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custom_test.go
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package match
import (
"errors"
"testing"
"github.com/gkampitakis/go-snaps/internal/test"
)
func TestCustomMatcher(t *testing.T) {
t.Run("should create a custom matcher", func(t *testing.T) {
c := Custom("path", func(val any) (any, error) {
return nil, nil
})
test.True(t, c.errOnMissingPath)
test.Equal(t, c.path, "path")
test.Equal(t, c.name, "Custom")
})
t.Run("should allow overriding values", func(t *testing.T) {
c := Custom("path", func(val any) (any, error) {
return nil, nil
}).ErrOnMissingPath(false)
test.False(t, c.errOnMissingPath)
test.Equal(t, c.path, "path")
test.Equal(t, c.name, "Custom")
})
t.Run("JSON", func(t *testing.T) {
j := []byte(`{
"user": {
"name": "mock-user",
"email": "mock-email"
},
"date": "16/10/2022"
}`)
t.Run("should return error in case of missing path", func(t *testing.T) {
c := Custom("missing.key", func(val any) (any, error) {
return nil, nil
})
res, errs := c.JSON(j)
test.Nil(t, res)
test.Equal(t, 1, len(errs))
err := errs[0]
test.Equal(t, "path does not exist", err.Reason.Error())
test.Equal(t, "Custom", err.Matcher)
test.Equal(t, "missing.key", err.Path)
})
t.Run("should ignore error in case of missing path", func(t *testing.T) {
c := Custom("missing.key", func(val any) (any, error) {
return nil, nil
}).ErrOnMissingPath(false)
res, errs := c.JSON(j)
test.Equal(t, j, res)
test.Nil(t, errs)
})
t.Run("should return error from custom callback", func(t *testing.T) {
c := Custom("user.email", func(val any) (any, error) {
return nil, errors.New("custom error")
})
res, errs := c.JSON(j)
test.Nil(t, res)
test.Equal(t, 1, len(errs))
err := errs[0]
test.Equal(t, "custom error", err.Reason.Error())
test.Equal(t, "Custom", err.Matcher)
test.Equal(t, "user.email", err.Path)
})
t.Run("should apply value from custom callback to json", func(t *testing.T) {
c := Custom("user.email", func(val any) (any, error) {
return "replaced email", nil
})
res, errs := c.JSON(j)
expected := `{
"user": {
"name": "mock-user",
"email": "replaced email"
},
"date": "16/10/2022"
}`
test.Equal(t, expected, string(res))
test.Nil(t, errs)
})
})
t.Run("YAML", func(t *testing.T) {
y := []byte(`
user:
name: mock-user
email: mock-email
date: 16/10/2022
`)
t.Run("should return error in case of missing path", func(t *testing.T) {
c := Custom("$.missing.key", func(val any) (any, error) {
return nil, nil
})
res, errs := c.YAML(y)
test.Nil(t, res)
test.Equal(t, 1, len(errs))
err := errs[0]
test.Equal(t, "path does not exist", err.Reason.Error())
test.Equal(t, "Custom", err.Matcher)
test.Equal(t, "$.missing.key", err.Path)
})
t.Run("should ignore error in case of missing path", func(t *testing.T) {
c := Custom("$.missing.key", func(val any) (any, error) {
return nil, nil
}).ErrOnMissingPath(false)
res, errs := c.YAML(y)
test.Equal(t, y, res)
test.Nil(t, errs)
})
t.Run("should return error from custom callback", func(t *testing.T) {
c := Custom("$.user.email", func(val any) (any, error) {
return nil, errors.New("custom error")
})
res, errs := c.YAML(y)
test.Nil(t, res)
test.Equal(t, 1, len(errs))
err := errs[0]
test.Equal(t, "custom error", err.Reason.Error())
test.Equal(t, "Custom", err.Matcher)
test.Equal(t, "$.user.email", err.Path)
})
t.Run("should apply value from custom callback to yaml", func(t *testing.T) {
c := Custom("$.user.email", func(val any) (any, error) {
return "replaced email", nil
})
res, errs := c.YAML(y)
expected := `user:
name: mock-user
email: replaced email
date: 16/10/2022
`
test.Equal(t, expected, string(res))
test.Nil(t, errs)
})
})
}