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_, err := Populate(ctx, ParamValues{
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{Name: "a", Value: json.RawMessage(`4`)},
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{Path: []string{"foo"}, Name: "b", Value: json.RawMessage(`"bbb"`)},
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{Path: []string{"foo"}, Name: "c", Value: json.RawMessage("true")},
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})
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massert.Require(t,
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massert.Nil(err),
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massert.Equal(4, *a),
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massert.Equal("bbb", *b),
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massert.Equal(true, *c),
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)
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}
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