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Overview ¶
Package ddt provides utilities to populate test cases for data-driven tests.
Index ¶
Examples ¶
Constants ¶
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Variables ¶
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Functions ¶
func LoadTestCasesFromDerivedJSONFile ¶
func LoadTestCasesFromDerivedJSONFile(testCasesToLoad interface{}) error
LoadTestCasesFromDerivedJSONFile loads test cases from a JSON file whose path is derived from the caller's test function name and file. The file path is "<package under test>/_ddt/<basename of test file>.json"; for example, "hitchhiker/_ddt/question_test.json" with the following schema:
{"testCases": [{<properties of the test case to unmarshal>}, ...]}
For example, the JSON content may look like the following:
{ "testCases": [ { "id": "The Ultimate Question", "input": { "question": "What do you get when you multiply six by nine?", "timeoutInHours": 65700000000, "config": {"base": 13} }, "expected": { "answer": "42", "error": null } } ] }
The details of the test case struct are left for the tester to specify.
Example ¶
t := &testing.T{} answer := func(q string, timeout int, config map[string]interface{}) (string, error) { return "42", nil } var testCases []struct { ID string `json:"id"` Input struct { Question string `json:"question"` TimeoutInHours int `json:"timeoutInHours"` Config map[string]interface{} `json:"config"` } `json:"input"` Expected struct { Answer string `json:"answer"` Error error `json:"error"` } `json:"expected"` } mustWriteJSONFile("ExampleLoadTestCasesFromDerivedJSONFile.json", vanillaContent) err := ddt.LoadTestCasesFromDerivedJSONFile(&testCases) if assert.For(t).ThatActualError(err).IsNil().Passed() { for _, c := range testCases { a, err := answer(c.Input.Question, c.Input.TimeoutInHours, c.Input.Config) assert.For(t, c.ID).ThatActual(a).Equals(c.Expected.Answer) assert.For(t, c.ID).ThatActualError(err).Equals(c.Expected.Error) fmt.Println("Actual Answer:", a) } }
Output: Actual Answer: 42 Actual Answer: 42
Types ¶
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