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Add test to demonstrate tagging fallback.
Typo fix. Fix issues in test. Update test code.
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package bson_test | ||
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import ( | ||
"github.com/globalsign/mgo/bson" | ||
. "gopkg.in/check.v1" | ||
) | ||
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type mixedTagging struct { | ||
First string | ||
Second string `bson:"second_field"` | ||
Third string `json:"third_field"` | ||
Fourth string `bson:"fourth_field" json:"alternate"` | ||
} | ||
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// TestTaggingFallback checks that tagging fallback can be used/works as expected. | ||
func (s *S) TestTaggingFallback(c *C) { | ||
initial := &mixedTagging{ | ||
First: "One", | ||
Second: "Two", | ||
Third: "Three", | ||
Fourth: "Four", | ||
} | ||
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// Take only testing.T, leave only footprints. | ||
initialState := bson.JSONTagFallbackState() | ||
defer bson.SetJSONTagFallback(initialState) | ||
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// Marshal with the new mode applied. | ||
bson.SetJSONTagFallback(true) | ||
bson, errBSON := bson.Marshal(initial) | ||
c.Assert(errBSON, IsNil) | ||
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// Unmarshal into a generic map so that we can pick up the actual field names | ||
// selected. | ||
target := make(map[string]string) | ||
errUnmarshal := bson.Unmarshal(bson, target) | ||
c.Assert(errUnmarshal, IsNil) | ||
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// No tag, so standard naming | ||
_, firstExists := target["first"] | ||
c.Assert(firstExists, Exists, true) | ||
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// Just a BSON tag | ||
_, secondExists := target["second_field"] | ||
c.Assert(secondExists, Exists, true) | ||
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// Just a JSON tag | ||
_, thirdExists := target["third_field"] | ||
c.Assert(thirdExists, Exists, true) | ||
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// Should marshal 4th as fourth_field (since we have both tags) | ||
_, fourthExists := target["fourth_field"] | ||
c.Assert(fourthExists, Exists, true) | ||
} |